O-LevelBiologyRespiration5090/11 · Oct/Nov 2024 · Q151 Mark

Scientists have concluded that absorption of mineral ions in plants requires energy from respiration. Which observation best supports this conclusion?

ACarbohydrate is stored in the roots.

BLiving roots give off carbon dioxide.

CThe root hairs have a large surface area.

DUptake of mineral ions is reduced in lower oxygen concentrations.

✓ Correct answer

D: Uptake of mineral ions is reduced in lower oxygen concentrations.

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2024 Paper 1 Variant 1, question 15.

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