1. Water lettuce is a floating plant found in ponds. Its buoyancy is assisted by water's high specific heat and latent heat of vaporization. 2. Sucrose is a disaccharide made of glucose and fructose that is efficiently transported in phloem tissue because it is very soluble and can move in high concentrations. 3. Fertilization in flowering plants occurs when a pollen nucleus fuses with the egg cell nucleus in the embryo sac of the ovule.

1. C4re 6PbOV o'u')
urtrr -/--2-
1' :Dj-t';;-;'-*;;.'a; {.;'aterletfuce) is arosette-likeplantfouqd floating inponds andnatr.galwaterways.
l1tjcL .-rj=e ibliening properties of water assists the plants to float?
(li ffiga cahesion
tB I ifr_=c ;pecific heat
(Ct Hi_eh iaiEf,t heat of fusion
(D) Hid laienr heat of vaporization
Item 2 ret'ers ro ihe following structures of rwo biological molecules.
Rr
lsCH-.,.*/-C/-'--C,,z
Hll I
Itr
Which of the tbllo*'ing combinations correctly describes the smrcture of molecules I and II?
Sucrose is a good transport molecule as seen in phloem tissue because sucrose is a
(A) disaccharide made up of two glucose molecules
(B) disaccharide made up of glucose and galactose
(C) very reactive molecule chemically and therefore combines easily with water
(D) very soluble molecule and can therefore be moved efficiently irrhigh concentrations
,'
GO :O- N TO,,T,]IE NEXT PAGE
oR3
ltlccHN/ C_--
Hll
o "b^"u3""R:
)
3.
2 amino acids joined by a peptide bond 2 4-glucose residuesjoined by a 1,4 glycosidic
bond
2 amino acids joined by a glycosidic bond 2 p-glucose residues joined by a I,4 peptide
bond
3 amino acids joined by 2 peptide bonds 2 B-glucose residuesjoined by a I ,4 glycosidic
bond
3 amino acids joined by 2 glycosidic bonds 2 *glucose residuesjoined by apeptide bond
t2t07}tDtcAPE 2015

2. -3-
Item 4 refers to the following stnrctures of some biological molecules.
cE,oH
....o-9H
OH
o
tl
H,C- O-C-R-l o
Hc-o-8-*'
lo
E c- o-8-*"
IU
il
H,C-969*-t
I
EC-COO%
lott
E2C-O-P-O
ll
o
3.
which ofthe biological molecules forms the IvIAIN component of the cell membrane in animals?
(A) I
(B) rr
(c) m
(D) rv
which of the following biological molecules has both hydrogen and disulphide bonds?
(A) ATP
(B) DNA
(C) Insulin
(D) Triglyceride
CH.OH 9n oII
,H
02r070t0/cAPE 2015
.GO.ON TO THE NEXT PAGE
NH
ArtA,-z
E
o
I
rv

3. -4-
Item 6 refers to the following information.
Students conduct the Benedicfs test on four different clear solutions containing varying amounts
of a reducing sugar. The results, indicating the degree of colour change, are shown below.
I_J L] L] L-]
I Jctear | +orange I Jnea | +Yellow
t_J
liil'""'
u
precipitate
t_J
precipitate
u
precipitate
Solution 1
6.
Solution 2 Solution 3 Solution 4
Which of the following combinations shows the correct sequence of the solutions, in ascending
order, from the LEAST amount of reducing sugar to the MOST?
Solutions
(A) I 2 3 4
CB) I 4 2
a
J
(c) 2 4 1
a
J
(D) J 2 4 I
8.7. Which ofthe following isNOTlikelyto be
seen in an electron micrograph of a plant
cell?
A student's plan drawing of the TS of a
dicotyledonous stem seen under low power
is shown below.
50 mm
The acaral diameter of the stem is 10 mm.
What is the magnification of the drawing?
: :'
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(A)
(B)
(c)
(D)
Tonoplast
Ribosome
Centiole
Golgi apparatus
(A) 5
(B) 10
(c) 100
(D) soo
'60 J
Io
0210701,0/CAPE 2015

