20156302 biology paper 2 question l

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SULIT bio 2 trial perak 2007 4551/2

Biology

Paper 2

September

2007

2

2

1hours

JABATAN PENDIDIKAN NEGERI PERAK

DARUL RIDZUAN

PEPERIKSAAN PERCUBAAN SPM 2007

__________________________________________________

BIOLOGY

Paper 2

Time: 2 hour 30 minutes

__________________________________________________

DO NOT OPEN THIS QUESTION PAPER UNLESS YOU ARE TOLD TO DO SO

__________________________________________________________________________________

Question paper consists of 14 printed pages

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For examiner usage

Section Question Marks

A

1

2

34

5

Total

B6

7

Total

C8

9

Total

Main Total

1. This question paper contain 3 sections:Section A, Section Band Section C. Answer allquestions in Section A, one

question from Setion B and one question from Section C.

2. Write your answer in spaces given for Section A. For anycalculation , you have to show all the steps involved.

3. Write the answer for SectionB dan Section C in your testpad. The answer for Section B and C must be longer, clear

and logic.You can use equations, diagrams, tables, graphs or

any other suitable method for the explanation.

4. The answer for all three section include any extra answeringpaper or graph paper, must be handed together

.

5. Diagrams given will give you some informations foranswering the question. Diagras or figures did not draw

according to scale unless stated.

6. You can use simple scientific calculator.

7. You are advised to use 90 minutes to answer Section A, 30

minutes for section B and 30 minutes for Section C.

NO. KAD PENGENALAN

ANGKA GILIRAN


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Section A

(60 marks)

Answerallquestions in this section.

The time suggested to complete this section is 90 minutes.

1. Diagram 1(a) shows the structure of a typical plant cell.

Diagram 1(a)

(a) Label the structures P, Q, R and S. (4 marks)

(b) (i) What is the component of P?

........

(1 mark)

(ii) State one characteristic of P?

....

(1 mark)

(c) (i) Name the process in R?

(1 mark)

(ii) Write an equation for the process mentioned in 1(c)(i).

(2 marks)

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P

Q

R

SS


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Diagram 1(b)

(d) (i) Diagram 1(b) shows two specialised cells , M and N.

Name M and N.

M: .......

N: ............(2 marks)

(ii) State one characteristic of M and N that help them to carry out their function

effectively.

M: .......

N: ............

(2 marks)

2. A stalk of mustard green is cut longitudinally into three equal strips. The shape of the

strip is shown in Diagram 2. Each strip is placed into beakers A, B, and C respectively.

Beaker A contain distilled water, beaker B contain 0.5M sucrose solution and beaker C

contain 1.0M sucrose solution.

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M N


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Diagram 2

(a) Draw the shape of each strip after 30 minutes. Label the epidermis.

( 3 marks)

(b) State the condition of the cells in the strip that have been immersed in

(i) Beaker A: .

(ii) Beaker C: .

(2 marks)

(c) (i) Explain why the cells are in the conditions mentioned in 2(b)(i) and 2(b)(ii).

Beaker A :

.

Beaker B:.............................................................................................................

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B

C

A


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.

(4 marks)

(ii) If strip C is transferred into beaker A, describe what will happen to the

cells in the strip C.

(2 marks)

(d) Sample of red blood cells is placed in beaker C. Predict the condition of the red

blood cells after 20 minutes.

.

(1 mark)

Diagram 3(a) shows a cell cycle.

Diagram 3(a)

(a) (i) Name the stage P and Q

P:.

Q:.....

(2 marks)(ii) Describe the importance of stage P in the cell cycle.

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P

Q


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(2 marks)

(iii) What happens in Q?

(1 mark)

Diagram 3(b)

(b) Diagram 3(b) shows a stage of mitosis in a somatic cell of organism.

(i) Name the stage shown in Figure 3(b)

(1 mark)

(ii) State the diploid number of chromosomes in the parent cell.

(1 mark)

(c) (i) Draw two daughter cells that will be produced at the end of the process

shown in Diagram 3(b).

