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96411 PERCUBAAN STPM 2009

BIOLOGY (BIOLOGI)

PAPER 1 (KERTAS 1)

MULTIPLE-CHOICE (ANEKA PILIHAN)

One hour and forty'ive minutes (Satu jam empat puluh lima min it)

PEPERIKSAAN PERCUBAAN BERSAMA SIJIL TINGGI PERSEKOLAHAN MALAYSIA (STPM) 2009

ANJURAN PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA

SEKOLAH MENENGAH MALAYSIA (PKPSM) KEDAH

Instructions to candidates: DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO.

There are fifty questions in this paper. For each question, four suggested anwers are given. Choose one correct answer and indicate i( on the multiple~hoice answer sheet provided.

Read the instructions on the multiple-Choice answer sheet very carefully.

Answer all questions. Marks will not be deducted tor wrong answers.

Arahan kepada calon:

JANGAN BUKA KERTAS SOALAN INI SEHINGGA ANDA DIBENARKAN BERBUAT DEMIKIAN.

Ada lima puluh soa/an dafam kertas info Bag; setlap 5oa/an, empat cadangan jawapan diberikan. Pilih satu jawapan yang betul dan tandakan jawapan flu pada he/aian jawapan aneks pilihan yang dibekaJkan.

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Baca arahan pada hefaian jawapan aneka pifihan itu dengan teliti.

Jawab semua soa/an. Markah tidak akan ditolak bagi jawapan yang safah.

This question paper consists of 35 printed pages (Kertas soalan ini terdiri daripada 35 halaman bercetak)

." .... _. ---,-- ,-, ..... " , .... -_ ... :_--- ----..:,----- ,._--- :-, ._ -_. [Lihat sebelah

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The diagram below shows the Suucture of steroid hormone.

o

This s,!W!d hormone is known as

A Progesterone B Testosterone-C O1olesterol D OestrogCTlI

2 Which of the following statements is true about tdglyceOdcs?

A It has lower calorific value Iban carbohydrnte)' B II forms hydrogen bonds with water molecule,.. C It is more dense than w3ter. It It has a higher hydrogen to oxygen ratio compared to carbohydrates.

3 Which afthe following statement is true about eukaryotes and prokaJ'yotes7

Prokaryotes E!!J

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5 Which statement best explains ~hy .c~~~~iftc in their action? A Enzymes have polypeptide chainsl B Enzyme.,> have large fibrous protein ' C Enzymes are not changed orcoosUlned during reactio!l.\ o Enzymes have spccificswfaceconfiguration

6 lbe Lineweaver-Burl:: plot below shows an enzyme-catalysed reaction.

7

v With

:~.~~~vor .-,.--

Without inhibitor

[sl

Which of the foDowing is true for values P and S on the graph?

P A I

K. B

C K.

I

~~ .,. ~~ K. K.

Bundle Sheath Cells

Mesophyll cells

5

Calvin Cycle

\,"

oxaloacetate---- -----'l X

What do X, Y and Z represent?

X A Malate B Phosphoenoi pyruvate C Carbon dioxide D Phosphoenol pyruvate

y ~ Phosphoenol pyruvate

Malate Malate Pyruvate

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Z Carbon dioxide Carbon dioxide Phosphocnoi pyruvate Hexose phosphate

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8 Which enzyme catalyses the fixation of carbon dioxide in the chloroplast of~ mesophyU ceUs? ,/"-

, A PEP carboxylase B OxaJoacetate C RuBPcarboxylase D Malate.

9 Which of the ronowing reactions in glycolysis is catalysed by RJQspboi~okinase?

A B ('

-D

Fructose I ,6-

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11 The graph below shows the oxygen dissociation cutVe of human haemoglobin under different partial pressures of carbon dioxide.

100 r-

~ :~ , ,--~ ............... ... .

i ,' .f .. l '0 00 ...

I .. ,/' i 1 f ~

~

.,

I I

! I :j. ... ....

.. "" ... , .. --.- -

'" OJ PriIII Pf85Ue 0/ oxygeMmi Hg

Arrange the above oxygen dissociation curve based on the ~~c:t.ing.ordcr-O(par!:ial pressure

of carbon dioxide.

A . P~Q~R B P~R~Q C Q~P~R D R~Q~P

12 Why is haemoglobin an efficient transporter of oxygen? A It can bind with oxygen at very low partial pressures of oxygen B It dissolves in the plasma C It contains nuclei B - (tcontains haem prosthetic group that has ferum atom at its core.

13 The following table shows the phases of cardiac cycle. Which of the following correctly matches each phase of cardiac cycle and its event?

