AFAQ LEADERS CLUB

MCQS OF SCIENCE

(HIGH)

1. the fuel used by cells in cellular reparation is

glucose

2. the sun light absorbed by chlorophylls is converted into the

Chemical energy

3. the energy is obtained by organisms by

metabolizing of food

4. the kind of respiration through which skeleton nucleus of human body gets the energy is

anaerobic respiration

5. when atoms of hydrogen give electrons to chlorophyll them the atoms become

ions

6. the energy released by break down of bound is

kinetic energy

7. the five sugar in ATP molecule is known as

ribose

8. the loss of electron is known as

oxidation

9. the substances that absorbs viable light is known AS

pigments

10. the sight of occurrence of electron transport chain and krebs cycle is

mitochondria

11. the kind of cellular respiration which occurs in presence of oxygen

aerobic

12. the sight of light reactions involved in photosynthesis are thylakoid membranes of

phloem tissue

13. the organisms that gets energy from anaerobic are called

anaerobes

14. the scientist Melvin Calvin was awarded by noble prize in

1961

15. the reactions which occurs in first phase of Photosynthesis are called

light reaction

16. the gain of electrons is known as

reduction

17. the ADP is recombined with PI to from

adeneine tri phosphate

18. in the process of glycolysis the NADH generates

2ATP

19. The site of the glycolysis stage in aerobic respiration is

cytoplasm

20. the anaerobic respiration the number of ATP produced as net profit are

-2

21. in electron transport chain the three ATP molecules produces

NADH

22. In comparison of respiration the chloroplasts are considered as sites for

photosynthesis

23. the second phase of photosynthesis in which carbon dioxide is reduced

to make glucose

24. in comparison of photosynthesis the site for respiration is

mitochondria

25. the examples of activity which follows catabolic mechanism is

respiration

26. the high energy molecule that are made by capturing light energy are

NADPH and ATP

27. the redox reaction in living organisms involves the gain and loss of

hydrogen atoms

28. the three pairs of salivary glands release a specific juice in oral cavity called

saliva

29. the foods from which humans can get carbohydrates does not include

white vegetables

30. the bile is secreted by

liver

31. the tube in digestive system that extends to anus from mouth is classified as

alimentary canal

32. the major macronutrient which is the component of enzymes and vitamins is

Sulphur

33. the symptoms of scurvy include

slow healing of wounds, joint and muscles pain, bleeding gums and dry skin

34. the iron component of myoglobin in

muscle cells

35. the grain legumes and eggs are considered as dietary source of

proteins

36. the gut of disorder in which sufferer experiences hard faces with difficulty to eliminates called

constipation

37. the nutrients that are required by plants in smaller quantities are considered as

micro nutrients

38. the tube-like structure un food enters after being swallowed

esophagus

39. the lipids that are found in food are made up of

fatty acids

40. the name of enzyme present in pancreatic juice is called

trypsin

41. the process through which lipids are digested by liver is called

emulsification

42. the starch, lactose, maltose and sucrose are classified a kind of

carbohydrates

43. The amount of calories found in one gram of protein is

4

44. the gland which is located on right side of abdomen beneath the diaphragm is

liver

45. the mean section of alimentary canal includes

pharynx and stomach, oral cavity and esophagus, large and small intestine

46. the iron is compound of hemoglobin in

red blood cells

47. if micronutrients and macro nutrients are not available to plants then the plants

show abnormalities that do not grow

48. the disease in children which is caused by deficiency of vitamin D IS

rickets

49. the source of vitamin D does not include

uv from sun

50. the dilated part of alimentary canal is known as

stomach

51. the gastric juice is composed of

none of above

52. the inorganic elements that cannot be made in the bodies and are originated in the earth are called

minerals

53. the term anemia means

lack of blood

54. the function of liver includes

A destroying old RBCs, production of fibrinogen, de amination

55. the largest gland of body is

liver

56. the numerous finger like projection in the folds of wall of ileum is known as

vilii

57. the neutral occurring source of vitamin D is

uv from sun

58. the two main portions of stomach include

cardiac portion & pyloric portion

59. the soil remains of the flood after water absorption of water is called

facieses

60. the magnesium is important for enzymes to produce

sugars, fats & carbohydrates

61. the esophagus connects the pharynx to the

stomach

62. the veins through which foods molecules goes towards the heart is called

A hepatic vein

B portal vein

C lateral vein

D ileum vein

63. the disease caused by the deficiency of minerals

anemia

64. the enzyme released in saliva which function in semi digestion of starch is called

salivary amylase

65. the process of taking the food in is called

ingestion

66. the length of esophagus in adult human is

25cm

67. the nitrogen is use ful for plants in the forms of

nitrates

68. the bile secreted by liver is stored in

gall bladder

69. the wilting and yellowing of leaves is due to the

deficiency of magnesium

70. the length of ileum is

3.5m

71. the function of oral cavity is

lubrication & chemical digestion

72. the minerals which is necessary for blood clothing and maintenance of teeth and bones is

calcium

73. the nightblindess is caused by

deficiency of vitamin a

74. the top of tr achea is known as

larynx

75. the source of calcium includes

cabbage and nuts, milk and beans & cheese and egg beans

76. the soup like mixture in which food is converted after digestion is called

chyme

77. the heart receive oxygenated blood from

lungs

78. In the foetal and embryonic life the red blood cells are formed in

spleen and liver

79. considering cardiac cycle the ventricular contraction period is considered

ventricular systole

80. the value which prevents the blood backflow to right atrium from right ventricle is known as

