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Biology
Secondary 4-6 (Ages 15-18)
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1
Which of the following is the primary site of chemical digestion and absorption of nutrients?
A
Stomach
B
Small intestine
C
Oesophagus
D
Large intestine
2
What is the role of bile in the digestion of fats?
A
It emulsifies fats to increase surface area for lipase action
B
It transports fatty acids across the intestinal wall
C
It neutralises stomach acid to provide an alkaline medium
D
It hydrolyses triglycerides into fatty acids and glycerol
3
Which enzyme is responsible for the breakdown of starch into maltose?
A
Amylase
B
Lipase
C
Maltase
D
Protease
4
Where does the digestion of proteins begin?
A
Duodenum
B
Mouth
C
Stomach
D
Ileum
5
What is the function of hydrochloric acid in the stomach?
A
It emulsifies fats
B
It digests proteins directly
C
It neutralises bile
D
It activates pepsinogen to pepsin and kills bacteria
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