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964/1
BiologyPaper 1September
20122 %hours
MAJLIS PENGETUA SEKOLAH MALAYSIA
CAWANGAN MELAKA
PEPERIKSAAN PERCUBAAN TINGKATAN ENAM
TAHUN2012
BIOLOGY
Paper 1
One hour and forty-five minutes
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2
1 The diagram below shows the structure of a biological molecule. P represents a
phosphate group. What is the name of this molecule?
CH2COOC11H3s
ICHCOOC1sHJI
ICH20- (;)
......__.....
A phospholipid
B glycerate 3-phosphate
C NADP
D Triose phosphate
2 Which of the following properties of water are essential for the functions of blood
plasma?
I universal solvent
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3
3 The diagram below shows the movement of hree substances P,Qand R into a cell
through the cell surface membrane.
What are P, Q and R?
A
B
c
D
p
ethanol
Carbon dioxide
acetone
HC03.
p Q R
Q R
oxygen Amino acid
acetone Amino acid
glucose Oxygen .
oxygen glucose
4 Which of the following are not correctly matched?
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4
5 Which of he following are the special features of the scanning microscope but not of he
transmission electron microscope?
I. An electron beam is used.
II. A two-dimensional view image is produced.
III. The specimen is coated with'a thin layer ofmetal.
IV. A narrow electron beam is used to illuniinate the surface of the specimen.
A. II only B. III only C. III and IV D. I, III and IV
6 The graph below is a plot of 1._ against 1._ for
V [S]
(i) hydrolysis ofpenicillin by the enzyme periicillinase
(ii) with an inhibitor
. .. ~
ii) Reaction with inhibitor X
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5
I ·I J l I ..1 .c G A A G c
7 The diagram above shows part ofone DNA strand. Which of the folloWing would be
produced by this strand and its complementary, strand after semi-conservative replication?
A I I ·1 · l l I .B I . I : l .+ · I .C G A A G C C G A A C
G cu·u ·c G G CT ·t c · GI I I I I I I I l !. · . I
C I l I I IG G A ~ G C
G C T T C GI 1· J I · I I.
I 't · I I I lCGAAG< ;
GCTTCG
I. r .f. I . I I .
G G T<1' td! G·
·.1 I 1 ' j .J I
Dl 1·1 I I I
C G A A G C
G C U U C. G
I I. I I . 1 I
r 1 . l· r r 'c: G A .A <;1· cGCU UC .GI I ( I I
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6
9 The graph below shows the absorption spectra for different photosynthetic pigments.
The X-axis shows the wavelength of light and theY-axis shows the percentage of
light absorption.
, ' ' . ... . . Graph 1
. ,_ .,_ , ' ......_ .··Graph 2. · f \ ~ " :' , - .,... - Graph 3~ a .... i ,Y, v / .. .
, ! ! _··= I J I ~ ' \\ : ..
&! "Ci ,· .).J" • I • '~ · ·_J '\ \ \ ./X \j; .. .\. - •• .. . . . ,. ,. : •• ., . •~ : . . . , ~ > ~ - ~ ~ ..... · • ••• · ;, .• '•
400 500 6"00 700
W ' - v e l ~ n g t h cfliglit (nm)
Which of he following combination is correct?
Chlorophyll a
Absorption spectra
Chlorophyll b Carotenoids
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7
11 The diagram below shows the Krebs cycle
Pyruvate ' .!IAcetyl coen;yme A .
. . ~ ~ z y m e Ao x a t o a c e t a t ~ " · ·
Citrate ·v( . \
Malate l$ocltrate
\ 1nFumarate a·Ketogfutarate~ s ... /Inuc,..nate
What are the stages at which transfer ofelectrons toNAD+ occur?
A. I, II, IV and V B. I, II, III and V
C. I, II III, IV and V D. II and III
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8
13 The graph below shows the oxygen dissociation curve for haemoglobin.
2 4 6 8 10 . 12
·Partial pressure :of02/kPa
In which part of he mammalian body will haemoglobin experience the. .
pereentage ofoxygen saturation as at the points I, II and III?
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9
14 The scheme e l o w illustrates the biochemical reactions for the transport ofoxygen and
the release of carbon dioxide in lungs. What are the substances represented by P, Q, R, S, T and
U.?
A
B
c
p
Hb
HHb
HHb
Q R
HHb Hb02
Hb Hb02
Hb Hb02
s T u
C02 H2C03 HC03.
C02 H2C03 HC03.