bicuspid valve

81. 8the single layer of cells which surrounds the pericycle is

Endodermis

82. the shape of red blood cells are

bi concave

83. the function of white blood cells is to act as agent in

body defense system

84. after receiving the blood from lungs the heart pumps it to the

body

85. the components of blood circulatory in humans includes

blood, blood vessels & heart

86. the pressure of blood is high in

arteries

87. the percentage of blood in plasma is about

90-92%

88. the rhythmic contraction and expansion of artery when blood is forced to pass through it is called

pulse

89. the pulmonary veins are veins from

lings

90. the oxygenated blood is brought to left atrium from lings through

pulmonary veins

91. during the day the plants keep their

stomata open

92. the blood cells that do not have any pigment and nucleus

thrombocytes

93. the high blood pressure means

hypertension

94. the heart attack occurs when there is blood clotting in

coronary arteries

95. the blood cells that are present in human body in numerous numbers are

red blood cells

96. the myocardial infarction is also known as

heart attack

97. the smaller vessels in which arteries are divided after entering the body organs are called

arterioles

98. after the contraction of night atrium the deoxygenated blood passes it on to the

right ventricle

99. the number of chambers in human heart are

four

100. considering the structure of human heart the deoxygenated blood is received by

right atrium

101. the water in blood in which metabolites, salts, proteins and wastes are dissolved are

plasma

102. the sac in which heart is enclosed is known as

peri cardeium

103. the inner side of guard cells is

concave

104. the person haring antigen B on surface of RBC has

blood group B

105. the transpiration in plants occurs through

stomata in leaves

106. the outer side of guard cells

convex

107. the muscular organ which is responsible to pump blood through the blood vessels is known as

heart

108. the kind of pull which is responsible for conduction of salts and water to aerial parts of plats from the roots is called

transpiration pull

109. the individuals having blood group AB are considered as

universal recipients

110. the number of guard cells of stoma are

two

111. the function of hemoglobin is blood is

transportation of oxygen & transportation of carbon dioxide

112. the places in human body where artery is closed to the skin includes

wrist, top of foot and neck

113. the time for atrial systole in one heart beat is

sec

114. the normal PH of blood is

7.4

115. the tissues which are responsible for the transportation of dissolved substances and water to aerial parts from roots are

xylem tissues

116. after entering into the tissues the arteries are divided into

capillaries

117. the temporary seal at damaged area is classified as

clot

118. the water is drawn into the mesophyll cells from

xylem

119. the phloem tissue consists of

both B and C

120. the disease that can be transferred to recipient from affected blood donors are

AIDS, hepatitis C & hepatitis B

121. the transpiration of water is also considered as

loss of water

122. the amount of blood is adult human is

5 liters

123. the xylem in plants acts as one-way street from

roots

124. the artery that supplies blood to the liver is

hepatic artery

125. metal difficult to oxidize

noble metals

126. the most metallic among the following is

K

127. as we move across the period the electronegativity

increases

128. elements that have properties of metals and non metals are called

metalloids

129. the oxide of aluminum is

amphoteric

130. halogens react with metals to from

halides

131. the tendency of metal to loose electron is

electroactivity

132. non-metals are poor conductors of

heat & electricity

133. free radicals are electrically

neutral

134. the empirical formula for water is

H2O

135. natural force that holds elements together is called

chemical bond

136. Ca on loosing 2 electrons becomes

Ca+2

137. biochemistry deals with

physical and chemical changes in living organism

138. mass number of an atom is

number of protons & number of neutrons

139. a mole of any substance contains

6.022 x 1023 particles

140. the mass of an atom relative to C12 is

relative atomic mass

141. over 70% of earths crust is covered with

water

142. the list which contains elements is

calcium, Sulphur, carbon

143. the smallest part of an element that can not exist as a free state is

atom

144. a free radical has

unpaired electrons

145. 1 mole of substance refer to

molar mass

146. the number of protons in nucleus constitute its

atomic number

147. compounds have atoms of

different sizes

148. an ionic compound is electrically

neutral

149. 25 gram molecular mass of C6H12O6 is

180.096g

150. in glucose the simples ratio between C, H and O is

1:2:1

151. formula mass of NaCl is

58.5 amu

152. the branch of chemistry which deals with substance containing carbon is called

organic chemistry

153. matter is anything that

occupies space & has mass

154. the formula which gives the simplest whole number ratio of atoms is

empirical formula

155. a substance whose all atoms have same atomic number is

element

156. by passing hydrogen gas through vegetable oil it is converted into

ghee

157. fog is a solution of

water vapors in air

158. the number of moles of solution dissolved per dm3 of solution is

molarity

159. solubility is the amount of solute dissolved in

100 g of solvent

160. solid solute of metals are called

alloys

161. in solution the particles are

invisible

162. in amalgam the solvent is

solid

163. when the tiny particles of a substance are dispersed through medium, then the mixture is

colloid

164. an unsaturated solution

can add be made

165. concentration of solution is the

quantity of solute in given solvent

166. when NaCl is dissolved in water the negative and of water molecule is attracted towards

