74023 paper 3 - Study guides, Class notes & Summaries
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AQA A-level BIOLOGY 7402/3 Paper 3 June 2023
- Exam (elaborations) • 41 pages • 2024
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QA A-level BIOLOGY 7402/3 Paper 3 June 2023
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AQA A-level BIOLOGY 7402/3 Paper 3 June 2023 Mark Scheme
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QA A-level BIOLOGY 7402/3 Paper 3 June 2023 MS
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023
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AQA A-level BIOLOGY 7402/2 Paper 2 June 2023
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AQA A-level BIOLOGY 7402/2 Paper 2 June 2023
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AQA A-level BIOLOGY 7402/2 Paper 2 June 2023 Mark Scheme
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AQA A-level BIOLOGY 7402/2 Paper 2 June 2023 MS
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023 (VERIFIED)
- Exam (elaborations) • 28 pages • 2024
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023 (VERIFIED) (There are) stretch-mediated sodium ion 
channels (in the membrane); 
2. (Increased pressure) deforms/changes 
(sensory neurone/axon) membrane/lamella(e) 
OR 
(Increased pressure) deforms/changes sodium 
ion channels; 
3. Sodium ion channels open; 
4. Sodium ions diffuse in; 
5. Depolarisation (leading to generator potential); 
3 max 
(3 x 
AO1) 
1. 2. 3. or 4. Accept 
Na+ 
Max 2 if only 
reference to sodium 
and not sodium ions...
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AQA A level BIOLOGY 7402/3 Paper 3 June 2023 official QUESTION PAPER
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AQA A level BIOLOGY 7402/3 Paper 3 June 2023 official QUESTION PAPER
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023 | VERIFIED.
- Exam (elaborations) • 28 pages • 2024
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AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023 | VERIFIED. (There are) stretch-mediated sodium ion 
channels (in the membrane); 
2. (Increased pressure) deforms/changes 
(sensory neurone/axon) membrane/lamella(e) 
OR 
(Increased pressure) deforms/changes sodium 
ion channels; 
3. Sodium ion channels open; 
4. Sodium ions diffuse in; 
5. Depolarisation (leading to generator potential); 
3 max 
(3 x 
AO1) 
1. 2. 3. or 4. Accept 
Na+ 
Max 2 if only 
reference to sodium 
and not sodium ion...
-
2023 AQA A-level BIOLOGY 7402/3 Paper 3 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
- Exam (elaborations) • 71 pages • 2024
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2023 AQA A-level BIOLOGY 7402/3 Paper 3 
Question Paper & Mark scheme (Merged) June 
2023 [VERIFIED] 
Please write clearly in block capitals. 
Centre number 
Candidate number 
Surname 
Forename(s) 
Candidate signature 
I declare this is my own work. 
A-level 
BIOLOGY 
Paper 3 
Wednesday 21 June 2023 Morning Time allowed: 2 hours 
Materials 
For this paper you must have: 
• a ruler with millimetre measurements 
• a scientific calculator. 
Instructions 
• Use black ink or black ball-point ...
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