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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
INFORMATION FOR CANDIDATES
1. This question paper consists of two sections: Section A and Section B.
2. You are advised to spend 90 minutes to answer questions in Section A and 60
minutes for Section B.
1
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
Section A
[60 marks]
Answer all questions in this section.
1 Diagram 1 shows a plant cell, P and animal cell, Q.
Diagram 1
(a) On the cells P and Q, label the cell membrane, the nucleus and the cytoplasm.
[3 marks]
(b) Name two structures in cell P which cannot be found in cell Q.
(i) ....................................................
(ii) ....................................................
[2 marks]
(c) What is the function of the cell membrane?
..........................................................................................................................................
[1 mark ]
(d) (i) Name the system in which cell Q is found in the human body.
....................................................................................................................................
[1 mark ]
(ii) What is the function of cell Q?
....................................................................................................................................
[1 mark ]
2
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(e) (i) Name structure X.
....................................................................................................................................
[1 mark ]
(ii) What is the function of X in cell Q?
....................................................................................................................................
[1 mark ]
(iii) In the space provided below, draw and label structure X as seen under the
electron microscope.
[2 marks]
3
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
2 Diagram 2 shows the structure of a plasma membrane.
Diagram 2
(a) Name the parts labelled A to E .
A: .................................................. D: ..................................................
B: .................................................. E : ..................................................
C : ..................................................
[5 marks]
(b) (i) On which side of the membrane, X or Y , shown in Diagram 2, is the cytoplasm of
the cell?
....................................................................................................................................
[1 mark ]
(ii) Give one reason for your answer based on the evidence in Diagram 2.
....................................................................................................................................
[1 mark ]
4
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(c) State the functions of three named components of plasma membrane.
(i) Component 1: Glycolipid
Function: ....................................................................................................................
[1 mark ]
(ii) Component 2: Carrier protein
Function: ....................................................................................................................
[1 mark ]
(iii) Component 3: Cholesterol
Function: ....................................................................................................................
[1 mark ]
(d) The properties of the components of plasma membrane determine whether molecules
can pass through membranes.
Explain why plasma membrane is not permeable to most molecules.
..........................................................................................................................................
..........................................................................................................................................
[2 marks]
5
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
3 Diagram 3 shows the structures of protein. The protein structures can be classified into
four levels, J, K, L and M based on the organisation of their structures.
Diagram 3
(a) (i) Label X for amino acid and Y for peptide bond in J in Diagram 3. [2 marks]
(ii) Name the protein structures of L and M.
L: …………………………………………………………………………………...
M: …………………………………………………………………………………..
[2 marks]
(b) (i) Name the organelle in the cell where the protein is synthesised.
………………………………………………………………………………………
[1 mark ]
(ii) Name the process P in the following reaction.
P: ……………………………………………………………………………………
[1 mark ]
(iii) Which of the structures, J, K, L or M is represented by:
an enzyme? : …………………………………………………………
haemoglobin? : …………………………………………………………
[2 marks]
6
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(c) Explain why food should be kept in the refrigerator.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
[2 marks]
(d) A detergent for washing clothes contains enzymes. It recommends that clothes should
be washed at 40°C. Explain why.
..........................................................................................................................................
..........................................................................................................................................
[2 marks]
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
4 Enzymes are used in biological detergents.
(a) Name the type of enzyme that digests stains containing:
(i) fats: …………………………………………………………………………..
(ii) blood: …………………………………………………………………………..
[2 marks]
(b) A new detergent was recently manufactured by a factory. The performance of the new
detergent was compared to the existing detergent. The time taken by the two
detergents to remove a fat stain at different temperatures was measured. The graph in
Diagram 4 shows the results of the investigation.
Diagram 4
(i) Describe the effect of temperature increase on the time taken by the existing
detergent to remove the stain.
....................................................................................................................................
………………………………………………………………………………………
………………………………………………………………………………………
[2 marks]
(ii) Explain the difference in effectiveness of removing stains between the new
detergent and existing detergent.
………………………………………………………………………………………
………………………………………………………………………………………
[1 mark ]
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(iii) The new detergent is labelled as ‘environmentally friendly’. Explain why.
....................................................................................................................................
………………………………………………………………………………………
………………………………………………………………………………………
[2 marks]
(c) Both detergents do not work well at 60°C. Explain why.
…………………………………………………………………………………………..
..........................................................................................................................................
..........................................................................................................................................
[2 marks]
(d) Explain the specificity of enzymes.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
[3 marks]
9
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
5 Diagram 5 shows a food pyramid.
Diagram 5
(a) A, B, C and D are the different classes of food that make up the balanced diet.
(i) Name the class of food labelled C and D.
C: …………………………………………………………………………………...
D: …………………………………………………………………………………..
[2 marks]
(ii) State two functions of food in class C.
………………………………………………………………………………………
………………………………………………………………………………………
[2 marks]
(b) Too little of food from class B in our diet over a long period will give rise to health
problems. Explain why.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................[4 marks]
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(c) What disease is caused by deficiency of each of the following vitamins?
(i) Vitamin B1 (thiamine) : …………………………………………………………
(ii) Vitamin C : …………………………………………………………
[2 marks]
(d) Give one symptom of each of the diseases named in (c).
(i) ………………………………………………………………………………………
(ii) ………………………………………………………………………………………
[2 marks]
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
Section B
[40 marks]
Answer any two questions in this section.
6 (a) Diagram 6 shows a mature red blood cell, a motor neurone and a spermatozoon
(sperm).
Diagram 6
State how the structures are adapted to their functions. [10 marks]
(b)
(i) Based on the statement given above, describe how Amoeba can carry out the
following life processes: nutrition, reproduction and sensitivity towards acid.
(ii) Explain why Amoeba does not require organ systems such as the respiratory
system found in multicellular organisms.
[10 marks]
12
Amoeba is a unicellular organism but it can function as a complete unit of life.
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
7 Two experiments were carried out to study two processes.
Diagram 7.1 and Diagram 7.2 show the experimental set-ups at the beginning of the
experiments.
Diagram 7.1 Diagram 7.2
(a) (i) What are the two processes studied in Diagram 7.1 and 7.2? [2 marks]
(ii) Draw and label two diagrams to show the expected results at the end of the two
experiments respectively. [2 marks]
(iii) Explain the observations at the end of these experiments. [6 marks]
(b) Diagram 7.3 shows a food preservation technique.
Diagram 7.3
Explain the principles applied in each step of this food preservation technique.
[5 marks]
13
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
(c) Diagram 7.4 shows the level of two sucrose solutions at different concentrations in a
U-tube at the beginning of an experiment.
Diagram 7.4
Draw a diagram to show the observation at the end of the experiment. Explain your
observation. [5 marks]
14
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
8 Sucrose and glycogen are carbohydrates from which our body obtains energy.
(a) What is carbohydrate? [2 marks]
(b) Name the three different classes of carbohydrates. Give an example of each of the
named class and its function. [9 marks]
(c) How is a complex carbohydrate broken down into simple sugars? Explain with at
least one example. [5 marks]
(d) How do you identify whether starch and reducing sugars are present in an unknown
sample of food? Explain. [4 marks]
15
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SEKOLAH ISLAM ADNIFirst Semester Examination 2011
Biology – Paper 2
Secondary 4 (KBSM)
17