A-LevelBiologyCell membranes and transportMay/June 2014Paper 1 Q141 Mark
The diagram shows the fluid mosaic model of a section of a cell surface membrane. [Figure 14.1] What is the role of each of the components labelled 1 to 3?
A1: antigen, 2: chemical receptor, 3: allow lipid soluble molecules to pass through
B1: barrier to polar molecules, 2: stabilise the membrane, 3: antigen
C1: chemical receptor, 2: allow lipid soluble molecules to pass through, 3: regulate the fluidity of the membrane
D1: stabilise the membrane, 2: control the fluidity of the membrane, 3: barrier to polar molecules
✓ Correct Answer
The correct answer is A. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep