F2 Sc MCh2

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FORM 2 CHAPTER 2

NUTRITION

1. Diagram 1 shows part of the human digestive system.Rajah 1 menunjukkan bahagian dalam sistem percernaan manusia

(a) Label structures P, Q and R Labelkan stuktur P, Q, dan R

[3 marks](b) (i) Name the enzyme that is found in X.

Namakan enzim yang terdapat dalam X.............................[1 mark] (ii) State the function of the enzyme in b(i).

Nyatakan fungsi enzim di b(i).[1 mark]

(c) State the function of R.

Nyatakan fungsi R[1 mark]

(d)Name the process by which food is moved along P.

Namakan proses pergerakan makanan sepanjang P

[1 mark]

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

Rajah 2 menunjukkan sebahagian sistem percernaan makanan

(a) Name the following parts:

Namakan bahagia tersebut

K : . .. ..

L : .... M :

N : .[4 marks](b) What is stored in the part labelled K? Where is it produced?Apakah yang disimpan dalam bahagian yang berlabel K? Di manakah ia dihasilkan

.

[2 marks](c) Digestion of food ends in part L. State the end products of digestion for:

Percernaan makanan berakhir di bahagian L. Nyatakan hasil percernaan

(i) carbohydrates : ..

(ii) protein : . (iii) fats : . [3 marks]3. Diagram 3 shows the classes of food. Complete 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.

[3 marks]

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

(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.

FoodQuantityCalorific (kJ)

Fried rice1 plate2675

Coffee1 cup294

Kuih koci1 piece344

Banana1 fruit378

Table 4.2 Calculate the calorific value of the following meal by referring to Table 1.

Fried rice

Kuih koci

Banana

Coffee1 plate

1 piece

2 fruits

1 cup

[2 marks]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.

(a) What is the aim of the experiment?.[1 mark](b) Complete the table below based on the experiment..

Boiling tubeA

( Test for Starch )B

(Test for glucose)

Beginning of experimentAbsentAbsent

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:

(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]Diagram 1

R: .

Class of food

P: .

X

Female adults

Male adults

Adolescent girls

Adolescent boys

10000

8000

6000

4000

2000

0

Children

To prevent constipation

Protein

Mineral

To supply energy

Fibre

To build new cells

Carbohydrate

Vitamins

Fats

Water

Class of Food

Diagram 3

Babies

Function

Q: .

Diagram 2

K

L

M

N

12000

14000

16000

18000

20000

Diagram 4.1

Average energy required per day

kilo/joule

Diagram 5

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