Module 2

Perfect score SBP Biology 2009

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BAHAGIAN SEKOLAH BERASRAMA PENUH DAN SEKOLAH KLUSTER

KEMENTERIAN PELAJARAN MALAYSIA

Student’s Copy

PERFECT SCORE BIOLOGY

2009 MODUL II

ESSAY QUESTIONS

DISEDIAKAN OLEH:

1. Puan Hasimah binti Azit – Sekolah Seri Puteri, Cyberjaya 2. Puan Natrah binti Mohamad – SMA Persekutuan Kajang 3. Puan Mardiana binti Yusof – SMS Hulu Selangor 4. Puan Sarah Safarina binti Sabri- Kolej Islam Sultan Alam Shah 5. Puan Kamariah binti Zailan – SMA Persekutuan Labu 6. Puan Siti Asma binti Radzali 7. Puan Noorsyamsinar binti Kasim


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Question 1:

Diagram 1 shows a reaction catalyzed by sucrase.

(a) Based on Diagram 1, explain the characteristics of an enzyme.

(6 marks)

(b)

Enzymes are widely used in our daily life and industries. Based on the above statement, explain how enzymes are used in the food industry. [4 marks]

M

N Q

P


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Question 2:

A study is carried out on two individuals X and Y. They asked to drink glucose solution of the same volume and concentration. The glucose and insulin level in the blood is measured. The graph in Diagram 2 shows the changes in concentration of glucose and insulin in the blood of individuals X and Y. The concentration of glucose in a normal individual is 0.09 gdm-3 (a) Explain the differences between the graph of individuals X and Y in relation to:

(i) blood glucose concentration

(ii) insulin concentration in the blood [10 marks]


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Question 3: Diagram 3 shows the longitudinal section through the thorax of a man.

Diagram 3

Describe briefly the mechanism of breathing in man. In your answer describe the part played by the (i) diaphragm (ii) intercostal muscle (iii) alveoli (10 marks)

Question 4:

Why do we need to practice good posture? Explain how we can practice good postures while standing, sitting, walking and lifting heavy objects.

[10 marks]

Question 5: Reproduction technology has contributed a lot to human health and population growth. Describe how fertility is overcome in humans using the following methods: • Sperm banking • Artificial insemination • In vitro fertilization • Surrogate mother [10 marks]


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Question 6 The figure below shows a fluid mosaic model of the plasma membrane

(a) Explain the functions of the structures X, Y and Z in the movement of substances across the

plasma membrane [4 marks]

(b) All movements of substances have to pass through a plasma membrane. Explain why the plasma membrane is known as a semi permeable membrane

(6 marks)

Question 7:

(a) Explain how the first line of defence can prevent the entry of pathogens into the body [6 marks]

(b) Explain the effect of taking fatty foods that have high cholesterol content to human healthy life.

[4 marks] Question 8:

(a) Explain the principle involved in genetic engineering [2 marks]

(b) Discuss the importance of genetic engineering in the medical and agricultural field.

[4 marks]

(c) Diagram 8 shows DNA finger printing. DNA finger printing is more scientific, accurate and advanced compared to the thumbprint in criminal investigation.


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Discuss the use of DNA fingerprinting in the identification of the parents of a child. Based on your answer, identify the father of the child.

[4 marks]

Question 9: Diagram 9 shows organism, P, Q and R. P Q R

Diagram 9

(a) (i) Describe the type of nutrition in P and Q. [4 marks]


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(ii) Explain one similarity and four differences between the alimentary canal of Q and R. [6 marks]

Question 10

Based on your biological knowledge discuss the above statement. [10 marks]

Question 11: The diagram shows a human activity.

a) Explain briefly why humans carry out the activity as shown in diagram above.

[4 marks ]

b) Explain the important ecological roles of the tropical rainforest.

[6 marks]

c) i) Explain the impacts of the activity shown above on the environment.

[7 marks]

ii) Suggest methods to control the mentioned activity.