HC03. H2C03 cr
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10
·16 A c c o ~ d i n g to the cohesion-tension theory by which water moves up the xylem, cohesion-
and tension exist d:ue to
A
B
c
D
Cohesion
Hydrogen bonding between a t ~ r molecules
Turgor press'!ll'e.
Forces of attraction between water molecUles and xylem
walls
Van der waals force ofattraction between water
molecules
Tension
transpiration
Root pressure
capillary
guttation
17 Study the diagram below. What causes the water potential higher in the two arms of he
loop ofHenle?
-300 -100
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11
18 . Halophytes are plants that survivein
salt marshes and estuarine mud. What are thefeatures that help these plants to conserve water?
A A large number of stomata
B Leaves have thick epidermis and ca.vered with fine hairs
C Root cells are able to absorb salt actively in order to lower the water potential
than surrounding water
D Variable leafshapes to reduce surface area exposed for evaporation
19 The receptor sites for neurotransmitters are situated on the
A nodes ofRanvier
B presynaptic membrane
C postsynaptic membrane
D membrane of he synaptic vesicles
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12
I
22 The flowering hormone that is produced during photoperiodic stimulation is translocated
thioughotit the plant through the
A xylem
B cambium
C xylem and phloem
D phloem
.23
·.Among.theJollowing types of cells, which causes rejection of issues or organs. ·.transplanted from donors to recipients?
...
A Phagocytes
B ;B lyinpbocytes "
c .Erythrocytes
D T lymphocytes
24 Which of he following are the steps in the reproductive cycle oflllV?
I The formation of a provirus
II The transcription ofviral DNA
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l
26
13
Diagram below shows the life cycle ofDryopteris .
• . ,-r.:._;;__::-_ · . ·-'::·. · .' { ~ ] . ............ .. .. ---..... ~ ..··: ···::: ~
... . .. . ·:.
: ;
·: .: . ..:.
' ' ,• ·:
.. :
. .
. . -Sems .
..... l: · · · . ~ o m.. l. .
. . ....
.· · [ ~ }·T ··. ···:_··
.. :,:
:::·:... .. s .
' ' ' H ' H 'Jz ~ ,, ,. H' .;
What do X, Y and Z represents?
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14
28 Table shows three types ofgerm layers and the tissues, organs, or systems which are
f o r m ~ from it. Which of he combmations are correct?
Layers Organs or systems
(a) Endoderm. . ,.
(I) Connective tis,sues, e p r o ~ u c t i v e and endocrine systems
( b ) M e s ~ e i m (II) Epid.ennal .and skin, nervoussystem. . ' '
(c) Ectoderm (III) Liverand pancreas, ep1thelium·of alimentary canal..
A (aXIl), (b)(l), (c)(III)
B (a){III), (b)(l), (c)(II). '.
C (a (III), (b (II), (c (I)
D (a)(l), (b)(ll), (c)(III)
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15
30 Diagram below shows the scheme of hormonal control in insects.
External stimulation
! .Nenrositoty """' ioblain
N e t t r o s e c r e t o r y h o n n o n e ~ - . . . . . . . . _ .~ ~ ~u ~ . , 0 ~
larva Pupa Adult
Different hormone
Which of the following identifies I, II, III and IV?
I II III IV
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16
32 Drosophila flies with grey body and long wings_were crossed with black body and
vestigial wings. The FI offspring obtained were as follows:
• Grey body, long wings : 522
• Grey body, vestigial wings; 98
• Black body, vestigial wings : 496
• Black body, long wings :104
W4at is the crossover value?
A 8% B 9%
c 17% D 20%
33 During fertilization ofan ovum, non-disjunction of sex chromosome occurs. The ovum
was then fertilized by a sperm cell with normal Y. which one of he following shows the
sex chromosome complementof the resulting zygote?
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17
35 Which f t h e following conditions must be met for a population to be in Hardy-Weinberg
equilibrium?
I L_rge population size
IJ. W ~ o n only at the beginning ofbreeding season
III No ovedapping ofgenerations
IV MUtations occur at constant rates
A .. IIart4IV
B I and il l
C I arid II
D II, i l l and IV
· 36 In a popuhttion which is in Hardy-Weinberg equilibrium, 16% of the individuals show
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rs
38 Diagram below represents a part ofDNA which controls the synthesis ofBeta
galactosidase
The table below shows the parts ofDNA and their functions.
Part Function ..
R (a) Binding site for repressor protein
p (b) Genetic information for synthesis of repressor protem
Q (c) Binding site for RNA polymerase
Which of he following combinations is correct?
