Form 2 Chapter 2

Form 2 Science Chapter 2

FORM 2 CHAPTER 2 NUTRITION

1. Diagram 1 shows part of the human digestive system.

X P: …………………………….

Q: ……………………………. R: …………………………….

Diagram 1

(a) Label structures P, Q and R using the following words. Pancreas

Liver

Oesophagus [3 marks]

(b) (i) Name the enzyme that is found in X. ………………………………………………………………………………............................. [1 mark] (ii) State the function of the enzyme in b(i). ……………………………………………………………………………………………………. [1 mark] (c) State the function of R. ……………………………………………………………………………………………………… [1 mark] (d) Name the process by which food is moved along P. ……………………………………………………………………………………………………… [1 mark]

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Form 2 Science Chapter 2

2. Diagram 2 shows some parts of the digestive system.

N

K

M L Diagram 2 (a) Name the following parts: K : ………………………………. ….. ……………………………………………………….. L : ………………………………..… ………………………………………………………….. M : ……………………………………………………………………………………………… N : ………………………………………………………………………………………………. [4 marks] (b) What is stored in the part labelled K? Where is it produced? ……………………………………………………………………………………………………. [2 marks] (c) Digestion of food ends in part L. State the end products of digestion for:

(i)

carbohydrates : ……………………………………………………………………… …..

(ii)

protein

: ………………………………………………………………………….

(iii)

fats

: …………………………………………………………………………. [3 marks]

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Form 2 Science Chapter 2

3. Diagram 3 shows the classes of food. Complete Diagram 3. Class of Food

Water

Vitamins

Fats

Diagram 3 (a) Name the classes of food in Diagram 3. [4 marks] (b) Draw lines to show the correct match between the class of food and its function. Function

Class of food Carbohydrate

To build new cells

Fibre To supply energy Protein To prevent constipation Mineral

[3 marks] JPN Pahang 2009

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Form 2 Science Chapter 2

4. Diagram 4.1 shows the average energy requirement for different groups of people.

A do Male adults le Female adults sc en t gir ls

20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0

kilo/joule

Adol esce nt boys

Ch ildr en

Babies

Average energy required per day Diagram 4.1 (a) Based on Diagram 4.1, state the average energy required per day for:

(i)

babies : …….…………………………………………………. ……………………… …….

(ii)

male adults : ………………………………………………………………………… …… [2 marks]

(b) Who requires the most energy? …………………….……………………………………………………………………………… [1 mark] (c) Table 4.2 shows the calorific value of certain food.

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Food

Quantity

Calorific (kJ)

Fried rice

1 plate

2675

Coffee

1 cup

294

Kuih koci

1 piece

344

Banana

1 fruit

378

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Form 2 Science Chapter 2

Table 4.2

Calculate the calorific value of the following meal by referring to Table 1. Fried rice

1 plate

Kuih koci

1 piece

Banana

2 fruits

Coffee

1 cup

[2 marks]

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Form 2 Science Chapter 2

5. An experiment has been carried out as shown in Diagram 5. Some distilled water from each boiling tube A and B is tested for starch and glucose respectively at the beginning and after 20 minutes.

Diagram 5 (a) What is the aim of the experiment? ………………………………………………………………………………………………………. [1 mark]

(b) Complete the table below based on the experiment.. Boiling tube

A ( Test for Starch )

B (Test for glucose)

Absent

Absent

Beginning of experiment After 20 minutes

[2 marks]

(c) What can be inferred from the results in 5 (b). ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… [2 marks] (d) State the variables in the experiment. (i) Manipulated variable:…………………………………………………………………………

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Form 2 Science Chapter 2

(ii) Responding variable: …………………………………………………………………………

(iii)

Control variable: ………………………………………………………………………… ….. [3 marks]

(e) Name the reagent used to test for the presence of (i) starch: ………………………………………………………………………………………… (ii) glucose: ……………………………………………………………………………………… (f)

Which part of the alimentary canal is represented by the: (i) visking tube: ………………………………………………………………………………….. (ii) distilled water: ………………………………………………………………………………… [2 marks]

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