Unit 2 Cells and multicellular organisms

1 of 12

© Cengage Learning Australia Pty Ltd 2015 BIOAC11PE00017 www.nelsonnet.com.au

1 of 12

Name:

Class:

Unit 2 Cells and multicellular organisms

Unit exam

Time permitted: 70 minutes

Section Number of questions Marks available Marks achievedA Multiple choice 30 30B Short answer 8 50

Total 38 80

Grade:

Comments:

BIOAC11PE00017.indd 1 09/02/15 8:03 AM


2 of 12

Section a multiple choice (30 marks)Section A consists of 30 questions, each worth one mark. Each question has only one correct answer. Circle the correct answer. Attempt all questions. Marks will not be deducted for incorrect answers. You are advised to spend no more than 30 minutes on this section.1 The study of bacteria was enhanced with the invention of the electron microscope. This is because:

a the electrons used can penetrate tough bacterial cell walls.

B bacteria are so small.

C bacteria are difficult to capture in an image as they move so quickly.

D bacteria could now be classified according to the organelles present.

2 Which of the following would determine whether a cell is from a prokaryote?

a Presence or absence of a rigid cell wall

B Presence or absence of internal membranes which partition the cell

C Presence or absence of cellular metabolism

D Presence or absence of DNA

3 How large a cell can be is limited by:

a the surface area needed to exchange materials with the surroundings.

B the number of organelles that can be packed inside.

C whether there is enough materials to build it.

D the amount of nutrients it needs to survive and function.

4 Mitochondria are organelles found in eukaryotic cells. These organelles are responsible for:

a the transport of proteins within the cell

B synthesis of lipids

C photosynthesis

D cellular respiration

5 If a cell had a large Golgi apparatus, it would suggest that the cell:

a produces a large amount of ATP.

B secretes a large amount of a product of the cell.

C stores a large amount of a product of the cell.

D moves a lot.

6 The cell theory does not apply to which of the following groups?

a Bacteria

B Fungi

C Viruses

D Algae

BIOAC11PE00017.indd 2 09/02/15 8:03 AM


3 of 12

7 A white blood cell engulfing a pathogen, such as a bacterium, is an example of:

a endocytosis.

B exocytosis.

C passive transport.

D diffusion.

8 If a substance is more concentrated inside a cell than its surroundings, which of the following processes could produce a net movement of that substance into the cell?

a Diffusion

B Osmosis

C Facilitated diffusion

D Active transport

9 Which of the following statements about the phospholipid molecules in the plasma membrane is incorrect?

a The phospholipids form a bilayer.

B Each phospholipid molecule has a single hydrophilic head.

C The phospholipid heads are hydrophilic (able to absorb water).

D The phospholipid heads are hydrophobic (water avoiding).

10 Which of the following proteins is not found embedded in a plasma membrane?

a Adhesion proteins

B Intra-membrane proteins

C Transport proteins

D Receptor proteins

11 Which of the following act as markers on the surface of the cell, are called antigens and are unique to each individual?

a Glycolipids

B Phospholipids

C Glycoproteins

D Glycocarbohydrates

12 Which of the following is an example of a catabolic reaction?

a Joining of amino acids to form proteins

B Synthesis of cholesterol

C Starch breaking down into sugar

D Production of ketones

BIOAC11PE00017.indd 3 09/02/15 8:03 AM


4 of 12

13 The molecule that an enzyme reacts with is known as:

a a coenzyme.

B a cofactor.

C a substrate.

D a catalyst.

14 The rate of a chemical reaction can be increased by:

a adding a catalyst.

B cooling the reactants.

C decreasing the concentration of the reactants.

D increasing the pH of the solution in which the reaction is taking place.

15 Which of the following organisms would undergo cellular respiration?

a a zucchini plant

B a bacterium

C a cat

D all of the above

16 In cellular respiration, the first stage is known as glycolysis. Glycolysis uses ________________ to produce ____________________.

a glucose; pyruvate

B pyruvate; glucose

C oxygen; glucose

D oxygen; pyruvate

17 Which of the following wavelengths tends not to be used by plants for photosynthesis?

a red light

B green light

C blue light

D all wavelengths are used

18 Yeast uses the process of fermentation to break down sugars. When in a bread mixture, the fermentation by the yeast produces __________, which causes the bread to rise.

a carbon dioxide

B ethanol

C water

D oxygen

BIOAC11PE00017.indd 4 09/02/15 8:03 AM


5 of 12

19 A paramecium is a simple unicellular eukaryote which contains a contractile vacuole. The contractile vacuole:

a produces chlorophyll for photosynthesis.

B is a photoreceptor, which detects changes in light.

C eliminates excess water.

D gathers organic nutrients such as algae.

20 Which of the following is not a function of epithelial tissue?

a Protection against mechanical injury

B A barrier to stop fluid loss

C Control of contractions in the tissue

D Secretion of mucus

21 Which of the following is not a type of connective tissue?

a Adipose tissue

B Cartilage

C Compact bone

D Cardiac muscle

22 Which of the following plant tissue allows a plant to grow throughout its life?

a Meristematic

B Dermal

C Ground

D Vascular

23 Which of the following correctly traces the path of blood from the heart to a toe and back to the heart again?

a Right atrium, aorta, toe capillary, pulmonary vein, left atrium

B Left ventricle, pulmonary artery, toe capillary, vein, right atrium

C Right ventricle, aorta, toe capillary, vein, right atrium

D Left ventricle, aorta, toe capillary, vein, right atrium

24 Which of the following is correct for a normal human heart beat?

a Both right chambers contract together, then both left chambers contract together.

B At any given time, either the atria or the ventricles are contracted.

C Both atria and ventricles contract together and relax together.