[3 marks]

Pregnant mother, infants and teenager require different energy daily. Each target group needs to choose a diet appropriate to its needs.


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Question 12:

Activities that carried out by the human to provide food, power and industrial needs

have a extensive effects on the environment. These effects include atmospheric

pollution, water pollution, destruction of habitats and communities and a natural

phenomenon known as the greenhouse effect.

d) Explain the fenomena of greenhouse effect and problems caused by this

fenomena.

( 10 marks )

e) Suggest two measures which can be employed in the management of

development activities and the ecosystem to ensure that the balance of nature is

maintained.

( 10 marks )


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Question 13:

(a) The shaded area of the graph in Diagram1 shows the intake of oxygen by an athlete before, during and after running for five minutes.

Based on the graph , explain how an oxygen debt is built up when an athlete is running and how it is settled after he stops running.

[ 10 marks ]

Period of running

Key Oxygen

demand Oxygen

consumption

0 5 10 15 20 25

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.0

Oxygen consuption (litre per minute)

Time (minutes)


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Question 14: 1. The diagram shows a terrestrial ecosystem.

Explain how energy flows through the food chain and how it is lost to the environment. [ 8 marks]

Question 15:

The figure above shows a type of transport which happens on the plasma membrane of a cell.

eagle

bird

rat

snake

earthworm


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Based on the diagram above, name the type of transport in the above figure.

Explain your answer.

[6 marks]

Question 16:

The figure shows the organelles involved in the production of extracellular enzymes.

(a) (i) Using a name example, explain the term extracellular enzyme. [2 marks]

(iii) Based on the organelles shown, explain how extracellular enzymes are produced.

[8 marks] (b) The figure shows a reaction of an enzyme and its substrate

Explain the mechanism of the enzymatic reaction [10 marks]


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Question 17:

Discuss the uses of enzymes in the household & industries. Why are enzyme used in these industry.

[20 marks]

Question 18

Diagram above shows the structure of HIV. The virus infects helper T cells of the human ‘s

immune system that caused AIDS, Acquired Immune Deficiency Syndrome.

i) Descibe the effects of the human immunodeficiency virus (HIV) on the body’s

defence mechanism.

( 6 marks )

ii) Suggest ways to prevent the spread of Acquired Immune Deficiency

Syndrome (AIDS). ( 4 marks )


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Question 19

Figure shows cells P and Q undergoing cell division. (a) Based on the cell division of P, explain the best technique can be used by an oil

palmer to produce a large number of oil palm in a short time. State one problem to be considered in using technique.

[10 marks]

(c) A farmer wants to produce large number of goat A in a short period time. He tries to apply the concept of cell division cell P to produce new individuals of goat A. Describe the technique used. Justify the technique.

[10 marks] (c) Explain how the daughter cell produced differs than parent cell.

[6 marks] Question 20: Diagram 18.1 shows parent cells undergoing cell division.

DIAGRAM 6.1 Cell division

M


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( a) Based on the Diagram 18.1 i) What is the process shown ? State the significant of the process. [ 4 marks ] b) The diagram shows a group of cells that is exposed to ultraviolet ray.

The exposure drives the cell cycle malfunctions. Based on the Diagram 6.2 describe the effect of cell cycle malfunctions to the body. [ 6 marks]

(d) Cancer is a disease which causes uncontrolled growth of tissues. Suggest the method to treat cancer. Explain how this treatment stops the growth of cancer cells.

[4 marks]


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Question 21: Figure 20.1 shows the structure of leaf. Figure 20.2 shows the organelle M involves in the formation of starch in plants.

Based on the raw materials (inorganic substances) required in photosynthesis,

explain the formation of starch(organic substance) in the plant.

[10 marks]

Question 22 Why this food can be kept longer compared its normal condition.

[8 marks ] TO BE CONTINUED……

Figure 19.1

Figure 8.2

- Cooked prawn - Frozen meat - Dried prunes

Module 2

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