A-LevelBiologyCell membranes and transportOct/Nov 2020Paper 1 Q161 Mark
Four agar blocks are stained green using universal indicator and suspended in 1 moldm⁻³ hydrochloric acid. [Figure 16.1] The time taken for the agar blocks to change from green to red was recorded. Which agar block would be the first to become completely red?
A2 cm x 2 cm x 2 cm
B2 cm x 1 cm x 4 cm
C2 cm x 3 cm x 2 cm
D5 cm x 2 cm x 3 cm
✓ 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...
📋 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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