Na

167. mass of solute dissolved in long of solution is

percentage of solution

168. the only liquid metal at room temperature

mercury

169. both of element of first period contains valence electrons in

K shell

170. in periodic table helium is placed at

top right corner

171. the first three period are

short periods

172. noble gases are present in

VIII A group

173. energy required to remove an electron from outer most shell is called

ionization energy

174. as we go from top to bottom in a group the shielding effect

Increase

175. group A elements are called

representation elements

176. period number of element indicates in

value of valence of shell

177. the average distance between uncles and outer shell is called

atomic size

178. the ability of atom to attract electron towards it self is called

electronegativity

179. the horizontal rows of periodic table are

periods

180. the period number of Al 2713

3

181. IN PERIODIC TABLE ELEMENTS WITH SIMILAR VALENCE SHELL CONFIGRATION ARE PLACED IN DIFFERENT

same group

182. group like alkaline earth metals are

IIA

183. physical properties depend upon the

size of atom

184. elements are arrange in the order of decreasing atomic number

Increasing atomic number

185. the process in which the solid change directly into vapors without changing in liquid state is called

sublimation

186. conversion of a liquid to gas at all temperatures is called

evaporation

187. temperatures at which the solid starts melting is called

melting point

188. the mathematical expression that describe the boyles law is

PV=CONSTANT

189. the movement of molecule from higher concentration to lower concentration is called

diffusion

190. at mount Everest the water boils at

70

191. barometer is invented by

Torricelli

192. solids whose atoms arrange themselves in different from are

allographs

193. the process in which the vapor molecules are recaptured by the molecules at liquid surface is called

condensation

194. 1 atmosphere pressure is equal

101.325 k pa

195. a gas that shields living things on surface of earth from harmful uv radiation

O3

196. AS THE MOLECULAR mass of gasses increase their density

increase

197. on applying pressure, the volume of gas

decrease

198. in pressure cooker the pressure applied is

2atm

199. the escape of gas molecules from a small hole one after the other is called

effusion

200. force exerted by a gas on unit area of container is called

pressure

201. at the constant temperature when pressure is decreased the average kinetic energy of gas molecules

remain the unchanged

202. noble gases are stable because they have

8 electrons in valence shell

203. bonds which involve 3 shared pairs are

triple covalent bond

204. to form anion the non metal atom

gains electron

205. oxygen belongs to group VIA so number of electron in its valence shell are

6

206. electrons pairs which are not shared by atoms are called

lone pairs

207. ionic crystal have

high melting point

208. helium is chemically

inert

209. the bond formed by mutual sharing of electron is

covalent bond

210. chloroform is also called

tri chloromethane

211. molecular formula of ethne is

C2H6

212. Which of the following is used as antifreeze in automobile radiators?

ethylene glycol

213. in alkanes (saturated hydrocarbons) each carbon atom forms

4 bonds

214. which of the following is used as an anesthetic?

chloroform

215. which of the following are saturated hydrocarbons?

alkanes

216. what is the color of the flame with the most alkanes barn

blue

217. the physical state of higher alkanes is

solid

218. incomplete combustion of methane gives

carbon mono oxide carbon and water

219. the term used for the process which there is addition of nascent hydrogen is

reduction

220. the simplest alkane is

methane

221. loss of water is called

dehydration

222. each hydrogen atom in n alkane forms

one bond

223. mathane (chu) is used as

all of above

224. loss of hydrogen halide from alkyl halide gives

alkenes

225. the reactions of any substance with air is called

combustion

226. in alkenes the two carbon atoms forming double bond are joined too how many atom

three

227. test for the presence of the alkenes is called

Baeyers test

228. the red color of tomatoes is due to alkene named

lycopene

229. each carbon atom in an alkane forms

four bond

230. odor of ethyne is

garlic like

231. alkanes that contains 5 to 16 atoms are in

liquid state

232. when methane and chorine are reacted in direct sunlight the reaction is

explosive

233. methane is reacted with chlorine in

diffused sunlight

234. what is the representation of a reversible reaction

double arrow

235. the rate at which the reaction proceeds is directly proportional to

products of the active masses of reactants

236. due to higher concentration of reactants the rate of forward reaction is

highest

237. in the reverse reaction so3 decomposes into

so2 and o2

238. When diluting acid always add

acid to water

239. the state at which downward and reverse reactions occur at same rate is

equilibrium

240. which of the following is used as catalyst in contact process?

pt

241. which process is used for the large scale production of sulphuric acid

contact process

242. the reactions in which reactants react to form products and simultaneously products reverse back into reactants are called

reversible reactions

243. the substance which increase the rate of reaction is called

catalyst

244. a reversible reaction

never goes to completion

245. what is the term used for a state of a chemical reaction in which forward and reverse reactions take place at the same rate?

chemical equilibrium

246. the negative logarithm of the molar concentration of +ions in aqueous solutions is called

PH

247. 129NA2SO4 is a/an

normal salt

248. a base turns red litmus paper to

blue

249. thePH of ammonia solution is

11

250. which of the following is used to clean metals and bricks?

hydro chloric

251. how much hydrochloric acid is secreted each day by gastric glands

liter

252. KHCO3 is a/an

acid salt

253. what do we do use to reduce unpleasant fishy odor?

