A-LevelBiologyCell membranes and transportFeb/Mar 2018Paper 1 Q191 Mark
Companion cells use ATP to move hydrogen ions out of the cell and co-transporter proteins to allow hydrogen ions to return with sucrose molecules. Which two processes are involved in this movement?
Aactive transport and diffusion
Bactive transport and facilitated diffusion
Cexocytosis and diffusion
Dexocytosis and facilitated diffusion
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of cell membranes and transport within the Biologysyllabus. The examiner's mark scheme requires...
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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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