A B p

D

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Phase p) Diastole..

q) Systole

p q p p

II q p .p q

Event l) Atria and ventricles relax. II) Blood flows into the right and left atria. UJ) Ventricles contract IV) Atrioventricular valves close and semilunar vaJvesopen . .

ill

P q q q

IV q

P q

P

*Thl.,. ", .,,ti .... ........ ,., ........ ~ ;~ """"''''~ I I'''\r:''' .... ' .. ,

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14 Which of the following statements are not true about Casparian Strip?

r It covers the whole endodermis ceuT IT It consists of suberin, which is impenneabJe to water". ill It is a thickening strip of endodennis cell r:I It ensures that water crosses the root through the apoolast pathway only.

A Jandll only B nand IYonly C ill and IV only I) I and IV only

15 Which factors affect the opening and closing of stomata? .

Concentration of oxygen II Changes in lhe potassium ion concentration in the guard cell Hi Omnges in the starch-malate equilibrium W Cin:adian mythms.

A land U only -ll- . U, ill and IV only C I, ill and IV only D I, u,m and IV

J 6 Which homlOne triggers closing of the stomata when soil water is insufficienllo keep up with transpiration.

A Abscisic aciu (, B AntidiweLic OOrmotll C Auxin Jl ' Gibberellin

17 WalerdiffU5CS into the cytoplasm of one cell and moves from cytoplasm to cytC!plasm through the pL'l

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18 Which hypothesis of translocation in phloem assumes that energy required for translocation is obtained from a potential difference across a sieve' plate?

A Cytoplasmic streaming hypothesi~ B Cohesion-tension hypothesis. . Electro-osmosis hyphOlhesis D Perista1tic wave hypolhesis

19 The diagram below shows changes in osmotic concentration in the Loop of Henle.

Descending 11mb

300

1200

100

Ascending 11mb

Which of the following causes a ig..wering of tile os.mot:ic concentration in the ascending limb?

A The decending limb is penncable to dissolve saJutcs).. q. . The ascending limb is penneable to urea. C The ascending limb is penneable to water:' D Na+ andCl" ions moveOUl of the ascending limb by active transport ,.

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20 Which of the following statements about the e~,\~s .~~Q. acid in manunal's protein metabolism are true?

Deamination occurs and amino acid is excreted as arpQJOnia in urine. n Deaminalion occurs and amino group is excreted as u~. , ill Excreted as albumin in urin~ 1'\i' Produces other amino acid needed through trdnsamination

A I and 0 onl)l- ' B I and III onl~ {; 1I and IV only o 1Il and IV only

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23 The diagram below shows the life cycle of Dryopter;s. Cll Y'

,.- P Zygote

~ Egg cell Anthero7.oid

f f Archegonium Anlheridium

'-- " \' " R What do P,Q and R represent? p Q

A Gametophyte Meiosis B Gametophytc Sporophyte C Sporophyte Gametophytc po Sporophyte Meiosis

...

24 In the life cycle of Mucor sp. mei

A Development of oospheres B Fonnalion of male and femaJe gamete - The fommtionof sporangiwn o Development of the zygote

--SorUli l

S~r1.Dgium :

..l ) ... f' Q \

T S~!"_

--R

Sporophyte Meiosis Meiosis Grunetophyte

25 Which of the following is the cell-medialed response in inununity?

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A Tlymphocytcs hY9ro1y'se infected CII. B ~J.Watjon of ceUs occurs. e Pathogen are destroyed by the action of cytotoxic effcctor T cells. D Immunoglobulin are produced. ; .

Th; ............... : .... ~~ ........ r : ... ,.... ....... 'r-' ... .-.' ... ,A' .. _., ..... __ .. _ . __ __

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26 TIle table below shows some plant honnones and their functions.

Honnone Functions (a) Auxin ) Promotes 'bolting' in some roselle plants. (b) Abscisic acid U Promotes fruit ripening. (c) Ethene - f , ill Promotes abscission of fruits and leaves. (d) Gibberellin " J IV Promotes stem elongation. (e) CytoIcinin I V Promotes cell division and delays leaf senescence

Which of the following is the correct match?

(a) (0) (C) (0) (e)

IA I ill I V V B IT I IV V III

~ III IV I V U ' I IV UJ I V

27 The statements below refer to the mechanism ofhonnone action .

.......r- 'The honnone binds with a specific receptor on the cell membrane. n The hOllllOne crosses the ceD membI'alK\.

-m- The honnone-receptor complcJt binds with a G protein . ....lY. Adenyl cyclase hydrolyses ATP.

V Activation of specific genes in the DNA.,

Which of the statements describe the action of adrenaJ~?

A U andV B I, U and IV e' I, III aod IV D I, n , maodV

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28 The table below shows three types of germ layers and the tissues or organs which are fonned from iL Which ofthc following combinations are correct?

Layers I Ectoderm (8)". ~ Mesodenn (b) , . -II Endodenn (e) " I'm

A (a)(I), (b)(I.I), (e)(III) If (a)(lli), (b)(ll), (e)(I) C (a)(Ill) , (b)(J), (e)(I.I) D ". (a)(ln , (b)(I)