citric acid

254. PH method was proposed by

Soren Sorenson

255. color is changed from red to yellow by methyl red at

PH6

256. CONSIDERING THE METHODS FOR MAKING SALT REACTION OF ACID AND BASE GIVES

SALT AND WATER

257. what is the PH of gastric juice

1

258. what is the PH at which methyl red changes color

5.5

259. considering Bronsted lowery theory an acid is a

proton donor

260. the color of methyl orange in NaOH solution is

yellow

261. the color of methyl orange in soap is

yellow

262. the first successful theory of acid and bases was proposed by

savant Arrhenius

263. the color of the phenolphthalein is basic solution is

pink

264. when PH of a solution is less then7 it becomes

acidic

265. the PH of distilled water is

7

266. The PH value of saliva is

6

267. The acid turns the blue litmus paper

red

268. taste of base is

bitter

269. the color of methyl red in acidic solution is

red

270. substances the react with both acid and bases are called

amphoteric

271. During etching a piece of metal or glass is covered with

wax

272. water is an example of

amphoteric

273. what is the cause of unpleasant fishy odor

amines

274. solution becomes acidic when PH IS

LESS THAN 7

275. The PH of milk magnesia is

10

276. A base is a substance that ionizes in water to produce

H +ions

277. which of the following increase when PH is less than 7

H+

278. solution is basic when PH IS

greater than 7

279. secretion of too much acid in the stomach causes

indigestion

280. the ratio of hydrogen and oxygen in water molecule by volume is

2:1

281. the fourth step pf row water treatment is

chlorination

282. the density of water becomes maximum at

4c

283. fresh water available to men is

0.20%

284. permanent hardness of water is caused due to the presence of dissolved

sulphate or chlorides of calcium or mg

285. the type of hepatitis spread through polluted water is

hepatitis A and hepatitis B

286. property due to which water acts as a universal solvent is

polarity and ability to make hydrogen bond

287. water exits in only

three state

288. an allotropic form of oxygen comprising thre oxygen atoms is called

ozone

289. majority of the UV rays are screened out by

ozone

290. most of the dust particles and water vapors are present in

troposphere

291. any thing that has a harmful effect on some part of the environment is called

pollutant

292. which of the following is an excellent heat absorber and causes global warming

lead compound

293. which of the following is the third layer of atmosphere as one as moves upwards from the earth surface

thermosphere

294. which of the following makes up most of the air?

nitrogen

295. the extension astrosphere above earths surface is

12 km

296. energy of sunlight is converted into heat by

oxygen and nitrogen

297. what is the term used for the area in which the amount of ozone has been reduced

black hole

298. height of mesosphere is

50-80 km

299. the meaning of he term strato is

layer

300. the source of CFCS is

aerosol spray foams

301. which layer of atmosphere is first exposed to sun light

thermosphere

302. the source of carbon monoxide is

incomplete burning of woods, fuels and exhaust fumes of motor vehicles

303. most of the mass of atmosphere is contained in

troposphere

304. process in which metal ions are reduced to free metal is called

smelting

305. ore of ions is called

haematite

306. compounds which are added in soil to provide essential elements to plants are

fertilizer

307. an object that revolves around a plants is called

satellite

308. to complete one revolution around the earth the communication satellite take

24 hours

309. the first man who gave the concept of gravity was

Isaac newton

310. the gravitational force of attraction between satellite and earth provides

centripetal force

311. the attracts a body with a force equal to its

weight

312. the natural satellite of earth is

moon

313. value of g increases with the

decrease in altitude

314. the moon completes one revolution around earth is in

27.3 days

315. gravitational constant is universally denoted by

G

316. in SI units the value of gravitational constant (G) is

6.673 r time ; 10-11

317. the distance of moon from earth is

380,000 km

318. the mass of the earth is

6 x 1024

319. the action and reaction due to force of gravitation are equal in magnitude but opposite in

direction

320. if the mass of the earth is 6 x 1024 radius is 6400km and altitude is 1000km then the value of g will be

7.3 ms-2

321. the weight of an object if the value of g on moon is 1.6 ms -2 having mass equals 100kg is

160N

322. with the gain of altitude the value if g

decreases

323. the mass of earth is

6x1024kg

324. to move around the earth a satellite requires

centripetal force

325. the weight of body is due to force of gravitation between

body and earth

326. the study of matter, energy and their mutual interaction is called

physics

327. the number of base units in SI are

7

328. the fundamental of base unit of time in SI is

second

329. one Nano meter is equal to

103g

330. 10-6 second is called

micro seconds

331. in scientific notation, 58000 in can be written as

5.8x104m

332. the least count of Vernier caliper is equal to

cm

333. the smallest change a sensitive beam balance can record is

100 mg

334. by using prefixes, we can write 335x10-8s as

3.35 s

335. when a standard is set for a quantity then the standard quantity is

unit

336. the study of the internal structure of the earth is known as

geo physics

337. the word or letters added before a unit and stands for the multiples or sub-multiples of that unit are called

prefixes

338. the seconds in a day can be written in standard from as

8.64x105s

339. the study of motion of object its causes and effects are called

mechanics

340. an instrument used to measure small lengths such as internal or external diameter or length of a cylinder etc is called

Vernier caliper

341. the prefix for 4800000W is

4800 kw

342. in screw gauge the distance between consecutive threads on the spindle is

1mm

343. the significant digits in 3587 are

4

344. the word science is derived from Latin word

Scientia

345. the least count of digital stop watch is

0.01s

346. the least count of physical balance is

0.01g

347. a graduated glass cylinder marked in millimeters is called a

measuring cylinder

348. the international system of units is commonly referred as

SI

349. the significant digits in 275.00 are

5

350. the unit of volume is

meter3

351. 1.36 can be rounded to

1.4

352. the knowledge gained through observations and experiments is known as

science

353. by converting 30,000gms in kilograms we get

30kg

354. volume, area, speed and force are the examples of

derived quantities

355. quantities on the basis of which other one are expressed wre called

base quantities

356. the smallest possible division up to which an instrument can measure is called

least count

357. speed x time is equal to

distance

358. scaler quantities are completely described by their

magnitude

359. the gravitational acceleration is the acceleration of bodies

freely falling

360. the flying speed of a falcon is

200 kmh-1

361. 344 a quantity described by magnitude and direction both is called

vector

362. distances covered per time taken is equal to

speed

363. the total length of path is named

distance

364. if a body does not rotate then its motion is

translational

365. gravitational acceleration for the bodies moving up is

negative

366. velocities is the rate of change of

displacement

367. the rate of change of velocity is called

acceleration

368. the study of motion of an object without discussing the cause of motion is known as

kinematics

369. the quantities between which graph is plotted is called

variable

370. thermal energy from a hot body flows to a cold body in the form of

heat

371. transfers of heat by actual movement of molecules from hot place to a cold place is known as

convection

372. land and sea breezes are the result of

convection

373. heat is transferred in solids by

conduction

374. the substance through which heat does not conduct easily are called

bad conductors

375. the amount of heat absorbed by a body depends upon the

color of its surface and nature of its surface

376. The branch of science which deals with the composition, structure, properties and reaction of matter is called:

Chemistry

377. Anything that has mass and occupies space is called:

Matter

378. The number of naturally occurring elements are:

92.

