A-LevelBiologyTransport in plantsFeb/Mar 2021Paper 1 Q281 Mark
Which statement about the role of co-transporter proteins in the movement of sucrose is correct?
ACo-transporter proteins pump hydrogen ions into phloem sieve tubes along with sucrose.
BHydrogen ions diffuse through co-transporter proteins with sucrose into companion cells.
CPlasmodesmata move sucrose into phloem sieve tubes via co-transporter proteins.
DSucrose is moved through co-transporter proteins by active transport.
✓ Correct Answer
The correct answer is B. 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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