Biology Paper 2 (question)l

SULIT bio 2 trial perak 2007

NO. KAD PENGENALAN

Biology Paper 2 September 2007 2

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ANGKA GILIRAN

1 hours 2

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 For examiner usage Question Marks 1 2 A 3 4 5 Total 6 B 7 Total 8 C 9 Total Main Total

1. This question paper contain 3 sections: Section A, Section BSection and Section C. Answer all questions 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 any calculation , you have to show all the steps involved.

3. Write the answer for Section B dan Section C in your test pad. 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 answering paper or graph paper, must be handed together .

5. Diagrams given will give you some informations for answering 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.

__________________________________________________________________________________ Question paper consists of 14 printed pages

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Section A (60 marks) Answer all questions 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. P Q

S R

Diagram 1(a) (a) Label the structures P, Q, R and S. marks) (b)

(4

(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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M

N 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.

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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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Diagram 2

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

A

B

C ( 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 :……………………………………………………………………… ………….………………………………………………………………………

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Beaker B:............................................................................................................. …………………………………………………………………………………. (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) 3. Diagram 3(a) shows a cell cycle.

P Q

Diagram 3(a) (a)

(i) Name the stage P and Q P:……………………………………………………………………………. Q:………………………………………………………………………...….. (2 marks)

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

(c)

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

(d)

…………………………………………………………………………… (2 marks) State one application of mitosis in agriculture. …………………………………………………………………………………. (1 mark)

4.

Diagram 4 shows human lung.

Diagram 4 (a)

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(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.

P Q

Diagram 5(a)

Convoluted tubule Collecting duct

Figure 5(ii) Loop of Henle

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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. ……………………………………………………………………………………………… ……………………………………………………………………………………………... ……………………………………………………………………………………………... 4551/2

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……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………... ……………………………………………………………………………………………... …………………………………………………………………………………………….. (4 marks)

Section B (20 marks) Answer any one question. The time suggested to complete this section is 30 minutes. 6

(a) Diagram 6 shows development of the follicles in the female ovary, thickening of uterine endometrium and the hormones involved.

Estrogen

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Time (Day) Diagram 6 Explain the relationship between the development of the follicles, changing of the respective 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)

Height (cm)

Time (year)

Graph 6.1: Growth curve for human Length (cm)

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Time(day)

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Graph 6.2: Growth curve for insect

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(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)

Diagram 7.1 (b) Diagram 7.2 shows the direction of water flow from the soil to the plant then to the atmosphere. Water 4551/2

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Water 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) Answer any one question. The time suggested to complete this section is 30 minutes. 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)

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(a) In any ecosystem, there are interactions between organisms. These interactions are 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. Based on the above statement: (i) Define dynamic equilibrium. (2 marks) (ii) Explain how the dynamic equilibrium in a prey – predator relationship is

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maintained? (8 marks) (b)

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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