379. The percentage presence of atmospheric oxygen is:

21%

380. The combining capacity of an element with another element is known as:

Valency

381. Valency depends upon the number of:

Electron

382. The symbol of sodium is:

Na

383. Magnesium has electrons in its valence shell:

2

384. Carbon has electrons in its valence shell:

4

385. Valency of Na is:

1

386. Valency of Ca is:

2

387. Valency of carbon is:

4

388. The symbol of boron is:

B

389. Mass number is the sum of number of protons:

Electron

390. The molecular formula of hydrogen per oxide is:

H2O2

391. The empirical formula of glucose is:

CH2O

392. The chemical formula of water is:

H2O

393. The chemical formula of nitric acid is:

NHO3

394. The atomic mass of nitrogen is:

14 amu

395. The molecular mass of HNO3 is:

63 amu

396. An atom or group of atoms having positive charge on it is called:

Cation

397. An atom or group of atoms that has a negative charge on it, is called:

Anion

398. An atom or group of atoms having a charge on it is called:

Ion

399. Chemical combination of atoms results in the formation of:

Molecule

400. An example of diatomic molecule is:

Cl2

401. One atomic mass unit (a.m.u) is equivalent to:

* 10-23 g

402. Proton was discovered by:

Goldstein

403. The atoms of an element that have same atomic number but different mass number is called:

Isotopes

404. Hydrogen has isotopes:

3

405. Which of the following shell can accommodate 8 electrons:

L

406. The horizontal rows of elements in the periodic table are called:

Period

407. The vertical column in the periodic table are called:

Groups

408. First period of periodic table consists of:

elements

409. Elements of periodic table are classified in to:

4 block

410. 6th + 7th period of periodic table has:

32 elements

411. The type of chemical bond which is formed due to the complete transfer of electrons from one atom to another atom, is called:

Ionic bond

412. The type of chemical bond which is formed due to the mutual sharing of electrons is called:

Covalent bond

413. The process of changing a liquid in to a gas phase is called:

Evaporation

414. The homogeneous mixture of two or more substance is called:

Solution

415. The components of solution which is present in smaller quantity is called:

Solute

416. The component of a solution which is present in larger quantity is called:

Solvent

417. A solution containing maximum amount of solute at a given temperature is called:

Saturated solution

418. The addition of oxygen or removal of hydrogen during a chemical reaction, is called:

Oxidation

419. The addition of hydrogen or removal of oxygen during a chemical reaction is called:

Reduction

420. The symbol of copper is:

Cu

421. The symbol of sodium is:

Na

422. The symbol of potassium is:

K

423. Stomata are present in the cell of:

Epidermis

424. The bark cells contain pores, which are called:

Lintecs

425. The chest wall is humans is made up of how many pairs of rips:

12

426. At rest human breath:

16-20 times per minute

427. Most of the genius exchange in a leaf occurs through:

Stomata

428. Which organ is responsible for filtering the blood:

Kidney

429. A component of plant cell that is absent in animal cell is known as:

Cellulose

430. For lowering the body tube until the objective is 0.25 inches of the object we use:

Coarse focus

431. The smallest cells present in human body are:

Brain cell

432. The green pigment in the liars and stem of plants, that absorb sunlight for the process of photosynthesis is called:

Chlorophyll

433. As the specimen is in perfect focus we should turn the knob of:

Fine adjustment

434. The protective layer that covers the dermis is:

Epidermis

435. An example of organ in human beings is:

Heart, Lungs and Stomach

436. The system of our body that provides us with the basic frame work, structure, protection and movement is known as:

Skeletal system

437. Plant cells in which chloroplast is not present are called:

Root hair

438. In electron microscope, light source is replaced by a beam of very fast moving:

The part of plant that lays an important role in reproduction is:

Flower

439. DNA is a substance that makes up the foundation of:

Nucleus

440. A blood test that tells the number and shape of the blood cells is known as:

Blood smear

441. An example of organ in plant is:

Brain, Lungs and Stomach are not plant organs.

