8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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CAPE Biology Unit Paper June 2 9
L
Sucrose makes a good transport molecule as
seen in phloem tissue, because it is a
An important propertyof cellulose is its ability
to
3
(A)
disaccharide madeupoftwogiucose
molecu les
disaccharide made up of glucose and
galactose
(A) readily go into solution
(B) act
as
a fuel
s tore
in plants
(C) . readily combine with 0: glucose
CD) form structural components in
plants
(B)
(C) very reactive molecule chemically
and therefore combines easily with
water
0
very
soluble molecule and
can
therefore be moved efficiently in
high concentrations
The arrangement of the polypeptide strands
in collagen isBEST described as
A
. . .
(A)
a
triple helix
(B) an u-helix
(C) a double helix
tT I)
a
J3 -heiix
~ refers to the structures below which
show two isomers of glucose.
I
n
CHpH
tl J-.-----. n AU
'//1. -\.
';'U
H \j
'\.
nu q .
I '--T~I
OHr
I
H
H OH
1
. .
Which ofthe following statements is NOT
tru e abou t
bo th
isomers?
(A) Both have side groups attached to the
first carbon in identical positions.
(B) Both are hexose sugars with the
same chemical formula.
(C) Both formpolysaccharides butwhich
diff er in their properties.
(D)
Both arc soluble in water and can
exist in an open chain form.
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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Item
5 refers
to tests performed
by
students to identify food
substances present in a
solution.
The
tests
were
can:ied
out
and their respective
results are
sho~jn
the table below.
i . Test I Result
I Riuret test IPurple colour was obtained.
Benedict's
test
I
Blue
colour remained on neating.
Diiutc hydrochloric acid was added and the I Blue colour became brick-red on
mixture
was boiled, allowed to
cool,
neutralized heating.
and Bcnedict's tcst was carried out.
~
Whl h nflh('
foll,)witl15
indicates the food substance(s) present in the students' solution?
\ A ) I Ilt,1.
1 (11
'11I
(II)
N,1Il I
lu
II)
sugar only
) II
tllllIl IOd non-reducing sugars
(I
I N,H,I
du
'inll
sugar and protein
diagrammatical representation of a
phospholipid molecule.
What do X, Y and Z
l - x - - , - - -
Z
,---------
i
I
LJy
I GlYCer ._.J~h;-O_SP,-h~.~-= t_e_ . _ . _ r - I
: : . F _ a t t y
a~d
iFa~id
i Glycerol j Phosphate
Fatty acid ; Phosphate I Glycerol
I-Phosphate I Glycerol i Fatty acid=----l
______ -L __ I -
(A~
,
(
)
0
7. Inthe
chloroplast, light energy is trapped in the
(A) stroma
(B)
thylakoids
(C) envelope
(D) starch
grain
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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Which organelle is involved in cytokinesis in
plant cells?
Item 11 refers to the diagram below.
(A)
B
e
(D)
Golgi apparatus
X External
Endoplasmic reticulum
Internal
surface
Centriole
Chloroplast
Item 9 refers to the diagram below which
shows a transverse section of a plant
structure.
11.
The structure labelled X is
(A) channel protein
(B) cholesterol
(C) extrinsic protein -
(D) glycoprotein
Item 12 refers to the following diagram.
Poiaramino
acid
9
o
I
~ i
.
. . . . . . - .
A r
-
\
'-'
~
Polar amino
acid
Which of the following bonds is T {1 T esen ted
by the broken lines (-) in the diagram above?
The area labelled X represents
(A) acell
G~) a tissue
(C) an organ
(D) a system
10.
Materials are moved in and out of cells by
various
mechanisms. Which of the following
mechanisms are affected
by
respiration?
12.
I.
II.
IIl.
rv
Facilitated diffusion
Osmosis
Active transport
Exocytosis
(A)
(B)
(C)
(D)
Ionic
Double
Peptide
Hydrogen
(A) 1and III only
(B) III and IV only
(C) I,lliandIVonly
(0) II, III and IV only
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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T
IT
T> T T'C1
I
&
. .. ..
&.LL y
rf
ate of
I
reaction
\
\
\
.
\
. .
0 1
2
3
4
5
6
7 8
9 10
pH
Reaction
rate
a
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960- 8701, 968- 8427
Item 13 refers to the
graph
below showing
the effect of pH on the activity of enzymes.
Item 14 refers to the
diagram below
\ 1 i
shows the effect of increasing su
concentration on the rate of an e
catalysed reaction.
13.
Chymotrypsin is an enzyme
that
is found in
the human alimentary canal. It is active
over
a na.. TO Wrange of alkaline pH values. Which
of the activity curves represent the activity
of chymotrypsin?
I
I
I
~
Substrate concentration
(A)
(B)
(C)
(0)
I and II only
IandNonly
II and lITony
illandNonly
14.
Which of the labelled curves BES
represents the presence of a comp
inhibitor?
(A) I
(B) II
(C) III
(D) IV
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Item 15 refers to the diagram below which
shows the structure of a triglyceride.
17. What type of bOD~S are used to link
nucleotides
togetherto form
apolynucleotide?
X
ii
-c~
H
I
H.-CX
I
H-C- X
i
I
H- C- X
I
II
(A)
Peptide
(B)
G l t : O S . i d i c
(C) Hydrogen
(D) Phosphodiester
o
II
-c~
18.
Why
is the copied portion of the DNA longer
than
that of
the functional l1.RNA
molecule
produced from it?
.. . , .
A
l l
-C~
(A) The DNA portion contains many
genes.
(B) The DNA
portion contains a
Which
of the following
is
represented by the
label X? (C)
prom oter region
Only exon portions
are
included in
tbemRNA.
Only intron
portions are
included
in
the rnRNA.
(A)
Carbon
B
Nitrogen
(C) Oxygen
0
Sulphur
D
19.
Structures that may be observed in animal
cells during mitosis but are NOT seen during
ceil division in flowering
plants
are
tem lfi.refers to the diagram below showing
a segment of a strand ofI)i :A.
(A) centrioles,
(B) chromatids
(C)
centromeres
(D)
spindle
fibres
ze.
In a rat cell, there are 32 chromatids present
at the beginning of Prophase of mitosis.
bonds
How many chromatids would there be in the
cell at the beginning of meiosis?
16. The base Xis
16
23
32
64
(A)
(B)
(C)
0
(A)
cytosine
(B) guanine
(C) uracil
(D) adenine
5
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Item 21 refers to the information below.
Mendel crossed pure-breeding round and
yellow peas with pure-breeding wrinkled
and
gaocn peas. The F seeds were roundand
yenow. The F Iseeds were self-pollinated and
the seeds of the
F.
showed the following
characteristics: -
355 round and
yellow
123 wrinkled and
yellow
26 round and green
34 wrinkled and
green
25.
21.
A major conclusion
that
can
be
made
from
this data
is that the
(A) alleles for round
and
yellow peas arc
dominant
(B) alleles
for wrinkled and green
peas
are dominant
(C) genes
fur pea colour
and
shape are
epistatic
(0)
genes for pea
colour and
shape are
li I : l k O O .
22. 'The mRNA molecule transcribed from the
DNA does NOT contain
(A) adenine
(B) cytosine
C guanine
D
thymine
23.
Which of the following statements correctly
describes the difference between RNAand
DNA?
26.
(A)
(B)
(C)
0
RNA is double strand, while DNA is
single strand.
RNA
has
uracil
as
one of'its organic
bases, wbile DNA does not.
DNA
has
five different nitrogenous
bases, while RNA has four.
RNA is found only in the cytoplasm,
while DNA is found only in the
nucleus.
Two parents, both of blood group B, have a
son with blood group
O.
