Bio k 2 Percubaan Sbp 2007 PDF September 2 2007-6-46 Pm 648k

8/6/2019 Bio k 2 Percubaan Sbp 2007 PDF September 2 2007-6-46 Pm 648k

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SEKTOR SEKOLAH BERASRAMA PENUH

BAHAGIAN SEKOLAH

KEMENTERIAN PELAJARAN MALAYSIA

PEPERIKSAAN PERCUBAAN

SIJIL PELAJARAN MALAYSIA 2007

BIOLOGI

Kertas 2

Dua jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Untuk Kegunaan Pemeriksa

Bahagian Soalan Markahpenuh

Markahdipeolehi

1 13

2 12

3 12

4 12

A

5 11

6 20B

7 20

8 20C

9 20

Jumlah 100

1. Kertas soalan ini mengandungi tiga bahagian.

Bahagian A, Bahagian B dan Bahagian C. Jawabsemua soalan dalam Bahagian A, satu soalan

daripada Bahagian B dan satu soalan dari Bahagian

C2. Jawapan kepada Bahagian A hendaklah ditulis

dalam ruang jawapan yang disediakan dalam kertas

soalan. Langkah penting dalam kerja mengira

hendaklah ditunjukkan.

3. Jawapan kepada Bahagian B dan Bahagian C

hendaklah ditulis pada ruang jawapan yang

disediakan. Anda diminta menjawab dengan lebihpanjang untuk Bahagian B dan Bahagian C tetapi

jawapan mestilah jelas dan logik. Dalam jawapan

anda, persamaan, gambar rajah, jadual, graf dan cara

lain yang sesuai untuk menjelaskan jawapan anda

boleh digunakan.

4. Jawapan kepada ketiga-tiga bahagian ini hendaklah

diserahkan bersama-sama. Anda hendaklah

menyerahkan kertas tulis dan kertas graf tambahan.

5. Penggunaan kalkulator saintifik yang tidak boleh

diprogramkan adalah dibenarkan.

Kertas soalan ini mengandungi 29 halaman bercetak

Nama:

Tingkatan:.4551/2

Biologi

Kertas 2

Ogos

2007

2

12 jam

4551/2 @ 2007 Hak cipta Sektor Sekolah Berasrama Penuh [Lihat sebelah

SULIT


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Section A

[ 60 marks ]

Answer all questions

1. Diagram 1.1 shows the relationship between a cell, chromosome, DNA, genes and

bases

DIAGRAM 1.1

a) On Diagram 1.1 , mark and label of the following terms :

i) DNA

ii) Bases

iii) Chromosomes

[3 marks]

b) State the chromosome number of the cell shown in Diagram 1.1

[ 1 mark ]

genes

1(a)

1(b)

Cell

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c) What can you deduce about genes based on Diagram 1.1 ?

..

..

.

[ 1 mark ]

d) Diagram 1.2 represent parts of a molecule of DNA

DIAGRAM 1.2

i) Name a unit of DNA.

..

[ 1 mark ]

ii) What is K ?

[ 1 mark ]

A

T

G

A unit

of DNA

K

1 (c)

1 (d)(ii)

1(d)(i)

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iii) Complete the Diagram 1.2 to show that DNA molecule consist two

strands that joined together by hydrogen bond.[ 3 marks ]

e) Diagram 1.3 shows the karyotype of a normal person and a person with

Cri-du-Chat syndrome

DIAGRAM 1.3

i) Determine the sex of person with above karyotype.

[ 1 mark ]

Normal person

1 (d) (iii)

1(e)(i)

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ii) Based on the Diagram 1.3, explain why Cri-du-chat syndrome occur ?

.

[2 marks ]

1(e) (ii)

TOTAL

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2. Diagram 2 shows a cross section of a leaf .

DIAGRAM 2

(a) (i) Name the structure labelled Q.

..

[1 mark ]

(ii) State two tissues that form the structure named in (a)(i)

1. .

2. .

[2 marks]

P

Stoma

Q

2(a)(i)

2(a)(ii)

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(b) Explain how the structure labelled P in Diagram 2 is adapted for optimal

photosynthesis.

..

.

.

.

[ 3 marks ]

( c ) Explain how the above statement enables the following plants to carry out

photosynthesis at an optimum rate.

i) Aquatic plants

.

.

.

[2 marks]

ii) Desert plants

.

.

..

[ 2 marks ]

In different habitats, plants have different distribution ofstomata and chloroplasts.

2(b)

2 (c)(i)

2(c)(ii

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d) Explain the important of green plant to living organism.

..

..

..

[ 2 marks ]

3. A man has the free earlobe as shown in Diagram 3.1, married to woman with

same type of earlobe as shown in Diagram 3.2.

2(d)

DIAGRAM 3.1 DIAGRAM 3.2

TOTAL

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Their children P, Q, R, S, T, and V have trait, as shown in Diagram 3.3

P girl Q - boy R girl

S boy

Attached earlobe

T- boy V girl

DIAGRAM 3.3

(a) Based on the Diagram 3.3 which of the earlobe trait is dominant ? Explain your

answer.

.

.

[2 marks]

(b) Explain whether the trait is inherited as sex- linkage inheritance?

.

.[2 marks]

3(a)

3(b)

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(c) If E is a dominant allele for earlobe trait, and e is recessive allele, draw aschematic diagram this inheritance of earlobe trait.

