A-LevelBiologyTransport in plants9700/12 · Feb/Mar 2024 · Q281 Mark

Which statement correctly describes the association between a companion cell and its sieve tube cell?

AThe companion cell provides all of the ATP used for energy-requiring processes in both types of cell.

BThe companion cell controls the active transport of molecules through the sieve plates.

CThe companion cell prevents side-to-side movement of assimilates between sieve tube cells.

DThe companion cell provides a nucleus that controls cellular activities in both types of cell.

✓ Correct answer

D: The companion cell provides a nucleus that controls cellular activities in both types of cell.

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2024 Paper 1 Variant 2, question 28.

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