442. Food factory in plant cell, where chlorophyll is produced, is known as:

Chloroplast

443. A length of nerve cell is approximately:

1

444. The piece on microscope that focuses the light on the specimen is known as:

Condenser lens

445. Tissues present in the brain and the spinal as known as:

Nerve tissues

446. The smear shows the kind and number of:

Platinates count, Abnormally-shaped blood cell and White blood cells

447. The place of microscope that gather and focuses light on the specimen being viewed in known as:

Conducer lens

448. Example of single celled animal is:

Amoeba, Chlorella and Paramecium

449. The purpose of the flower is to attract insects for pollination and fertilization, so that they can build:

Seeds

450. The part of the plant that holds the plant in place is,

Stem

451. Plants and animals are unable to reproduce without the presence of:

Nucleus

452. The primary task of leaves is to absorb sunlight and make food by the process of:

Photosynthesis

453. Organisms made up of only one cell are known as:

Unicellular

454. The tissue responsible for the covering of internal organs and external tissue is known as:

Epithelial tissues

455. Ribosomes help in the formation of

Protein

456. Large storage for food, water and waste is present in:

Vacuole

457. A system that removes the waste materials from the body is known as:

Excretory system

458. Axon is a part of nerve cell that take the nerve impulse:

Away

459. A collection of tissues to provide a function is known as:

Organ

460. Epithelial tissue containing cilia are present in the:

Respiratory tract

461. Organs that involves in excretory system are:

Kidney, Ureter and Bladder

462. Cytoplasm consists of small particles which performs different function, these particles are known as:

Organelles

463. A group of organs that works together to convert food in to basic components for assimilation is known as:

Digestive system

464. The border of cell that allow some substance to enter is known as:

Cell membrane

465. A cell that transports oxygen from lungs to the body and carbon dioxide from body to the lungs is known as:

Red blood

466. Electrons are sub-atomic particles that rule the outer part of the:

Atom

467. The aorta is divided in to common iliac arteries that includes:

Hepatic iliac artery and Internal iliac artery

468. The function of renal arteries is to supply blood to:

Kidneys

469. The blood group system is discovered by:

Karl Landsteiner

470. If the blood group of a person is A then the antibodies present in that persons blood is:

Anti-b antibodies

471. The Rh-blood group system was discovered by Karl lands teenier in:

1930s

472. The clumping of cells in known as:

Agglutination

473. The person having antigen B on surface of RBCs has

Blood group B

474. The process in which there is utilization of nitrates by organisms is called:

Assimilation

475. The level at which an organisms feeds in food chain is called:

Trophic level

476. The process in which nitrates and nitrites are reduced to nitrogen gas by bacteria is:

Denitrification

477. Nitrogenous base adenine of one nucleotide forms pair with:

Thymine

478. What is present on the inside of double helix:

Phosphate- sugar- backbone

479. The characteristic or trait of cell or organism is made by:

Chromosomes

480. Nitrogenous base cytosine of one nucleotide forms pair with

Guanine

481. What is present on the outside of the double helix:

Nucleotides

482. Glands that have ducts are called

Exocrine glands

483. Major part of pancreas is

Ducted

484. A specific messenger molecule synthesized by an endocrine gland is:

Hormone

485. The image of distant object is formed on:

retina

486. Adrenaline is secreted by

adrenal gland

487. That factors that brings about certain response in organism:

stimuli

488. The cell division of mitosis is considered as means of

a-sexual reproduction

489. The process by which haploid daughter cells are formed by the division of diploid cells is called:

meiosis

490. The process of cell division in prokaryotic cells which is like mitosis is called:

binary fission

491. The phases of mitosis do not include

Division of vacuoles

492. The nucleus must migrate to the cell center in vacuolated cells plants:

Before prophase

493. In anaphase I of meiosis, the chromosomes contain one pair of:

Sister chromatids

494. The centrosomes are found by the

Duplication of centrioles

495. The time in cell cycle when the metabolic activity of cell is high, is classified as:

Interphase

496. The period of rest in which daughter cells enters after meiosis is

KVacuokinesis

497. The meaning of Greek word meioun is

To make smaller

498. The cell in which chromosomes are in pair are classified as:

Diploid cells

499. The places of meiosis in which sister chromatids are pulled a part and centromeres are cleaved is called:

Anaphase II

500. The way of asexual reproduction in plants is:

Vegetative propagation

501. The separate identical copies of chromosomes are formed at the:

End of anaphase

502. The meiosis is important element for

Sexual reproduction

503. The biologist August Weismann described the significance of meiosis for inheritance in:

1890

504. The apoptosis is classified as

Programmed cell death

505. The type of cell division in which cell is divided into two daughter cells is called:

Mitosis

506. The German biologist who discovered the meiosis process is:

Oscar hurting

507. The number of kinetochores fiber in metaphase that are attached to poles of chromosomes are:

2

508. The process by which cytokinesis occurs in animals cells is called:

cleavage

509. The division of cytoplasm is classified as:

Cytokinesis

510. The loose thread structure of genetic material present on muscles is called:

Chromatin

511. The spindle fibers are formed on the surface of:

Nuclear envelope

512. The centrioles are duplicated during:

Interphase

513. The set of spindle fibers formed in prophase are called:

Mitotic spindle

514. The second phase of cell cycle is called:

Synthesis

515. During cytokinesis in plants, the vesicles are moved to the middle of cell to form:

Cell plate

516. The number of phases in cell cycle are:

3

517. The example of organism which reproduces through budding is:

Hydra

518. The interphase is followed by:

Meiosis III and Meiosis I

519. The basis of development from single cell into multicellular body is:

Mitosis

520. The phenomenon in which segments of non-sister chromatids are exchange is called:

Crossing over

521. The cell in which spindle fiber are not formed during the division process are:

Prokaryotes

522. The life span of red blood cells is:

About 4 months

523. The phenomenon of death of cells includes

Necrosis and Mitosis

524. The female and male gametes get united to form:

Zygote

525. Symbiosis is a relationship between the members of:

Different species

526. Burning of petroleum products:

Sulphur dioxide

527. The process in which inorganic nutrients are enriched with water is called:

Eutrophication

528. Considering the Earths ecosystem, the consumers are classified as:

Heterotrophs

529. The lakes and forests are best classified as example of:

Natural ecosystem

530. The minerals are used as nutrients by:

Producers

