A-LevelBiologyTransport in plants9700/12 · Feb/Mar 2025 · Q261 Mark

Which row correctly describes the role of growing leaves as sources or sinks for amino acids and sucrose?

Aamino acids: leaves act as sinks only, sucrose: leaves can act as sources or sinks

Bamino acids: leaves act as sinks only, sucrose: leaves act as sources only

Camino acids: leaves can act as sources or sinks, sucrose: leaves act as sources only

Damino acids: leaves can act as sources or sinks, sucrose: leaves can act as sources or sinks

✓ Correct answer

D: amino acids: leaves can act as sources or sinks, sucrose: leaves can act as sources or sinks

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2025 Paper 1 Variant 2, question 26.

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