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FORM TP2007166,
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TEST CODE 022070 10
MAY/JUNE 2007
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CARIBBEAN\ EXAMINATIONS COUNCIL
{\DVANCED,PROFICIENCYEXAMINATION\BIOLOGY.,. UNIT 2
""Paper 01
\.90 minutes
I(11 JUN'E 2007 (P.m.»)
READ THE FOLLOWING DIRECTIONS CAREFULLY.
1. In addition to this test booklet, you should have an answer sheet.
I2.
3.
Each item in this test has four suggested answers lettered (A), (B), (C); (D). Read each item you are
about to answer and decide which choice is best.
On your answer sheet, fmd the number which corresponds to your item and shade the space having
the same letter as the answer you have chosen. Look at the sample item below.
The best answer to this item is "ATP" , so answer space (A) has been blackened.
Sample Item
Which of the following is NOT a form of
energy storage?
(A) ATP
(B) Lipid
(C) Aloohol
(D) Lactic acid
Sample Answer
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4: If you want to change your answer, be sure to erase your old answer completely and fill in your new
choice.
S. When you are told to begin, turn the page an~ work as quickly and as carefully as you can. If you cannotanswer an item, omit it and go on to the next one. You can come back to the harder item later. Your
score will be the total number of correct answers.
6. You may do any rough work in this booklet.
7. Figures are not necessarily drawn to scale.
8. The use of non-programmable calculators is allowed.
9. This test consists of 45 items. You will have 90 minutes to answer them.
10. Do not be concerned that the answer she~t provides spaces for more answers than there are items in
this test.
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
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~ ,f ~ ., 6. If oxygen is not available during the process
of aerobic respiration, the net number of
ATP molecules produced from a molecule
of glucose is
Item 9 refers to the following apparatus set
up to determine the rate of respiration of
germinating seeds.
In the diagram of the mitochondrion below,
enzymes which catalyse oxidative
phosphorylation are located at site
7.
(A)
(B)
(C)(D)
2
4
3438
Metal
gauze
Soda
lime
Glass tubing of
2 mm internal diameter
Germinating seeds
Shallow
tray
of water
Water in
tube
Position of
meniscus
8.
I
II
III
IV
(A) I
(B) II
(C) III
(D) IV
Which of the following pairs of options is
correct for both the Krebs cycle and the
electron transport chain?
9.
The results of the experiment are presented
in the table below.
Time Volume of Oxygen
(mins) Absorbed (cm3)
(based on distance
moved by meniscus)
5 1.6
10 2.1
15 3.4
20 4.2
Which of the following quantities represents
the average rate of oxygen uptake by the
seeds during the time course of t he
experiment?
In muscle tissue undergoing strenuous
contractions, the formation oflactate is due
to the
(A)
(B)
(C)
(D)
Krebs Cycle Electron
Transport Chain
O2 is not consumed O2 is consumed
CO2 not produced CO2 produced
Site of action is the Site of action is the
inner membrane of inner layer of the
the mitochondrion grana NAD+ is reduced to NAD+ is reduced to
NADH+H+ NADH+W
10.
(A)
(B)
(C)
(D)
(A)
(B)
(C)
(D)
4.2 cm3 min"0.21 cm3 min-I
1.26 cm3 min-.
6.7 cm3, hr-I
high concentration of carbon dioxide
high concentration of glycogen
low concentration of glucose
low concentration of oxygen
\
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Net primary production (NPP) is
The figure below represents an ecological
pyramid of numbers. The species of organisms in the pyramid arc blackbirds,
aphids, lice and cherry trees.
Item 14 refers to the terrarium below, an
example of a self-sustaining unit.
Which of the following reasons explains why
the plants in the jar continue t9 thrive for
several months after the jar is sealed, even
though no additional materials are used?
(A) The plants contain stored
carbohydrates that are utilized.
(B) Microorganisms in the soil
decompose the organic wastes to
facilitate recycling.
(C) There are no herbivores in the jar to
eat the plants and thus limit
photosynthesis.(D) The glass jar exposes the plants to
adequate light for photosynthesis.
14.
-4-
the transf~r of energy through an
ecosystem
the amo~nt of organic material
availabl~ to lierbivo'res '<,
the amo~t of organic material made'
in photosYnthesis
the amouilt of energy reaching the!
earth's surface
I
I
Which of the follo&ing is a correct defInition
of the term 'habidt'?'" . I'
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The relationship: between an
organisrri and other speciesI
The interacting community of
organisnis and the environment
The way ~nwhich the enviromnent
is exploited by the organism
A location within a biome where an
organism dwells
(A)
(B)
(C)
(D)
(A)
(B)
(D)
(C)
11.
13.
...12.
