CAIE IGCSE Biology 6.1.6 Nitrate & Magnesium Ions in Plants

Practise linking nitrate ions to amino-acid and protein production, and magnesium ions to chlorophyll, while identifying root hairs as the mineral-uptake surface.

Exam points

link nitrate ions to amino-acid synthesis, protein production and plant growth
link magnesium ions to chlorophyll production and therefore effective photosynthesis
identify root hairs as the site of magnesium-ion absorption and distinguish nitrate-deficiency stunting from magnesium-deficiency chlorosis

[Maximum number: 1]

Some algae are single-celled organisms that can photosynthesise. Their cells contain the pigment chlorophyll.

State the name of one mineral ion that is needed to make chlorophyll.

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6.1.6—Importance of: (a) nitrate ions question 1