O-LevelBiologyPlant Nutrition5090/11 · Oct/Nov 2021 · Q71 Mark

Why do newly germinated seeds fail to grow into healthy plants if they lack magnesium ions?

AMagnesium ions are a necessary component of all proteins.

BMagnesium ions are needed to convert chlorophyll to starch.

CMagnesium ions are needed to form cell walls.

DMagnesium ions are needed to form chlorophyll molecules.

✓ Correct answer

D: Magnesium ions are needed to form chlorophyll molecules.

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Topic: Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2021 Paper 1 Variant 1, question 7.

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