Cambridge IGCSE · Biology (0610)

Biotechnology: Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Biotechnology.

8 questions16 marksFree, no account

Question 1

1 mark

Which biological molecule is used in the production of fruit juice to make it clearer by breaking down plant cell walls?

Question 2

1 mark

In the industrial production of fruit juice, why is the enzyme pectinase added to the crushed fruit?

Question 3

1 mark

Which set of conditions is required for yeast to produce the maximum yield of ethanol for use as a biofuel?

Question 4

1 mark

In the process of bread-making, what is the role of yeast?

Question 5

1 mark

Why are biological washing powders containing enzymes more effective than non-biological powders at removing certain stains at low temperatures?

Question 6

2 marks

In large-scale biotechnology, explain why the temperature inside an industrial fermenter must be carefully controlled using a water jacket.

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Question 7

4 marks

In an industrial fermenter used for the production of penicillin, explain why the nutrient supply and oxygen concentration must be constantly monitored and adjusted.

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Question 8

5 marks

(a) Yeast is a microorganism used in bread-making. Describe how yeast causes the bread dough to rise during the production process.
(b) State the name of the chemical process used by yeast to release energy from glucose in the absence of oxygen.
(c) The enzyme pectinase is used in the commercial production of fruit juices. Explain the benefit of adding pectinase to the fruit pulp.

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