A-LevelBiologyCell membranes and transportMay/June 2022Paper 1 Q141 Mark
When animal cells are cultured, salt solution is added to keep the cells alive. What is the purpose of the salt solution?
Ato allow facilitated diffusion of salts into the cells
Bto prevent diffusion of other ions in or out of the cells
Cto prevent net movement of water into or out of the cells
Dto provide a source of energy for active transport
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of cell membranes and transport 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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