A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2014 · Q81 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?

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 2014 Paper 1 Variant 2, question 8.

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