A-LevelBiologyBiological molecules9700/12 · May/June 2021 · Q91 Mark

Chitin is a structural polysaccharide found in the hard, outer shells of animals such as crabs. Chitin is made of chains of amino sugars that contain NH groups. The diagram shows two sugars in the chain of a chitin molecule. [Figure 9.1]

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Aamylopectin

Bamylose

Ccellulose

Dglycogen

✓ Correct answer

C: cellulose

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2021 Paper 1 Variant 2, question 9.

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