CAIE A Level Biology 9700 · Genetic technology

Genetic technology: explain question

Explain4 marksStandard

Genetically modified (GM) cotton that expresses a Bt toxin gene is resistant to insect pests such as cotton bollworms. Explain how the use of this GM crop could help meet global food demand, and describe one ethical or social implication of its use.

How this question is marked

4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.

Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.

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