Cambridge IGCSE Biology practice

Paper 4 structured question: Active transport

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Paper

Marks

Topic

Active transport

Exam-style question

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Paper 4Theory (Extended)1 marks

Plants need mineral ions for growth, which are absorbed by root hair cells.

Description

Root hair cells absorb ions from the soil using active transport, which requires energy.

a
Identify the source of energy used in active transport in root hair cells.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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Paper 4Theory (Extended)3 marks

Description

Root hair cells take in mineral ions from the soil even when the concentration of ions is higher inside the cell than outside.

a
Explain how root hair cells absorb mineral ions from the soil when the concentration is higher inside the cell than outside.
Your answer
Aim for approximately 3 distinct marking points.
[3]