4. -5-
9. Which ofthe following combinations corectly identifies structures typical of a eukaryotic cell?
Endoplasmic
Reticulum
Mitochondria Nuclear Membrane 70 S Ribosome
(A) X
I
1 { X
(B)
I
I 'v { x
(c) x x x
I
1
(D) { { x ^/
Key {: present
x = absent
12.10. Bobby is given atropical freshwaterfish for
his birthday. Experimenting with the fish,
he places it in seawater and it dies. Which
of the following statements MOST likely
explains the reason for its death?
(A) Water diffirses into the fish.
(B) Water diff:ses out of the fish.
(C) Ions diffi:se from the fish to the
seawater.
CD) Less oxygen is in seawater than
freshwater.
Which ofthe following correctly describes
the importance of cholesterol in a cell
membrane?
A plant cell is placed in Solution A, which
has a lower water potential than the cell
contents.
Which ofthe following combinations shows
the MOST likely change in the cell and the
cause ofthe change?
Item 13 refers to the following diagram.
11.
(A)
(B)
(c)
(D)
It interacts with fatty acid tails to
exclude water.
It forms channels in the membrane
facilitating entry and exit ofpolar
molecules.
It has branching carbohydrate
chains which act as identity
markers.
It enhances the flexibility and
mechanical stability of the 13.
membrane.
Change Cause
(A) Becomes turgid. Solution A moves into the
cell.
(B) Becomes turgid. Water diffi.rses into cell.
(c) Becomes flaccid. Water difrrses out of the
cell.
(D) Becomes flaccid. Solution A does not move
into the cell.
Outside 611
"F{nnnfl;f
nnnn@nn
qq'HHUU/ UUUUUUUUU
Which of the stnrctures, A, B, C or D, is
important for cell to cell recoqrition?
02r070r0/cAPE 2015
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5. ilr rv
14.
-6-
Item L4 refers to the following graph which shows the effect of pH on the activity of enzymes.
Rate of
reaction
012 3 4 S 6 7 8 910
Pepsin is an enzyme found in the human alimentary system. Which of the above activity curves
represents the action ofpepsin?
(A) I
(B) rr
(c) m
(D) IV
According to the endosymbiotic theory, organelles such as chloroplasts and mitochondria may
have evolved from prokaryotic organisms. Which of the following is NOT a line of evidence in
support of this theory?
(A) Many bacteria are similar in structure to eukaryotic nuclei.
(B) Chloroplasts and mitochondria both contain DNA-
(C) The average diameter of a chloroplast or mitochondrion is similar to that of a bacterium.
(D) Photosynthetic bacteria have their pigmenG located in membranes similar to chloroplasts.
Which of the following is found in both DNA and transfer RNA?
(A) Uracil
(B) Ribose
(C) Sugar-phosphatebackbone
(D) Double helix structure
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15.
16.
021Q70r0/cAPE 201s

6. -7 -
17. In proiein synthesis, which two of the
molecules illustrated below are involved
in the process of transcription?
item 18 refers to the following table which
shorvs the codes and the matching amino
acids.
18. Which of the follorving amino acid
sequences would be produced from
information coded onthe DNAstrand shown
below?
ATGGCCAATGGCGAT
I
!llr
ffitr
19.
(A)
(B)
(c)
(D)
leu-pro-tyr-gly-ary
tyr-arg-leu-pro-leu
pro-gly-leu-thr-arg
tyr-arg-gly-pro-leu
Which of the following is NOT a feature
of the genetic code?
(A) Similar amino acids may have
similar codons.
(B) A triplet of bases codes for one
amino acid in a polypeptide
chain.
(C) One amino acid may be coded for
by more than one codon.
(D) Each species has its own set of
unique triplet codes.
The followingdiagram shows the structure
ofa tRNA molecule. Which letter, A, B, C
orD, indicates theposition on the molecule
where the amino acid would be attached?
m
20.
F
ccac/
(A)
CB)
(c)
(D)
TV
I and II
I and fV
II and III
fII and IV
ACC-tbr UUA-leu CUA-leu CCG-pro
CGG-arg CCA-pro UAC-Wr GGC-gIy
o2107010/CAPE 201.5
GO iON TO TI{E NEXT PAGE