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(2 marks)

(ii) Based on the diagram drawn in (c)(i), describe the importance of

mitosis.

.

.

.

(2 marks)

(d) State one application of mitosis in agriculture.

.(1 mark)

4. Diagram 4 shows human lung.

Diagram 4

(a) (i) What is the function of alveoli?

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

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(1 mark)

(ii) State one characteristic of alveoli that ensure the function in (a)(i) is carry out

efficiently.

....................................................................................................................................(1 mark)

(b) (i) Respiratory gases flow in and out through the trachea.

Describe the characteristic of trachea.

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

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

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

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

(2 marks)

(ii) Draw an arrow to show the flow of oxygen and carbon dioxide in Diagram 4.

(2 marks)

(iii) Describe how intercostal muscle and diaphragm can change the volume and

pressure in the thoracic cavity during inhalation.

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

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

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

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

(3 marks)

(c) What are the differences between respiratory system, of human and fish?

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

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

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

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

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

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

(3 marks)

5. Diagram 5(a) and Diagram5(b) show a nephron in human kidney.

Diagram 5(a)

Figure 5(ii)

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P

Q

Convoluted tubule

Loop of Henle

Collecting duct


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Diagram 5(b)

(a) (i) Label P and Q

P:..

Q: .

(2 marks)

(ii) State one characteristic of Q.

...

...

(1 mark)

(b) (i) Name the process that happens between P and Q.

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

(1 mark)

(ii) Describe the process mentioned in (b)(i).

(3 marks)

(c) Explain how antidiuretic hormone controls water absorption in the convoluted

tubule and collecting duct.

...

...

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...

...

..

(4 marks)

Section B

(20 marks)

Answerany one question.


6 (a) Diagram 6 shows development of the follicles in the female ovary, thickening

of uterine endometrium and the hormones involved.

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Estrogen


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Diagram 6

Explain the relationship between the development of the follicles, changing of therespective hormonal level in the blood and the thickening of the uterine

endometrium in a female.

(10 marks)

(b) Graph 6.1 and Graph 6.2 show the growth curves of human and insect.

Based on the graphs, compare the growth processes in human and insect.

(10 marks)

Graph6.1: Growth curve for human

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Time (Day)

Height(cm)

Time (year)

Length(cm)

Time(day)


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Graph 6.2: Growth curve for insect

7 (a) Diagram 7.1 shows a human circulatory system. Based on Diagram 7.1, explain

how respiratory gases being transported in human body.

(10 marks)

(b) Diagram 7.2 shows the direction of water flow from the soil to the plant then to

the atmosphere.

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Water

Diagram 7.1


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Diagram 7.2

(b) Based on Diagram 7.2, discuss how do water molecules from the soil enter the

root cells and loss during the process of transpiration.(10 marks)

Section C

(20 marks)

Answerany one question.


8. (a) Adam have brown hair and brown eyes. He is married to the woman

who have black hair and black eyes. Explain how their daughter will has

black hair and brown eyes. (The trait of black eyes and black hair are

dominant over brown eyes and brown hair)

(10 marks)

(b) Abdul is suffered from haemophilia. He is married to Aminah who is a

carrier. Discuss how this sex-linked disease is inherited by their children.

Give your justification.

(10 marks)

9 (a)

Based on the above statement:

(i) Define dynamic equilibrium.

(2 marks)

(ii) Explain how the dynamic equilibrium in a prey predator relationship is

maintained?

(8 marks)(b)

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Water

In any ecosystem, there are interactions between organisms. These interactionsare needed to form a balance ecosystem. A prey predator relationship is one

of the interaction that involved self regulating and keep the population of both

the predator and prey in a dynamic equilibrium.


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Diagram 9

Diagram 9 illustrates the level of oxygen (O2) and Biological Oxygen

Demand (BOD) in a river due to sewage effluent. Based on your biological

knowledge, discuss why such changes in the level of O2 and BOD occurred.

(10 marks)END OF QUESTION PAPER

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20156302 biology paper 2 question l

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