O-LevelBiologyGenetics & Variation5090/11 · May/June 2012 · Q371 Mark

Bacteria can be genetically engineered to produce human insulin by adding a human insulin gene to the bacterial DNA. An advantage of this procedure is that

Athe bacteria do not need a source of glucose.

Bthe bacteria grow faster than before being engineered.

Cthe insulin does not need to be purified before being injected into a patient.

Dthe insulin is unlikely to cause an immune response when injected into a patient.

✓ Correct answer

D: the insulin is unlikely to cause an immune response when injected into a patient.

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Topic: Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2012 Paper 1 Variant 1, question 37.

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