The probability
that their next child will have blood group B
is
(A) 0.25
(B) 0.375
(e) 0.50
(D) 0.75
Which of the follovving
Inay
be used as
methods of gene transfer?
1.
Vrr .lS
Plasmid
Electroporation
DNA gun
I I .
III.
rv,
(A)
(B)
(C)
(0)
I and II only
I. II and ill only
I. ITand IV oniy
I, II, III and IV
Item 26
refers to the diagram below which
illustrates
a
form
of
gene
mutation.
A B
C;
n
:E F
G
C
D
A
B
n
F
G
A
B
E
F G
e
e o
.
.
e o
Which form of gene mutation does the
diagram illustrate?
(A)
(B)
(C)
(D)
Deletion-
Inversion
Insertion
DupJication
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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27.
After which of the following forms of gene
mutation will
a
change
in
codons occur?
31
Which of the following provides nourish-
ment for the sperm-producing cells in the
testes?
1.
IT .
Ill.
N.
Substitution
(A)
(B)
(C)
(D)
Addition
Deletion
(A)
(B)
(C)
(D)
II and ITIonly
II and IV only
I, ITand ill only
I, III and IV only
32
Which of the following isNOT a part ofthe
anther?
Seminiferous tubule
S e r t o i i c e i l
Interst:.i tia1
ceil
Connective tissue
Inhibits the activity of the Leydig
cells
28.
(A) Pollengrain
(B) Stomium
(C)
Funicle
(D)
Tapetum
Giraffes are thought to have evolved long
necks due to a short supply ~f food ..
Selectionpressure favoured those with long
necks who were able to reach enough food
to survive. This type of selection is known
as
33.
What is the function of testosterone in
spermatogenesis?
(A)
(B)
(C)
{o>
,-,
stabilising .
disruptive
directional
artificial
(A)
29.
~4;.POSSIble benefit
of producing trar...genic
plantsis
(D)
(A) determination
of human genome
(C)
increased use of pesticides
(D) production ofelones
30. Which of the following plays the MOST
significant role in aUopatric speciation?
(A) Bebavioural isolation
(B) Temporalspeciation
(C) Ecological isolation
(D)
Geographical isolation
Inh ib its the
activity ofthe Sertoli
cells
Results
ill
the growth and
development of spermatogonia to
form
sperm
Results in the increased production
offollicle stimulating hormone
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
8/11
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8
Item 34 refers to the diagram below which shows the development of the embryo sac and female
gamete in a dicotyledenous plant.
e P r y n _
---- >>- ~ 1 degenerate
sac ~
J
mothereell
r >; ~
~ . : . J ----7 ~
embryo ,3
~ A
~s.e~
~~~-
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
9/11
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CAt...PE
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ltem37 refers to the diagram below which shows a longitudinal section of the ovule of a flower.
37.
The role of X is to
(A)
(B)
(C)
(D)
fuse with a male nucleus to form the embryo
fuse with
a
male nucleus to
form
the cotyledon
fuse with a male nucleus to fonn theendosperm
support
the
position of the ovum
and
disintegrate
after
fertilization
Item 38 refers to the diagram below which shows ovarian follicles in various stages of development.
38. Which option describes the correct order ofdeveIopment?
(A) I - II - ill - IV
(B) II - HI - I - IV
(C) ill - I - II - IV
(D) III - I - IV - II
9
I I
8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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8/10/2019 Cape Biology Unit 1 Mutiple Choice 2009
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~ refers to the simplified diagram below
of a recently implanted blastocyst in the
endometrium
of
the uterus.
Which.
of th e fo llow ing is th e
outermost
extra-
embryonic membrane and contributes to the
form ation of the placent a ?
45.
(A)
(B)
(C)
Dr
44. The structure labelled X is MOST likely tbe
(A) yolksac
(B)
trophoblas t
(C) blastocoel
(D) embryonic disc
Yolk sa c
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