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1.
CAPE Biology Unit Paper June 2 7
4.
The diligranl below shows the stru
atriglycrlde.
2.
One of the roles ofwatei'
in:J~~sUis
is~~~ffl~.~~ium
in blood.
Which of the ollo';ng
properties of
water
.acc:ountsfor this role?
A
(B)
High specific heat capacity
Strong cohesive forces between
molecules
High heat ofvaporisation
Solvent for
po r
molecules and ions .
.no
~
i
HC
X
-C
~
I
0
H
11-C
-
X
-C ~
I
0
II
e
x e
~
Which of the following represents
labelled X?
(A)
N
I
H
(B)
c
i
OH
C)
(0)
c
il
0
s.
The diagram below shows a
ring
structure of
glucose.
CLOH
j~
,
I
Which of the following correctly n
type of bond represented
by
the br
- in the diagram above?
A Ionic bond
(B) Hydrogen bond
(C) Hydrophobic bond
(0) OisuJphidebond
I
H
I
OR
Which of the following indicates the fonn of
glucose and in which molecule it is present?
f ~Vbe ~
,
j p.-esent
j Cellulose
iStarch
i Ceiiulose
I starch
glucose
I
This figure below is part
01
a growing
polysacchlL-ide
.ohain.
~
X
The name of the bond labelled X is
A
(B)
(C)
(0)
glycosidic
peptide
hydrogen
diester
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2007
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6. Food tests were carried out on four different solutions.
Which of the follow.ingcombinations shows the solutions that contained
only starch and sucrose?
Su ii~aUa
Biuret
Acid HytL-u ysis
Iodine in
- 1
hen Benedict:'s
Pota5shun
Test
Iodine
(A)
x
(B)
x
. . ,
x
I
e)
: II ; .
x
I
0)
x
x
.,
,
lit=negative result
.=
ositive result
7. Thefollowingisanelectron
znicrograpb of a section of' an animal cetl.
I V
(from
Advanced Biology -
Roberts.
p.44)
Which of the structures labelled I, n. nI and IV isconcerned with protein
synthesis?
(A) I
(B)
n
(C) III
(D) IV
45
III
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2007
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8.
Which of the
following
is NOT a
function of
the Golgi apparatus?
9
Whichof the following. labelled I to
r v .
give
the correct
site
where xylem tissue is found
ina diotyledonous stem?
(A)
(B)
..(C)
D)
Lipidsynthesis
Manufacture of'lysosomes
Packaging
of glycoproteins
Membrane formation
w. _ ~ .
A~lr----n
= f f i
(A) I
(8) Il
(C) III
(D) IV
L%-+---IV
Item 10
refers
to the following figure which shows four types of tis-sue in cross section.
M
N
o
10. Which of the following combinations
correctly identifies the phloem and xylem
tissues?
A
I)
p
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n.
W h i c h
of
th e
following
cell s
is represented,
1 3.
by th e
diagram
b elo w ?
(A) Neurone
(B) Plantcell
(C) B acteriu m
D) Sperm
12.
Which of the following identifies the
structure repr ese n ted by X in the diagram
be low ? . -
(A) Channelprotein
(B) Cholesterol
(C) Glycoprotein
(0) Extrinsicrotein
Four identical samples of plant tissue are
p laced in four different solutions. Each
sample of
plant
tissue has
a
w ater
potential
of 800 kPa. In which solution would full
plasmo ly sis occur \\it hi n t he ti ss ue ?
T oe soiution of
(A) - 300kPa
(B) - 500kPa
(C) - 800kPa
(D) -llOOkPa
14.
Which of the following pairs of statements
explains the mode of action of enzymes?
1. They are globular proteins and as
re s ul t a re s ol ub le.
II. Theybond to the substrate molecule
at their active sites.
Ill. They break down substrate
molecules int o products.
N.
T h ey lo w er th e ac ti va tio n e ne rgy to
th er ea cti o n .
(A) I andIIonly
(B) IIandill only
C ) n and IV only
(D) illand IV only
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l1an...l5 refers to the diagtam below which represents the activation energy for an enzyme-catalys
and
an un~teaction.
Progress of reaction (time)
15. The activation energy for an enzyme-catalysed
reaction is represented by the region labelled
(A) I
(B)
n
(C) In
(0) IV
16. Thegraphbelow shows the time course of the
activity of the enzyme sucrase at various
temperatures.
t
'Quaalily
t c ~ ~
Iprodud sr c
formed
v::
= Time
miD
60
At which of the following temperatures does the
enzyme work at the FASTEST rate?
(A) 10
O C
(B) 2S
C
(C) 37
C
(0)
600C
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49
17.
18.
~ refers to the diagram below which
shows atypical portion of the DNAmolecule
ofthe chromosome. i
Widthlmm
'vllich of the following
i~
1'.JOTrepresented
try the region labelled X?