15. In the nitrogen cycle, denitrifying bacteria
convert
Match EACH of the species below with
the options above.,
(A)
(B)
(C)(D)
atmospheric nitrogen to nitrates
nitrates to atmospheric nitrogen
ammonium compounds to nitrates
atmospheric nitrogen to ammonium
compounds
w X y. Z
(A) lice aphids blackbirds cherry"trees
(B) blackbirds lice ! aphids cherry, trees
(C) aphids cherry i lice blackbirds
trees
(D) lice blackbirds aph~ds v cherry'i
trees
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\ -\- •. 16. Which of the following describes the function
of the endodennis?
18. The function oJ the companion cell in
mature phloem tissue is that it
(A)
(8)
(C)
(D)
I.t controls the movement of water
and ions to the xylem using a
Casparian strip.
It releases root pressure as water moves into the xylem by osmosis.
It allows water molecules to cling to
the surface by cohesion so that a
continuous column is created.
It fOnTIS a system ofinte~-connected
plasmadesmata through which
water and ions can move.
(A)
(B)
(C)
, (D)
provides structural support for the. sieve tubes
I actively moves sucrose out of
neighbouring photosynthesizingcells to!the sieve tubes
I
moves I sucrose against a
concentration gradient into the
xylem .~
contain~ a nucleus needed for cell
division of the sieve tube elements
Itern 17 refers to the diagram below which
shows some ofthe cells involved in loss of
water from part of a p l~nt.
19. r
Which of the following statements presents
the BEST eviden'ce to support the mass flow
theory ofp~loerri transport?
(A)
(B)
(C)
Phloem tissue carries manufactured
food to destinations
simultaneously, rather than to the
greatest 'sink'.I •
Sieve plates are a barrier and have
been rbduced in the course of
evolution.
Contents of sieve tubes are under
: pressu~e, and sugar solution
"", 'exudes!ofphloem are cue I
(D) Approp~iate gradients between
'source', and 'sink' tissues do not
exist.
Qp
17. Which ofthe following correctly identifies theregions labelled P and Q?
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Items 21 - 22 refer to the diagram below
which shows the pressure in the left side of :the heart,
21. The semi-lunar valves close at
I
I
I
I
I
II"
J,WUI ;
I
I
I
Abrta I I
1(,'1
Left
ventricle~~III
I
II
III
IV
(A)
(B)
(C)
(D)
x
-3"
.3Left side
of heart 16
13
Pressure/ 11kPa
5
II
III
IV
I - 6-
Item 20 shows a/diagram ofa longitudinal
section of the heart.,
20,., The position ofilie sino-atrial node is indicated
by :
(A)
(B)
(C)
(D)
I
II
III
IV
22. The small surge in pressure in region X is
caused by
23. , What is the approximate magnification of
this photograph?
(A) atrial diastole
(B) atrial systole
(C) ventricular diastole
(D) ventricular systole
Item 23 refers to the photograph below which
shows a human blood smear,
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(A) x7008 x 110
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Which of the following combinations of
processes numbered I to IV, relates to the
liver?
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Microvilli
Mitochondria
Nucleus
} Blood capillary
. Bowrnan>s capsulei collecting duct
I
glomerulus
proximal tubule
The region of the nephron shown is the
Item 26 refers to the diagram below which
shows the ultrastructure of two cells from
the ki~ney with part of an adjacent capillary .
(A)(B)
(C)
(D)
Glomerular filtrate contains substances with
a relative molecular mass less than 68,000.
Larger molecules' such as red blood cells and
proteins are prevented from passing into the
nephron because of the
.'
26.
27.
pH 7.5 pH 6.8
o
100
Item 24 refers to the graph below which
shows the oxygen dissociation curve for
haemoglobin at pH 6.8 and 7.5.
AII
Partial pressure of oxygen
The percentage saturation of haemoglobin in
the blood leaving an active muscle is shown
at
(A) A
(B) B
(C) C
(D) 0
% solution
ofhaemoglobin
50
24.
25.
, . ~~:..,•
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.
."...
1.II.
III.
IV.
Glucose regulationTransamination
Storage of Vitamins A, Band D
Manufacture of digestive enzymes
(A)(B)
(C)
(0)
basement membranecapillaI)' endothellium
podocytes
glomerular pressure
(A) I, II and III
(B) I, II and IV
(C) I, III and IV
(D) II, III and IV
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28.
iI
Which of the follpwing pairs of cells and structures possess myelin sheaths?
(A)
(B)
(C)(D)
iI and II 0ply
II and IIII0nly
III and IV' onlyIIV and I rnly
I
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A delay of 0.5 rP.soccursin transmissionI
across a synapse: becauseGlucagon is a hormone secreted by cells in
the pancreas. Which TWO of the following
changes are brought about by glucagon?
29.
(A)
(B)
(C)
(D)
calcium ions diffuse into the synaptic
knob
ion channels in the postsynaptic
membr~ne respond slowly to the presencF of acetylcholine: which
diffuses across the cleft
the sY~Hlptic knob releases
acetylcholine which diffuses across
the cleft
the presYnaptic membrane is in a
refractory period!
30.
1.
II.
III.
IV.