[5marks]

3(c)

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(c) (i) What type of variation shows in earlobe inheritance?

[ 1 mark ]

(ii) State how this type of variation is caused

.

.

.

[1 mark]

(d) Diagram 3.4 shows a species of moth in industrial area. The originalmoth is white .

DIAGRAM 3.4

Based on the diagram define what is mutation?

.

.[ 1 mark]

3(c)(i)

3(i)(ii)

3(d)

TOTAL

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4. Diagram 4.1 shows a part of the circulatory system in human.

DIAGRAM 4.1

a) What happens to the blood pressure as the blood flow from P to Q ?

.[ 1 mark ]

b) Explain why is important for P to have thick wall.

.

.

.

[ 2 marks ]

4(a)

4(b)

QP

From heart

To heart

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Blood capillaries


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c) Explain how nearby muscle at Q prevent the back flow of blood.

.

.

.........................................................................................................................................

[ 2 marks ]

d) Explain how the structure of capillaries allow substances to pass from them to

the surrounding efficiently.

[ 3 marks ]

4(c )

4(d)

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e) (i) Sketch graph to show average blood pressure at P, capillaries, Q in Diagram 4.2

[ 1 mark]

P capillaries Q

Position in circulatory system

DIAGRAM 4.2

e (ii) Our normal blood pressure is 120/80 mmHg. Explain what the figure represent.

.

.

.[ 3 marks]

Blood

pressure

4(e)(i)

4 (e) (ii)

TOTAL

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5. In natural ecosystems, there is competition between members of the same species as

well as between different species.

a) Explain how competition between members of the same species helps to control

population growth.

[ 2 marks ]

b) Crop plants must compete with weeds for the same resources. Farmers

control weeds by spraying herbicides(weedkillers).State two factors that the crop plants and weed may compete for and explain the

importance of each.

Factor 1 : ...

Explanation : ..

[ 2 marks ]

Factor 2 : .

Explanation : .

[ 2 marks]

5(a)

5(b)

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c) Two species of the flour beetle, compete with each other for flour. Both are parasitized

by a protozoan .The graph in Diagram 5 show the changes in numbers of the twospecies over 900 days when a parasite is absent and when it is present.

DIAGRAM 5

i) Which species is the most successful when the parasite is absent ? Explain

your answer.

.

.

..

..

[ 3 marks ]

5(c )(i)

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ii) Explain the effect of the parasite on the relative success of the two beetles.

.

.

.

[ 2 marks ]

5 (c) (ii)

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Section B

[ 20 marks ]Answer any one question

6. Diagram 6.1 shows parent cells undergoing cell division.

DIAGRAM 6.1

a) Based on the Diagram 6.1

i) What is the process shown ? State the significant of the process.

[ 4 marks ]

ii) Draw and explain the phases involved to produce daughter cells .[ 10 marks ]

Cell division


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b) Diagram 6.2 shows a group of cells that is exposed to ultraviolet ray.

DIAGRAM 6.2

The exposure drives the cell cycle malfunctions. Based on the Diagram 6.2 describe

effect of cell cycle malfunctions to the body.[ 6 marks]


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7. Diagram 7 shows the development of a human zygote.

DIAGRAM 7

a) Describe the processes from P to Q .[ 4 marks ]

b)

Explain the above statement in terms of the development of foetus.

[ 6 marks]

Pregnant women are advised not to smoke and avoid

from drugs and alcohol.

P

Q

two cells

stage

Fallopian

Tube


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c) The fallopian tubes of a married woman are blocked, making it impossible for herto conceive through the natural process. She and her husband insist to have their

own child . Explain one modern technique that can be used by the childless

couple to conceive. Justify your choice.

[ 10 marks ]


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Section C[ 20 marks ]

Answer any one question.

8. Diagram 8 shows the assimilation of digested food in the organ and body cell.

DIAGRAM 8

a ) Based on Diagram 8 , explain the assimilation of the following types of

food

( i ) glucose( ii ) amino acids

( iii ) lipids

[ 10 marks ]


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b) Energy requirement for a girl aged 15 is 9000 kJ daily.Table 1 shows types of food, quantity and energy content of her daily

menu.

Types of food Quantity taken

( g )

Energy Content

( kJ /100 g )

Rice 350 1500

Chips 150 1000

Roasted Chicken 300 800

Grilled Beef 200 1200

Boiled potato 150 500

Chocolate 100 2500

Yoghurt 200 200Egg 100 600

TABLE 1

Calculate the total energy value taken by the girl daily .If she continues to take the menu everyday for a long time, explain the

consequences of the habit to her health.

[ 10 marks ]


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9. (a) Diagram 9 shows a ball and socket joint with tissues P, Q and R

which are responsible for locomotion in a human.

DIAGRAM 9

Explain the role of the structures above in the locomotion.

[ 10 marks ]

(b) Some drugs and steroids may have good effect as well as badeffect on nervous system and the activity of mucles. There are

other alternatives instesd of consuming drugs and steroids which

probably a better choice for sustaining good health of the muscles

and nervous coordination over a long period of time.

Justify the arguments above based on biological point of view.

[10 marks]

END OF QUESTION PAPER


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SPACE FOR ANSWERS

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SPACE FOR ANSWERS


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SPACE FOR ANSWERS


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SPACE FOR ANSWERS


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SPACE FOR ANSWERS


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Bio k 2 Percubaan Sbp 2007 PDF September 2 2007-6-46 Pm 648k

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