TOPIC 2 : NUTRITION AND FOOD PRODUCTION

1. Which of the following foods has the highest calorific values?A RiceB MeatC BreadD Egg

2. Which of the following people need more calories?A A healthy peopleB A womanC An ageing peopleD A bigger size of body people

Figure 1

3. The diagram above shows one of the health problem. What is the causes?A Iodine deficient dietB Eating disordersC Lacking of vitamin CD Inadequate protein intake

4. Which of the following causes is true about obesity?A Faulty diet and do not do physical workB Result from stress and strainC A habit of consuming high calorie foodsD Result from less consumption of food

5. If a plant lack of phosphorus, it A growth stuntedB root growth disorderC has purplish dots on the tip of leavesD has weak stem of plant

6. Protein are organic compounds made up of A carbon, hydrogen and oxygen B carbon, hydrogen, oxygen and nitrogen C carbon, oxygen and nitrogen D hydrogen, oxygen and nitrogen

7. Macronutrients are elements that are required by plants A in large quantities B in small quantities C only during germination D only during fruit formation

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8. Which one of the following food is produced by plants during photosynthesis ?A Fats B Vitamins C Glucose D Protein

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Figure 2The diagram above shows photosynthesis process. Which of the following is true for the word equation?A

Oxygen + Water Glucose + Carbon dioxide

BCarbon dioxide + Water Glucose + Oxygen

C Carbon dioxide + Sunlight + Water + Chlorophyll Glucose + Oxygen

D Glucose + Oxygen Carbon dioxide + Sunlight + Water + Chlorophyll

10. Excessive intake of sugar and salt may cause A gastrisis and gallstones B hypertension and diabetes C obesity and coronary thrombosis D gastrointestinal upset and kidney damage

11.

Figure 3 Mutton meat contains saturated fat and can harm our health because they A cause high cholesterol levels B cause arthritis C cause hormonal imbalance in the body D cause diabetes

12. Nitrogen from the atmosphere can be converted into nitrates by I lightning II saprophytic bacteria III nitrogen fixing bacteria

A I and II B I and III C II and III D I, II and III

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sunlight

chlorophyllsunlight

chlorophyll

13.

Figure 4

The diagram shows the nitrogen cycle. In which part does the denitrifying bacteria play a role ?

14 . Which of the following does not affect the calorific requirement of a person ? A Sex B Age C Race D Climate

15.

Figure 5 The picture shows atherosclerosis of blood artery. The class of food that cause this is A fat B protein C mineral salt D carbohydrate

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Figure 6 An experiment is carried out as shown by the apparatus above. What is the aim of the

above experiment ? A To study the effect of sunlight on growth of plants B To study the effect of water on growth of plants C To study the effect of excess of nutrients on growth of plants D To study the effect of lack of nutrients on growth of plants

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Figure 7

The picture above shows the result of severe reduction of food intake. The result iof this eating disorder is called

A goiter B scurvy C arteriosclerosis D anorexia nervosa

18.

These symptoms may be caused by the lack of A carbohydrate B vitamin C protein D iodine

19. What is the function of chlorophyll ? A Absorbs light energy to break carbon dioxide into carbon and oxygen B Absorbs light energy to break water molecules into oxygen gas and hydrogen ions C Absorbs light energy to break water molecules and carbon dioxide to form starch D Absorbs light energy to combine water molecules and oxygen to form starch and carbon dioxide

20 What is the function of nitrogen in plants ? A To synthesise chlorophyll B To synthesise starch C To activate enzymes D To synthesise protein

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Stunted growth Swollen abdomen Usually happens to

children less than five years of age

STRUCTURED QUESTIONS

1.

Figure 1

The diagram above shows a green plant during the day lighta. Name the process taking place during this time.

b. Write the woed equaiton for the process in (a) above.____________________________________________________________________

c. Name gas P and Q P : ________________________________________________________________

Q : ________________________________________________________________

d. i. Name the pigment in leaves that is involved in this process. _____________________________________________________________________

ii. State the function of this pigment.______________________________________________________________________

e. State the function of plant in the food chain.______________________________________________________________________

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2.

Figure 2

A B C D EDistilled water Complete

NitrogenWithout

PhosphorusWithout

PotassiumWithout

The apparatus set up above is used to study the effect lack of macronutrients on plant growth.

a. Why distilled water used in test tube A and not tap water ?__________________________________________________________________

b. Explain why all the test tubes are covered with black paper ? __________________________________________________________________

c. State the i. manipulated variable : _____________________________________________

ii. constant variable : _____________________________________________

d. What will be the effect of lack of : i. nitrogen : _______________________________________________________

ii. phosphorus : _____________________________________________________

iii. potassium on the plant : _____________________________________________

3.

a. i. What is the role of the algae in this food chain?_________________________________________________________________

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Algae

tadpoles

Small fish Man

Big fish

ii. What charcteristic does the algae have to assume this role stated in a (i)__________________________________________________________________

b. Name two consumers in this food chain__________________________________________________________________

c. If all the primary consumers were to die, what effect would that have on the i. producer : ______________________________________________________

ii. secondary consumer : _____________________________________________

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ANSWERS

OBJECTIVE

1 B 5 C 9 B 13 A 17 D2 D 6 B 10 B 14 C 18 C3 A 7 A 11 A 15 A 19 B4 C 8 C 12 B 16 D 20 D

STRUCTURED QUESTIONS

1. a. Photosynthesis process sunlightb. Carbon dioxide + water glucose + oxygen Chlorophyll

c. P : Carbon dioxide, Q : Oxygend. i. Chlorophyll

ii. Absorbs light energy to break water molecules into oxygen gas and hydrogen ions e. As food producer

2. a. Pipe water contains mineral salts while distilled water does not.

b. To prevent sunlight from entering the test tube which the causes the growth of algae. The algae will used up the mineralsin the solution

c. i. Solutions lacking with certain macro nutrientsii. Sunlight

d. i. The leaves of plants turn yellowishii. The growth of the roots is pooriii. The leaves turn yellow and have brown spots

3. a. Producer b. The green plants utilize inorganic material like carbon dioxide, water and turn them to food for their own use.

c. tadpoles and small fishd. i. producer size inreases

ii. secondary consumer decreases

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