(A)
(B)
(C)
Hydrogen bonds between base pairs
Two anti-parallel strands
Pyrimidine to pyrimidine base pairing
{Dj
Which of the following events occurs in
transcription aswell as inreplication of ONA?
(A)
(B)
(C)
0)
Free nucleotides bond to the DNA
strand.
Two new DNA molecules are
produced.
Uracil nucleotides bond toadenine on
the DNA strand.
Only part of the DNA molecule
containing agene unwinds.
19.
'Theamino-acid sequence
leucine-ly$ine-valiJle
occurs ina portionof apolypeptide molecule.
The table below shows the DNA codes for
these amino-acids.
IVallne
I
CA.J\
OAA
Transfer RNA molecules with anticodons
- needed for the synthesis of this polypeptide
lUe
(A)
(B)
(C)
0)
GAA
GAA
CUU
CUU
TIT
UUU
AAA
UUU
CAA
CAA
GUU
GUU
20.
One structure that may be observed in
animal cellsduring mitosis but isNOT se~n
in plant cells is
2
(A) spindle fibres
(B) centromeres
(C) centrioles
(D) chromatids
Which of the following statements correctly
describes homologous chro-oosomes?
L
II.
They are the same length.
They are held together by
centromere.
They m.v dle same gene loci.
They bave identical alleles.
HI.
IV.
(A)
(B)
(C)
D)
r, n
and
m
only
iandiUoniy
I, ill and IV only
rn
and IV only
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22.
Which of the following combinations
correctly represents the chronological order
of the events occuring in meiosis?
Item 24 refers to the diagram below whi
shows the longitudinal
section of part o
flower.
I-I---i
24. The micropyle and funicle are represent
by
(A)
(B)
(C)
(D)
I and V
II and V
ill and IV
IV and V
J
a. hromatid pairs line up at right-
angles to the equatorial plane.
Homologous chromosomes are
pulled apart
by
spindle fibres.
Chiasmata form
between
chromosomes of'the'bivalents,
Individual
chromatids
migrate to
poles,
Chromosomes
shorten and thicken
and appear as pairs of chromatids.
II.
III.
IV.
v.
(A)
(B)
(C)
(D)
I, III, IV, n,V
III, V, II.
r v
I
V, I. II,
m
IV
V , H I, I,
n
IV
Item 23 refers to the diagram below which
shows
a pollen grain,just
prlorto germination.
23.
A
a
diploid
tube
nucleus and
a
haploid
generative nucleus
(B) a
diploid
tube
nucleus and a diploid
generative nucleus which divides
into two gametes
(C)
a
haploid tube nucleus and a haploid
generative nucleus
(D) a haploid tube nucleus and a diploid
generative nucleus which divides
into two gametes
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2007
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51
5
The following diagram shows the formation
of gametes in a carpel of a flowering plant.
27.
One
feature
that
is
common to
both sperm,
(male gamete) and egg (female gamete), is
Flower [2n]
I
arpels
Embryo sac mother cells
I I l
~
Embl:1lO sac
(A) adiameter of approximately lOOIIDl
(8) the
abundance ofmitochondri ' .in
the
cytcpia ilm
(C) ahaploidnucleus
(0)
afoodstore
28.
The foliowing list represents some stages in
the p.:e5S of fecti.l.ization:
~
/
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2007
9/12
o .
11w
colo ur
in a
certain
species of plant
n
b e
white, light pink or dark pink. There
two b y po theses to explain this:
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1tm..3l
below shows the inheritance of
recessive allele 'a' that causes a geneti
disorder which appears in the doubl
recessive
form., 'sa',
Hypothesis 1: There are two co-dominant
alleles.
n thesis 2: There are
t hr ee a ll el es ,
one
fo r
each flower
colour.
n 1 h y po theses ca n B E S T be te-sted
by
(A) analysing the flower pigments in
several different flowers using
chromatography to find out
whether someplants contain more 32.
than one pigment
(D)
controlling cross-pollination of
the
different varieties. in
all
possible
com b inations,
and recording the
co lo u rs S h o w n
by
ili~
I)ffspring
(C) controlling self-pollination of many
individuals of each colour variety
and recording the colours shown
y th e
ffspring
o f
each individJ 33.
pI
nt
sa m pl ed
() urv ying large wild populations
, nd o m ly an d findin g the ratios of
III d Iferent colour in these
u l 1I0M
31.
'l'wo p rent, bolb of blood group A, have a
8011
of blood group A. Tho probability that
their next child will have blood group 0 is
(A)
B)
(C)
(D)
0.25
0.375
0.50
0.75
nr
I
~ --r---IO
3
4
5
6
2 ,
7
Which females are heterozygous f
the i so r er
(A) 30nly
(B) 5on.'y
(C) 3and 5 only
(D) 3,5 and 7
Which of the following does ~~OTcau
A ) . R csh U l 1 lin g o f genes
(B) M u t a tion s o f chromosomes
(C) Random fertilization
(D) Petrification of genetic material
34.
