This document provides information about the human digestive system and nutrition: 1) It includes diagrams of the digestive system labeling parts like the pancreas, liver, and esophagus. An enzyme found in the pancreas and its function are discussed. 2) Other parts of the digestive system are labeled like the stomach, small intestine, and large intestine. The stomach stores and breaks down food and the small intestine is where digestion ends. 3) Food groups like carbohydrates, proteins, fats, vitamins, minerals, and fiber are outlined along with their functions in the body. 4) A diagram shows the average daily energy needs vary between groups like babies, children, and adults. The

1. 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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2. 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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3. 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.
Class of food Function
Carbohydrate
To build new cells
Fibre
To supply energy
Protein
To prevent constipation
Mineral
[3 marks]
JPN Pahang 2009 68

4. Form 2 Science
Chapter 2
4. Diagram 4.1 shows the average energy requirement for different groups of people.
20000
18000
16000
14000 ls
12000
gir
kilo/joule boys t
10000 nt en
8000 esce sc
en
6000 ildr
Adol Female adults adults le
Male
4000
do
Babies Ch A
2000
0
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.
Food Quantity Calorific (kJ)
Fried rice 1 plate 2675
Coffee 1 cup 294
Kuih koci 1 piece 344
Banana 1 fruit 378
JPN Pahang 2009 69

5. 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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6. 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..
A B
Boiling tube
( Test for Starch ) (Test for glucose)
Beginning of experiment Absent Absent
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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7. 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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