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19
39 Which of he following are characteristics ofcloning vectors?
I they can replicate freely in host cells
II they are able to accept foreign DNA
III they harm the host cells
IV they are able to express the cloned genes
A I and III B II and IV
c I, IT and III D I, II and IV
40 Name the process of selecting a transformed bacterial clone
A Ligating B Cloning
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. 20
43 Which of the following statements about the organisms in the subkingdom protozoa are
true?
I. Amoeba uses pseudopodium for locomotion
II. Paramecium is.heterotroph
III. Euglena bas pellicle to maintain its shape
N . Euglena stores carbohydrate as paramyll.un
B I,II and N
C II,Ill andN
D I,ll,lliandN
44 . Flatworms of the phylum Platyhelminthes are
A Diploblastic and acoelomates
. B Triploblastic and acoelomates
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21
46 The diagram below shows a type of selection process.
Phenotype
The arrow shows the direction ofnatural selection. Which of he following examples can be
explainedby using the diagram above?
A Increased survival rate for newly born human babies with average weight
B Increased in antibiotic resistance among pathogenic bacteria
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22
48 Which of the reactions in the sulphur cycle occurs in Desulphovibrio?
A S ~ p h u r is ~ i d i s e d into sulphate ion
B · Hydrogen sulphate is oxiclised into sulphur
C Organic sulphur is e c o m p o s ~ into hydrbgen l p h a t eD. Hydrogen sulphate is oxidisedinto sulphate ion
49 Organisms that use the K strategy of survival
A Exhibit high efficiency in the use of resources
B EXperience a high birth and death rate.
C Do have a strong ability to compete.
D Have progeny that are small in size and number.
50 A plAAt ·sampling is done in area that covers 2 500m2. The number of plants in .25
. .
2
~ answer scheme
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STPM TRIAL EXAMINATION 2012
BIOLOGY 964/1
ANSWERSCHEMEFORPAPER1
Ql A
02 B
03 D
Q4 D
Q S cQ6 D
Q7 c-<58 A
~ 0 B
cQl1 B
Ql2 B
013 A
Q14 IC-015 D
01 6 A
Ql7 B
Qi 8 cQl 9 c
··o2o B
021 A022 D
Q23 D
Q24 c._!ES c
I
Q26 cQ27 A.
Q28 0 12.,Q29 D
Q30 B-Q3 1 B
Q32 cQ33 c03 4 D
Q35 B
Q36 B
Q37 D
Q38 B
Q39 D
Q40 B
Q41 cQ42 IDQ43 D ·
Q44 B
Q45 B
04 6 BQ47 B
- -1Q48 c ~49 ~QSO D
964/2answer scheme
STPM TRIAL EXAMINATION 2012
BIOLOGY 964/2
ANSWER SCHEME FOR SECTION A PAPER 2
Question ANSWER SCHEME
Ql a (i) X : Glycolysis
Y : Krebs/TCA!citric acid cycle
(ii) cytoplasm I ground cytoplasm I cytosol
b -Removal of hydrogen ions,- from pynivate/pyruvic acid to acceptor/ to coenzyme /not directly to
oxygen
c Removal of carbon dioxide
d (i) inner membrane of mitochondrion/ cristae
(ii)
- Oxidative Phosphorylation is a process which occurs in the ETS d.uring
aerobic respiration
- in which ATPs are synthesized from ADP and inorganic phosphate
- the process occurs in the inner membrane of the
mitochondri a/mitochondrial cristae- hydrogen atoms are transferred/ transported by hydrogen carriers such
as NAD from the Krebs cycle to the respiratory chain whereby
hydrogen carriers will transfer them along the chain
- the hydrogen atoms then split into protons and electrons and they aretransferred by electron carriers.
- At the end of he chain, protons and electrons recombine with oxygen to
produce water molecule (catalysed by cytochrome oxidase)/ the final
hydrogen acceptor is oxygen and water is produced
- ATP is synthesized during oxidative phosphorylation due to the driving
force from the flow of protons back to the matrix _o r e c o m b ~ n e with
electrons to produce hydrogen atoms
Total
Q2 a (i) The action potential is triggered only if the depolarization of he
membrane is above the threshold level, a stronger intensity of a
stimulus won't increase the size of t
(ii) Below the threshold level, the stimulationis not sufficient to
depolarize the membrane
b -70mV
Iv1ARKS
1
11
- --::---'---11
1
1
1
1
I
1
I
l
1
A.'ly 3
10 I
II
1
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