Which of the following increases the numb
of different alleles
ill
a population
organisms?
(A)
(B)
(C)
(D)
Crossing over
Gene mutation
Random fusion of gametes
Reassortment of chromosomes
meiosis
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35. Inthehereditary disease, sickle-cell anaemia.
the
amino acid, glutamic acid. found in
normal haemoglobin. is substituted at a
particular location by the amino acid
valine.
The codon for glutamic acid
is
QAA. The
codons for valine can be either GUU. GUC
or
OUA. One
single. ~ alone
is
changed
during themutation. Which oCthefoUowing
would be the corresponding DNA nucleotide
responsible for the change?
(A)
(B)
(C)
(D)
CAA
CAT
CAU
CAG
36.
In the Caribbean. sweet potato plants are
propagated asexually by tubers, Twenty
tubers collected from one plant were grown
to produce 20 second-generarion
plants. All
the tubers from these second-generation
plants were collected,weighed and their mean
weight calculated. Twenty tubers closest to
themean weigbtwere grown under the same
circumstances as before. All the third
generation tubers were collected, weighed
and their mean weight calculated.
Compa.-ed to the second-generation tubers.
the third generation
tubers
have
(A) a greater mean
weight
and increased
genetic variation
(B)
a
greater mean weight. and
(C) an unchanged mean weight and
reducedgenetic variation
..(0) an unchanged mean weight and an
unchanged genetic variation
Animai.ia
Item 37 below shows the classification scheme for fOUTspecies of monkeys.
Choidata
.
r--. ~ I - - - - - - _
M.n; lia
I
Primates
I
I
Cercopithidae
I
Cenop\thegJS
-J iq25
greeu monkey
Co~us
I
Colobus badius
~
_l_Ir __ n
rye,=_
black _d wbite a)lobus
37. Which of
the above represents the genus to
which
the green monkey belongs?
(A) Mammalia
(8) Primates
(C) Cereopithidee
(0) Cercopithecus
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tre of the hypotheses in the theory of
nutur Iselection are:
r .
Individuals may differ from one
another as a result of chance
variation.
If.
More offspring are born than can
survive and reproduce.
III. There is a struggle for existence
between
the individuals
and
their
environment.
from these statements, which of the following
the MOST iikely deduction?
(A)
The number of individuals in the
environment increases with each
generation.
The individuals best ;;uited to the
environment' are those with the
lea.stvariation.
The
individuals
with
variation are
hybrids, sterile and are
unsuccessful in the struggle.
The individuals which cope with the
struggle have variations suited to
the environment.
5
Ii)
( )
(0)
39.
Speciation is the process
by
which new
species
arise. Which TWO
of the following
ways, listed 1to IV, BEST promote this?
I.
Organisms
produce
large
numbers o
progeny.
A
local population
becomes
isolate
fr-om the main
'bulk
of th
population.
The isolated genome experiences
favourable
mutation.
The individuals in a
populations
a
iC-enticala.'X donotshowvariatiO ',S
in their cherecteristics,
i
III.
IV.
(A)
(B)
(C)
(D)
I and
rr
I and IV
nandm
Jl and IV
4 . (
idcr the following kingdoms:
I'ungi. Prokaryotes, Plants. Protoctists
tch EACH organism below
wit.~
the kingdoms above.
KINGDOMS
I
Protoctists
uo i Prokarvotes Plants
(B)
Breadmould I Bacterium
Moss
I
Breadmould Bacterium
Moss
I
Alga
Alga
largest
(A)
9)
( )
(0)
order class
phylum class
class order
phylum order
ph,yhun
order
phylum
class
(C)
Alga Moss
(0) I
Breadmould
I
Bacterium
. Which
of
the
following combinations
is the correct hierarchical sequence of the
taxonomic groups?
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Item 42 refers tothe the diagrams below which illustrate a variety
ofleaf shapes found in nature.
42.
Which of the leaves above would be grouped together in a
classification scheme?
(A) land II
(B) I andIV
(C) II and III
(D) III and IV
43
in situ
conservation of an endangered
. ?
species.
of deforestation in tropical
areas?
(A) Destruction of tree; ~Jyatmospheric
(A)
(B)
(C)
(0)
Botanic garden
Sperm bank
Forest reserve
Seed bank
(B)
pollution
Replacement of native trees with
fast-growing species
Cutting trees
for timber
used in th
C)
0)
Dynamiting and other activites
involved
in
quarrying
for minerals
4.
Which of the following isNOT a conservation
aim when zoos are established?
A
Species canbe bred
in
captivity
and
then re-introduced into theirnaturaJ
habitat
(B)
Species can
be
kept
in
conditions
favourable for breeding
(C)
Species are protected from their
natural predators
(D)
Species held incaptivity may inbreed