A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2017 · Q91 Mark

Two disaccharides are maltose and sucrose. Maltose is formed from two molecules of glucose, whilst sucrose is formed from fructose and glucose. Which row shows the molecular formulae of the two disaccharides? [Figure 9.1 - table of molecular formulae for maltose and sucrose]

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Amaltose: C12H22O11, sucrose: C12H22O11

Bmaltose: C12H22O11, sucrose: C12H24O12

Cmaltose: C12H24O12, sucrose: C12H22O11

Dmaltose: C12H24O12, sucrose: C12H24O12

✓ Correct answer

A: maltose: C12H22O11, sucrose: C12H22O11

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2017 Paper 1 Variant 2, question 9.

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