[edu.joshuatly.com] trial malacca stpm 2012 biology paper 1 [a6dce16b].pdf

7/27/2019 [edu.joshuatly.com] Trial Malacca STPM 2012 Biology Paper 1 [A6DCE16B].pdf

http://slidepdf.com/reader/full/edujoshuatlycom-trial-malacca-stpm-2012-biology-paper-1-a6dce16bpdf 1/23

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



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



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?



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



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



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



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



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?



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



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



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



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



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?



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)



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



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?



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



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?



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



. 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



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



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



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

1http://edu.joshuatly.com/ http://fb.me/edu.joshuatly

[edu.joshuatly.com] trial malacca stpm 2012 biology paper 1 [a6dce16b].pdf

Documents