O-LevelBiologyHuman Nutrition5090/11 · May/June 2023 · Q51 Mark

A student tested a sample of food. The results are shown. colour after adding Benedict's solution and heating: red, colour after adding biuret reagent: purple, colour after adding iodine solution: yellow/brown. Which nutrients were in the food?

Aprotein, starch and reducing sugar

Bprotein and starch only

Cprotein and reducing sugar only

Dstarch and reducing sugar only

✓ Correct answer

C: protein and reducing sugar only

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Topic: Human Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2023 Paper 1 Variant 1, question 5.

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