Cambridge IGCSE · Biology (0610)

Chemical digestion: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Chemical digestion.

10 questions26 marksFree, no account

Question 1

1 mark

Where is hydrochloric acid produced in the human digestive system?

Question 2

1 mark

Which small, soluble molecules are produced by the chemical digestion of fats and oils by lipase?

Question 3

1 mark

Which of the following processes is an example of chemical digestion?

Question 4

1 mark

What is chemical digestion?

Question 5

1 mark

What is the primary product of the chemical digestion of starch by the enzyme amylase?

Question 6

2 marks

Define chemical digestion.

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Question 7

3 marks

Beyond maintaining the optimum pH for gastric enzymes, what is the biological significance of hydrochloric acid within the chemical digestion stage of the stomach?

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Question 8

6 marks

How does the specific location of the enzyme maltase on the epithelial membranes of the small intestine contribute to the efficiency of absorption?

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Question 9

4 marks

Describe the process of chemical digestion, including the role of enzymes. Give examples of where specific enzymes act in the human digestive system and the molecules they break down.

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Question 10

6 marks

A student uses Visking tubing (a partially permeable membrane) to model the alimentary canal. A mixture of starch and amylase is placed inside the tubing, which is then submerged in a beaker of distilled water.
(a) After 30 minutes, glucose is detected in the water outside the tubing, but starch is not. Explain this result in terms of chemical digestion.
(b) State the name and exact location of the enzyme that completes the breakdown of the products of amylase into glucose in the human body.

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