Mineral nutrition in plants — KCSE Biology

KCSE Biology · 84 practice questions · 3 syllabus objectives

26 easy32 medium26 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

State the role of macronutrients and micronutrients in plants

Describe deficiency symptoms of nitrogen and magnesium

Mineral nutrition in plants

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easySHORT ANSWER2 marks

List two deficiency symptoms of magnesium in plants. (2 marks)

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Part (a) — 2 marks

Interveinal chlorosis (yellowing between leaf veins) (1 mk)

Leaf curling or necrosis (death) of leaf tips (1 mk)

easySHORT ANSWER2 marks

List two deficiency symptoms of nitrogen in plants. (2 marks)

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Part (a) — 2 marks

Chlorosis (yellowing) of older leaves (1 mk)

Stunted growth due to reduced protein synthesis (1 mk)

easySHORT ANSWER3 marks

State the importance of magnesium in plants. (3 marks)

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Part (a) — 3 marks

Essential for the formation of chlorophyll, which is necessary for photosynthesis. (1 mk)

Acts as a cofactor for many enzymes involved in metabolic processes. (1 mk)

Helps maintain the structural integrity of cell membranes. (1 mk)

Define the role of potassium in plant nutrition. (2 marks)

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