O-LevelBiologyPlant Nutrition5090/11 · Oct/Nov 2014 · Q71 Mark

A plant is kept in the dark for two days. One of its leaves is used in an experiment to investigate photosynthesis as shown in the diagram. What are the colours of Q and R, when the leaf is tested for starch using iodine solution?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AQ: blue/black, R: brown

BQ: brown, R: brown

CQ: blue/black, R: blue/black

DQ: brown, R: blue/black

✓ Correct answer

B: Q: brown, R: brown

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Topic: Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2014 Paper 1 Variant 1, question 7.

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