7. -8-
21. Which two of the following features are
evi dent durin-s mitosis?
I. Trvo daughter nuclei containing
identical sets of chromosomes.
I Homologous chromosomes come
to-sether and crossing over
occurs.
III. Four daughter nuclei containing
half the number of chromo-
somes.
fV. Homologouschromosomesdonot
associate.
(A) I and II
(B) I and [V
(C) II and trI
(D) III and IV
Which ofthe following is NOT tnre ofmost
homologous chromosomes?
(A) They are the same lengh.
(B) They contain the same alleles.
(C) They contain the same number of
genes.
(D) Euchromatinandheterochromatin
bands are the same.
Item 23 refers to the following diagram
which shows a pair of homologous
chromosomes, heterozygous for two gene
loci, Aa and Bb.
Centromeres
23. If crossing over takes place in Region 1,
which ofthe following alleles will segregate
at Meiosis I?
(A) A from a
(B) a from a
(C) b from b
(D) A fromA
o2t07010/cAPE 2015
Items 24-25 refer to the following
information.
Fur colour in mice is controlled by a pair
of genes occupying different loci- 'r)V'r
represents the presence of colour, "w"
represents albino. The allele for brown fur
is "A" and for black fur is "a".
The genotype wwAa is
(A) brown
(B) black
(C) albino
(D) sev
What is the phenotypic ratio ofthe F, from
a cross between two F, with the genotype
WwAa?
(A)
(B)
(c)
(D)
3 brown
3 brown
9 brown
9 brown
4 black
9 black
3 black
4 black
9 albino
4 albino
4 albino
3 albino
A possible benefit of producing transgenic
plants is
24.
22.
26.
(A)
(B)
(c)
(D)
determination of human genome
improved human nutrition
increased use of pesticides
production of clones
27. In the production of recombinant DNA,
restriction enzymes are used to cut
double standed DNA molecules to form
fragments. Which bonds are cut by these
en4;mes?
(A) Peptide
(B) Hydrogen
(C) Phosphate
(D) Nitogen
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8. -9
31.28.
32.
Which of the following is NOT one of
Dantin's observations about natural
selection?
(A) Thereisvariationamongindividuals
of a given species.
(B) Organismsproducemoreoffspring
than are needed to replace
parents.
(C) Natural populations tend to remain
stable in size over long periods.
(D) Populations consist of those
individuals best adapted to
existing environmental
conditions.
Mutations can have varying effects on an
organism depending on when it occurs.
The occurrence of a mutation has the
GREATEST effect during
(A) translation
(B) RNAslmthesis
(C) DNAreplication
(D) somatic cell formation
Which type of isolation plays the MOST
significant role in allopatric speciation?
(A) Behavioural
(B) Temporal
(C) Ecological
(D) Geographical
A horticulturalist has bred a Hibiscus
variety which bears violet flowers. Which
method of propagation would be MOST
appropriate for rapid production of a large
number of clonal plants?
(A) Seed
(B) Cutting
(C) Fragmentation
(D) Tissue culture
hich of the following occur in asexual
reproduction ONLY?
(A) Offspring are genetically the same
and gametes are almost never
involved.
(B) Offspring are genetically the same
and there is fusion of gametes.
(C) Gametes are never involved
and offspring are genetically
different.
(D) Gametes are never involved and
there is fusion ofhaploid nuclei.
Which ofthe followingterms is the MOST
appropriate to describe a plant in which
the anthers of the flower mature before the
stigma?
(A) Protandry
(B) Protogyny
(C) Monoecious
(D) Hermaphrodite
29.
33.
30.
34. Which ofthe following methods of asexual reproduction is INCORRECT, either by its definition
or its examples?
Tlpe of Reproduction Definition Examples
(A) Binary fission Splitting into two daughter cells of
similar size
Amoeba
Bacteria
(B) Fragmentation Splitting into several pieces, each of which
regrows
Flatworms
Spirogtra
(c) Budding Producing an outgrowth from the par€nt,
which breaks offand becomes a separate
individual
Hydra
Yeast fungus
(D) Spore formation Producing small, lightweight spores;,to, assist
airdispersal ':' -
Hibiscus
Flamboyant
GO'ON TO THE NEXT PAGE
02r070t0/cAPE 2015