D There are four separate contractions: left atrium, left ventricle, right atrium, right ventricle.

BIOAC11PE00017.indd 5 09/02/15 8:03 AM


6 of 12

25 Which of the following is a function of the lymphatic system?

a Collects liquid that has been lost from the circulatory system

B Transports red blood cells back to the heart

C Defends the body against disease

D Maintains the correct pressure in the blood

26 Which of the following is not likely to be present in a herbivore?

a Rumen or caecum

B Bacteria in the gut

C Long large intestine

D Canine teeth

27 Which of the following is not a function of the mammalian kidney?

a Filtration of water and solutes from the blood

B Filtration of large proteins and red blood cells from the blood

C Excretion of nitrogenous waste

D Reabsorption of water, sodium and calcium ions

28 Which of the following is not true about plant vascular tissue?

a The vascular tissue in leaves is found in the veins.

B In stems, the vascular tissue creates vascular bundles.

C Phloem cells are hollow, non-living and transport water and sugars.

D Xylem cells are hollow, non-living and transport water and minerals.

29 The majority of photosynthesis occurs in which structure(s) of a leaf?

a Upper and lower epidermis

B Palisade and spongy mesophyll

C Parenchyma

D Collenchyma and sclerenchyma

30 Which of the following plant structures is responsible for the transport of organic nutrients from the leaves to the roots?

a Xylem

B Phloem

C Sclerenchyma

D Parenchyma

BIOAC11PE00017.indd 6 09/02/15 8:03 AM


7 of 12

Section B Short answer (50 marks)Section B consists of 8 questions. Write your answers in the spaces provided. You are advised to spend 40 minutes on this section.1 There are four major types of biomacromolecule. Name two of these and complete the following table.

(6 marks)

Name Subunit Example of a cellular function

2 a Red blood cells do not gain or lose water when they are placed in a 0.9% NaCl solution. What term is used to describe the concentration of the solution compared to the concentration of the red blood cells? (1 mark)

b State whether the following solutions would be considered hypertonic or hypotonic to red blood cells. (2 marks)

i 15% NaCl

ii 0.001% NaCl

3 a Name two processes that occur in either plant or animal cells which require the use of enzymes. (2 marks)

b List two environmental factors that can change the activity of an enzyme. (2 marks)

BIOAC11PE00017.indd 7 09/02/15 8:03 AM


8 of 12

c Advertisements for washing powder sometimes promote the product’s inclusion of enzymes, which are reported to boost its power. Suggest why enzymes are added to washing powder. (2 marks)

d The instructions for using these washing powders recommend a wash of ,40°C. Suggest what would happen to the enzymes if you used a hot wash of ,85°C. (1 mark)

4 The diagram below shows a section through a leaf.

a What is the name of the opening labelled ‘A’? (1 mark)

b What is/are the function(s) of the opening labelled ‘A’? (2 marks)

c What is the name of the cells labelled ‘B’? (1 mark)

A

B

C

BIOAC11PE00017.indd 8 09/02/15 8:03 AM


9 of 12

d What is the function of the cells labelled ‘B’? (1 mark)

e What is the name of the group of cells labelled ‘C’? (1 mark)

f What is/are the function(s) of the group of cells labelled ‘C’? (2 marks)

5 a Write a chemical equation that summarises the process of photosynthesis. (2 marks)

b Photosynthesis is divided into two distinct stages. Complete the following table about these stages.

(4 marks)

Name of stage Site within a chloroplast

c Suggest two ways of improving the rate of photosynthesis in some tomato plants that are grown in a greenhouse. (2 marks)

6 a The kidney is responsible for the excretion of nitrogenous waste in mammals. Name the main nitrogenous waste for mammals. (1 mark)

BIOAC11PE00017.indd 9 09/02/15 8:03 AM


10 of 12

b There are about one million functional units in the kidney, where the processes of filtration, absorption and secretion take place. Name the functional unit of a kidney. (1 mark)

c Describe the processes of filtration, including the site where filtration occurs. (3 marks)

d The following table shows the composition of various substances within a mammalian kidney. Complete the table by filling in estimated values for glucose and protein in a properly functioning kidney. (2 marks)

Substance (g/100 mL) Plasma (g/100 mL) Filtrate (g/100 mL) Urine (g/100 mL)Glucose 0.15

Protein 7.00

Salts 0.65 0.65 1.2Nitrogenous waste 0.03 0.03 2.5

e Explain your values for glucose and for proteins. (2 marks)

BIOAC11PE00017.indd 10 09/02/15 8:03 AM


11 of 12

7 The diagrams below show two types of vascular tissue in plants.

a Which of the above tissues transports water from the roots to the rest of the plant? (1 mark)

b Name one of the factors which causes water to move from the roots to the leaves. (1 mark)

c What is the main function of the other tissue (that you did not choose in 7a)? (1 mark)

d Vascular tissue is one type of plant tissue. Name one other plant tissue. (1 mark)

8 a Cellular respiration occurs in two stages. Where in a cell does:

i stage one occur? (1 mark)

ii stage two occur? (1 mark)

Companion cellwith densecytoplasm

Tissue A Tissue B

Lignin

Sieve plate

Sieve tube

BIOAC11PE00017.indd 11 09/02/15 8:03 AM


12 of 12

b How does the production of energy in a cell compare between when it undergoes aerobic and when it undergoes anaerobic respiration? (1 mark)

c What are the product(s) of fermentation in:

i a plant cell? (1 mark)

ii an animal cell? (1 mark)

BIOAC11PE00017.indd 12 09/02/15 8:03 AM

Date post:	07-Apr-2022
Category:	Documents
Upload:	others
View:	4 times
Download:	0 times

Unit 2 Cells and multicellular organisms

Documents