Which chemical composition is correct about DNA?

Match the uses of components of the First Aid kit in List A with their corresponding components in List B by writing the letter of the correct response beside the item number in the answer booklet provided. List A List B (i) Covering wounds to protect them from dirt and germs. A Soap Liniment Cotton wool (ii) Cleaning and drying wounds. D Sterile gauze (iii) Covering the hands to avoid infection of the wounds. E Petroleum jelly Razor blades (iv) Treating burns and scalds. G Sterile gloves (v) Securing bandages. H Safety pins (vi) Reducing muscle pain.

1. Covering wounds to protect them from dirt and germs. (1 mk)
2. Cleaning and drying wounds. (1 mk)
3. Covering the hands to avoid infection of the wounds. (1 mk)
4. Treating burns and scalds. (1 mk)
5. Securing bandages. (1 mk)
6. Reducing muscle pain. (1 mk)

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A woman visited a food seller and bought the following foods: eggs, Irish potatoes and sunflower seeds. (a) Identify the type of nutrient found in each of the food items listed. (b) Give four functions of the nutrient identified in the eggs.

1. Identify the type of nutrient found in each of the food items listed. (3 mk)
2. Give four functions of the nutrient identified in the eggs. (1 mk)

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Why are personal hygiene and good manners important in our daily life? Give six points.

1. Why are personal hygiene and good manners important in our daily life? Give six points. (6 mk)

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When doing experiment, accidentally Bahati touched hot water with her finger and she immediately withdrew it. (a) Explain the process of impulse flow from touching the hot water to the moment she responded. Give five points. (b) Draw the sensory neurone that picked up the nerve impulses from the receptor when she touched the hot water and label any four parts.

1. Explain the process of impulse flow from touching the hot water to the moment she responded. Give five points. (5 mk)
2. Draw the sensory neurone that picked up the nerve impulses from the receptor when she touched the hot water and label any four parts. (3 mk)

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How does irresponsible sexual behaviour differ from responsible sexual behaviour? Briefly explain four ways which can be used to eradicate irresponsible sexual behaviour.

1. How does irresponsible sexual behaviour differ from responsible sexual behaviour? (3 mk)
2. Briefly explain four ways which can be used to eradicate irresponsible sexual behaviour. (4 mk)

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(a) In three points, differentiate movement from locomotion. (b) Explain the importance of movement to the living organisms. Give two points.

1. In three points, differentiate movement from locomotion. (3 mk)
2. Explain the importance of movement to the living organisms. Give two points. (2 mk)

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When a red-flowered rose plant was crossed with a white flowered rose plant all members of the F1 generation were pink. Using genetic diagrams illustrate the cross made.

1. When a red-flowered rose plant was crossed with a white flowered rose plant all members of the F1 generation were pink. Using genetic diagrams illustrate the cross made. (5 mk)

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The blood circulation is important for survival of human being. In six points, justify this statement.

1. The blood circulation is important for survival of human being. In six points, justify this statement. (10 mk)

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Analyse five factors which affect the rate of respiration in living organisms.

1. Analyse five factors which affect the rate of respiration in living organisms. (10 mk)

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You are invited by the ward leader in the nearby village to talk about cholera. Explain six preventive measures of the disease that you would address to the villagers.

1. You are invited by the ward leader in the nearby village to talk about cholera. Explain six preventive measures of the disease that you would address to the villagers. (10 mk)

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