A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2019 · Q71 Mark

A student carried out four tests for biological molecules on a solution. The results are shown in the table. test for biological molecules: iodine | observation: orange-brown test for biological molecules: biuret | observation: purple test for biological molecules: Benedict's | observation: orange test for biological molecules: emulsion | observation: clear Which three molecules may be present in this solution?

Aglucose, starch, globin

Bglobin, glucose, collagen

Cstarch, sucrose, collagen

Dsucrose, globin, collagen

✓ Correct answer

B: globin, glucose, collagen

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2019 Paper 1 Variant 2, question 7.

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