A-LevelBiologyTransport in plantsFeb/Mar 2017Paper 1 Q321 Mark
What is the main function of a companion cell in phloem tissue?
Aproviding cytoplasmic contact with the sieve tube element for loading
Bproviding structural support for the sieve tube element
Cproviding the nucleus for cell division in the phloem
Dproviding the source of assimilates for storage
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of transport in plants within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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