531. Rhizobium lives in:

Root nodules

532. The main components of many biomolecules is

nitrogen

533. The landslides global warming floods and soil erosions are all the effects of

Deforestation

534. The examples of tertiary consumer or secondary carnivores are

Owl and wolves

535. ecology is the study of relationship of organism and their

environment

536. the concept of ecological pyramid was developed in

1927

537. 1bacteria belongs to

kingdom Protista

538. the information on heredity is carried by

DNA & RNA

539. the naming of organisms in scientific terms is known as

binomial nomenclature

540. fruit fly is known as

drosophila melanogaster

541. the cutting down tree is termed as

deforestation

542. Escherichia coli is a

bacteria

543. the basic unit of classification is

species

544. all the organisms share many biological

characteristics

545. the variety among species and within species is classified as

diversity

546. prokaryotic animals lie in kingdom

Monera

547. the branch of biology which focuses biological classification is called

taxonomy

548. the taxonomic categories are also known as

taxa

549. in the binomial nomenclature the second name represents

species

550. variation among the species or with in the species is known as

diversity

551. the name of the kingdom to which pea plant belongs is

plantae

552. a group of related species is termed as

genus

553. the characteristics of species includes

interbreed, fertile of spring and reproduction isolated

554. considering the biodiversity, the plants can be classified as

flora

555. cell wall of kingdom plantae organisms is made up of

cellulose

556. recently taxonomists divided the organisms into

5 kingdoms

557. the scientific name homo sapiens is used for recognition

human beings

558. protozoan resemble those animals which lack

chlorophyll and cell wall

559. the name of the scientist who divided nature in three kingdoms is

Carolus Linnaeus

560. according to binomial nomenclature the organism consists of two

names

561. the genus name to which pea plant belongs is

Pisum

562. the examples of organisms which possess animals like as well as plant like characteristics is

euglena

563. group of related families constitutes the

order

564. the name of the genus to which humans belongs is

homo

565. the breeding of same species produces

fertile off spring

566. Hazar Gangi national park is located in

Quetta

567. the scientific name of pisam satiuum is use to recognize

peas

568. plants make their own food because they are

autotrophic

569. virus is

infectious

570. the singular of taxa is

taxon

571. the allium cepa is the scientific name which is used for

onion

572. the human body to the kingdom named

Animalia

573. chiltan markhor has only habit left

hazargangi national park

574. the branch of biology which deals with classification and also traces history of evolution is known as

systematics

575. the name of the phylum to which humans belongs is

chordata

576. forests are regarded as valuable for its

aesthetic beauty, tourism & culture

577. in binomial nomenclature the part of the name which begins with capital letter is

generic name

578. considering the taxonomic hierarchy, the largest taxon is

kingdom

579. the species is known as group of

similar organisms

580. the major sources of energy to perform cellular functions such as exocytosis endocytosis movement and transmission of nerve impulses is

ATP

581. the summarized details of dark reactions are also known as

calvin cycle

582. the rate of photosynthesis increases with the

increase in carbon dioxide

583. in an aerobic respiration the pyruvic acid is not oxidized completely and turns into

ethyl alcohol

584. the reactions in second phase of photosynthesis that does not utilize light directly are called

dark reactions

585. the pigments other than cholophyth a present in the thylakoid membranes of chloroplasts are known as

accessory pigments

586. the two-carbon compound in which pyruvic acid is changed is called

acetyl coa

587. the site of occurrence of glycolysis is

cytoplasm

588. the direction of the force on a current carrying wire in a magnet field can be found by using

right hand grip rule

589. the magnetic field produced either by permanent magnets or by an electromagnet, called

Field coil

590. generators produce electric current due to the movement of wires near

very large magnets

591. an electrical switch that opens and closes under the control of another electrical circuit is called

relay

592. The information of users which are read by the ATM are stored on

magnetic strip on card

593. to control a large current with the help of a small current we use the

relay

594. the simple coil placed in a magnet cannot rotate more than

900

595. electric charges can be separated in to

Single type

596. magnetic be separation

cannot be separated

597. it is made of many loops mounted on a shaft or axle

armature

598. in a practical electronic motor, the coil is called

armature

599. electric motor is a device which converts energy into

rotation kinetic energy

600. in a DC motor the coil in a magnet rotates maximum to about

900

601. in the secondary voltage is larger than the primary voltage the transformer is called

step up transformer

602. the force on the wire is at right angle to both the direction on the magnetic field and the direction of the current this is discovered by

ampere

603. in transformer the changing current in primary coil induces changing magenetic field is

secondary coil

604. the magnetic field produced near the current carrying conductor is

stronger

605. magnetic effect of current is called

electromagnetic

606. the production is induced current in one coil due to production of current in neighboring coil is

mutual induction

607. weak ionic current in our body that travels along the nerve can produce the

magnetic effect

608. electric motor works on the principle of

torque

609. the speed of sound varies with

humidity and Temperature

610. in a transformer the primary coil is connected to

AC source

611. multiple reflections are called

reverberation

612. the wavelength of ultra-sonic waves is

very small

613. human voice results from the vibration of

vocal chords

614. as compare to air sound waves travel

5 times faster

615. sound which has jarring effect on ears is

noise

616. we can see sound waves by using

oscilloscope

617. pitch of the sound depends upon

frequency

618. A human ear cannot hear a sound of frequency less then

20 hz

619. sound of frequency higher than 20,000hz which are inaudible to normal human ear are

ultra-Sonics

620. the speed of sound varies with

humidity and temperature

621. sound waves are produced by

vibrating bodies

622. sound waves are produced by

vibrating motion

623. the sensation of sound persist in our brain for about

0.1s

624. the number of vibrations of a body in one second is called

frequency

625. time taken by simple pendulum to complete one cycle is called its

time period

626. the memory which starts the computer is

ROM

627. INFORMATION SENT BY CELL PHONE ARE IN THE FORM OF

ELECTERICAL SIGNALS

628. 1GB is equal to

1024 MB

629. THE most important piece of hardware is the

central processing unit (CPU)

