A-LevelBiologyTransport in plantsOct/Nov 2010Paper 1 Q241 Mark

What is the main function of a companion cell in mature phloem tissue?

Q: What topic does this question test?

This question tests Transport in plants in A-Level Biology (syllabus code 9700). It is worth 1 mark.

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: providing cytoplasmic contact with the sieve tube element for loading

📋 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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This multiple-choice question tests Transport in plants in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology Oct/Nov 2010 examination, Paper 1 Variant 2.

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