9. 'tl'l
.. r:. -.1
,. ln- l'' -
. i.
'I
Ien lstufurs'to ths followlng dlagrom rhowlng 4 mohrro pollon grein,
35.. Which iif tire labelled stnrctures will give riseto two male gametes?
the following table St o*, the correct chromosome number for the structures
I
'.: I
(A) I
(B) II
(c) m
(D) IV
36, Which:row in
indicatsd?
ChromocomE Number
n 2n 3n
(A) Pollen tube nucleus Cotyledon Endosperm
(B) Pollen tube nucleus Endospe.rm CoWledon
(c) CoWledon Pollen tube nucleus Endosperm
(D) Cotyledon Endosperm .t Pollen tube nucleus
Item 3Tirefers to the diagram below *hict,
shows a longitudinal section through the
ovule of an angiospenn.
37. The role of Y is to
.j. j
,(A) fuse with a male nucleus to form
' the endosperm d':"
(B) fuse with a male nucleus to form
'". the coryledon
|;
(C) ,fuse with a male nucleus to form
, the embryo i
: and disintegrate after fertilization
Item 38 refers to the following diagram
showing a transversq section through the
middle piece of a sperm.
The structure labelled H is
(A) a nucleus
(B) an acrosome
(C), a microtubule
(D) a mitochondrion
.l
38.
n?rn?nln/(-aPF ?nl{
ffi
GO ON Tb TUP NEXT PAGE
IV
ru
:

10. i,l,
'j'
Itbm 39 iifels to the following diagram bf
the human female reprductive system.
During spermatogenesis in a human,
first cells to divide meioticallv are
(A) spermatids
(B) spermatogonia
(C) primary spermatocytes
(D) secondary spermatdcytes
the
ll'
40.
.t
39. . At whichiof the'regions
and IV does fertilization
(A) I,
(B) Il
(c) ur
(D) rv-
labelled I, II, III
take place?
i
Item 41 rOfers to'a
hormones W and
the following graph which shows the relative concentrations of the pituitary
X, aqd the ovarian hormones Y and Z during the menstrual cycle.
41. The hormpnes W, X,Y andZ are
.;.
.::1
I OICAPF. 2nl s
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421070
w X. Y z
(A) .pro$esterone oestrogehl ADH FSH
(B) .FSH. LH oestrogen progesterone
(c)" ;oestrogen LH adrenaline progesterone
(D) LH oestoge4 FSH progesterone

11. t2 -,,
42. A samplq of a woman's urine is te,{jbd
" dt a iaboratory and human choriohic
gpnadotrpphln ia dptooted, ThlE indlontpa
that jr
(A) oyulation has occwred : '
(B) menstruation has begun
(C) obstrogen levels have dscrease4
(D) irhplantatipn of.an embryo has
The horinone which stimulates the
developriient of the endometrium (lirling
of the uterus) is
(A), o=estrogen t .
(B) .Fiogsqteronc r'{'
(C) hi-tofnizlng hormono
(D) follicle-stimulating hormone
Item-44 refers to the following events seen
in the development of and impla;rtation of
s hurnflt smbryP'
I. inner cell mass fo@s.
il. Theallantois fuseswith the chorion'
ru. Chorionic villi grow.
IV. Maternal'blood spaces form'
The correct $equence ofevents iS
(A) I, U, ilI,IV
(B) I, ilI,IY II .
(c) uI,I, II,IV'
(D) III, II, I,IV
During the dovelppment qf g fpetus In tlts
womb, the uterus wall consists ofthe muscle
of the utenrs wall and the
(A) endomekium
(B) chorionic villi
(C) placenta
(D) chorio4
.OCCUrred
EID OF TEST
' .1
IFYOU FTNTSH BEFORE TrME rS CALLED, CHpCK YOUR WORK ON THIS TEST.
44.
43.
45,
i':
r ::
', .. i :i
, 0210701O/CAPE,2015