630. the term soft-ware refers to

computer manuals and computer programs

631. a small storage device that can be used to transport files from one computer to another is called

flash drive

632. the temporary memory of computer

RAM

633. THE MEDIUM which sends the signals from source to destination is known as

transmission channel

634. a compact disk CD can store computer data over

680 mega bytes

635. a spherical mirror whose inner curved surface is reflecting is called

concave mirror

636. a compound microscope uses

lenses

637. the lens which is thick at the center but thin at the edges is called

convex lens

638. concave mirror is also called

converging mirror

639. human eye act like a

camera

640. a magnifying glass from

virtual image

641. the colored portion of eyes that controls the amount of light reaching the retina is called

iris

642. a point on the principal axis at the center of lense is knows asa

optical center

643. the lens which is thin at the center and thick at edges is

concave lens

644. the quantity which does not changes during refraction is

frequency

645. in human eye the image is formed

on retina

646. light enters the eye through a transparent known as

cornea

647. when light travelling in a certain medium fall on the surface of another medium a part of it turns back in the same medium this phenomenon

reflection

648. the inability of eye to see the objects clearly is called

small image

649. the less with a long focal length is

both b and c

650. the variation of focal length to form a sharp image on retina is called

accommodation

651. the number of protons and neutrons in the nucleus is

atomic mass number A

652. in nuclear fission as compared to the original mass of the heavy nucleus the total mass of the product is

less

653. a stream of high energy electrons is the

beta radiation

654. the elements which emit natural radioactivity are known as

radioactive elements

655. a helium nucleus comprising of two neutrons with a charge of 2e is

alpha particle

656. the positive charge in atom was concentrated in a small region called

nucleus

657. fission and fusion are called

nuclear reaction

658. if the velocity of a body becomes double then its kinetic energy will

become four times

659. when two light nuclei combine to form a havier nucleus the process is said to be

nuclear fusion

660. a temperature rise in the environment that disturbs life is called

thermal pollution

661. the interconversion of matter and energy is predicted by

Einstein

662. one horse power is equal to

746 watts

663. the energy possessed by a body due to its position is called its

potential energy

664. a car moving possess

mechanical energy

665. the energy stored in a coal is

chemical energy

666. plant or animals wastes that can be burnt as fuel is called

biomass

667. torque is turning effect of

friction force

668. a couple is produced by

two unlike parallel force

669. the sum of two or more forces is called

resultant force

670. the perpendicular distance between the axis of rotation and the line of action is called the

moment arm

671. if nonet force is applied on a body then it is said to be in

equilibrium

672. the torque depends upon

force and moment arm

673. moment arm is the

perpendicular distance

674. The mass packed in a unit Volume is Called?

Density

675. The derived S. I Unit of density is?

676. Density x Volume =?

Mass

677.

Rate of Petrol consumption

678. The Distance traveled in ___ time is called Speed?

Unit

679. Distance Travelled by Light= 149,000,000km, Time taken by light= 8min, 16.7 sec, Speed of Light?

299979.87 km/s

680. Velocity?

Distance moved/time

681. Unit of Acceleration?

682. The Velocity of a car changes from 10m/s to 50m/s within 10 seconds, find its acceleration?

4m/s2

683. A Hypothesis is a?

Prediction

684. The formula of Pressure?

Force/ Area

685. Find out the pressure of a block having 200N force on an area of 4m2?

50N/m2

686. ___ is a system in which machines are powered by Liquid Pressure?

Hydraulics

687. The break system of your car is a ___?

Hydraulic System

688. The machine operated by the pressure of gasses are called?

Pneumatic Machine

689. The piston of Pneumatic Drill squashes gas inside and produce as very___ ?

High Temperature

690. The first aerosol was invented in Oslo in?

1926

691. The natural heat energy trapped underground is called ___ energy?

Geothermal

692. Fire Alarms have a?

Bimetallic Strip

693. When water freezes to ice, its volume increases by?

10%

694. The expansion of water and cooling from 4 to 0 is known as___ of water?

Ana-Molous Expansion

695. The average temperature of the human body is?

36.9

696. The expansion and contraction of solids and liquids can give rise to?

Tremendous Force

697. The Property of expansion & contraction of liquids with change of temperature is used in?

Thermometer

698. Lenses are shaped, so that the light passing through them bends in a?

Particular Way

699. The center of the spherical surface is known as the center of ___?

Curvature

700. The Center of the Lens is known as__?

Optical Center

701. An image which cannot be obtained on the screen is called a?

Virtual Image

702. The location and nature of the image formed by a lens can be traced easily through a?

Ray Diagram

703. The outer most protective layer of eye is called?

Sclerotic

704. The space between the lens and cornea is filled by a fluid called?

Aqueous Humor

705. The space between the lens and retina is filled by another fluid called?

Vitreous Humor

706. The first current generator was made by Alosio Galvani in?

1780

707. The first source of electricity ever developed was based on a?

Chemical Reaction

708. One Kg of Nuclear Fuel contains nearly three million times energy obtained from 1 kg of?

Coal

709. A direct current electricity source of a specific voltage used primarily in small circuits is known as?

Battery

710. The first women to have travelled in space was___?

Tereshkova

711. Gravitational Forces of the earth affect human body, when space crafts leave the?

Ground

712. Namira Saleem is the first Muslim (Pakistani) astronaut, who has been selected out of 4000 aspirants to travel in space in___?

2008

713. Nephrology is a branch of science which deals with the study of?

Kidney

714. Anti-diuretic hormone is called?

Vasopressin

715. A change in hereditary material is called?

Mutation

716. Chromosome means?

Colored Body

717. The Deficiency of Insulin causes?

Diabetes