(A)
(B)
(C)
(D)
It decreases the blood gucose level.
It increases the blood glucose level.
It stimulates the breakdown of glycogen.
It stimulates the formation of
glycogen.
I and III
I and IV
II and III
II and IV
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31.
32.
Which ofthe following cOITectly identifies
three groups of nutrients that provide energy
in the diet?
(A) Protein, minerals, fibre
(B) Lipids, carbohydrates, fibre
(C) Lipids, carbohydrates, protein
(D) Minerals, water, fibre
Which of the following conditions is NOT
caused by malnutrition?
(A) Obesity
(B) Marasmas
(C) Kwashiorkor
(D) Emphysema
35. : Which ofthe following combinations correctly
describe the pathogens responsible for
malaria, dengue fever and AIDS?
Malaria Dengue I AIDS'Fever
(A) Eukaryotic Virus I Virus parasite-
(B) I Bacterium I Eukaryotic I Virus
parasite
(C)I Virus I B~cterium I Eukaryotic parasite
(D) :I Eukaryotic I B~cterium I Bacterium
arasite ,
34. Which of the following factors is
responsible for the increase in heart rateduring exercise?
Fatty deposits in arteries can contribute to
strokes and heart disease. This condition is,called
(A) arteriosclerosis .=""-,,,Jenloj J!ot.J.r,e~
(B) arthritis .
(C) throl1)bosis - ~Io+
(D) atherosclerosis = .('G-.-I\~ ()...•..f O'J6
Which of the following diseases is treated
with drugs that have a similar structure to theDNA molecule? :
(A) AIDS
(B) Malaria'
(C) Dengue fever
(D) Sickle cell anaemia
36.
Accumulation oflacticac'id in the
muscles.
Decreased oxygen concentration in
the blood stream ;..
Increased adrenaline in the blood
stream
Increased glucose concentration in
the blood stream
(A)
(B)
(D)
(C)
33.
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022070 I0/CAPE2007
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Two characteristics of T lymphocytes are
antigens
antibodies
phagocytes
haemoglobin
Pregnancy testing
Diagnosis of diseases
Prevention of transplanted organ
rejection
Gene therapy
(A.)
(B)
(C)
(D)
A newborn baby is protected from diseases
by antibodies. acquired from the maternal
circulation. This is an example of
1. Globular glycoproteinU. Four polypeptide chains
III: Two identical binding sites
IV. A hinge region
Which of the following is NOT an example
of an application for monoclonal antibodies?
Item 39 refers to the options below.
(A) artificial active immunity
(B) artificial passive immunity
(C) natural active immunity
(D) natural passive immunity
(A)
(13)
(C)
(D)
Fat accumulates in thc liver when alcohol is
cqnsumed regularly because
39. The above features are characteristic of
40.
41.
42.
4
'2
1
4
3
4
3
3
I
2
1
3
4
2
4
I
Which of the following shows the correctI ,
sequence of the p~agocytic process?;,
21!
I !I
2!3
(A)
(B)
(C)
(D)
i - 10-Ii ,
Item 37 refers to the diagrams below which.
shows the stag+of phagocytism of a
bacterium by a nelftrophil. i
The following 'are characteristics of
lymphocytes.
1. Attack :cells" i nfected with
microorg~sms
II. Produce antibodies
III. Produce ~emory cells
IV. Mature in the thymus gland
38.
37.
.
(A)
(B)
(C)
(D)
Iand IIonlyI
I and'III oflly
I and IV only
III and IV:only
i
(A)
(B)
(C)
(D)
liver cells use alcohol as an energy
source instead offat
fat absorbs alcohol and helps to
detoxify it
alcohol is used to synthesise fat
molecules in the liver
alcohol prevents the liver cells from
secreting fat molecules
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43.
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Hem 43 refers to the diagram below which
shows the manufacture of recombinant
human insulin.
o~@1--4 •..• _mRNA
~ JCDNA
II .~ l
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~
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At which point of the stages, labelled I, II, III
and IV, does the replication of donor genes
occur?
(A) I
(B) II(C) III
(D) IV
44.
45.
Which pair of effects, labelled I to 1Y, is a
direct result of nicotine in tobacco smoke?
\ C . .1 f . ld''t. ,onstnctl~n 0 artena lameter
II. 'Increased mucus production in the
alveoli I
III. Paralysis bfcilia in the bronchiIV. Increased stickiness of blood
I
plateletsI
I
(A) . I and II
(B) I and IV
(C) II and III
(D) III and I\{
Which of the following explains the use of
restriction enzymes in gene technology?
(A) Breakingidown bacterial cell walls
to releas~ plasm ids
(B) Forming DNA from RNA(C) . ,Cutting 'open circular DNA of
plasmids:
(0) :Joining d:ifferent pieces of DNA to
, form recbmbinant plasm ids
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IF YOU FINISH BEFORE TIME IS CALLED, CHECKY0,tJR WOj ONTIDS TEST.
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02207010/CAPE2007
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