CAIE IGCSE Biology 21.1.1 Bacteria Are Useful in Biotechnology Questions

Practise explaining how rapid reproduction and the ability to make complex molecules make bacteria useful in biotechnology.

Exam points

state that bacteria reproduce rapidly and can quickly produce a large culture
state that bacteria can make complex molecules such as useful proteins
reject false claims that antibiotic immunity or absence of plasmids makes bacteria useful

[Maximum number: 2]

Fig. 5.1 shows some of the stages in the reproduction of the bacterium Escherichia coli.

Fig. 5.1

Bacteria are useful in genetic engineering because they contain plasmids.

List two reasons, other than the presence of plasmids, that make bacteria and single-celled fungi useful to biotechnology industries.

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