AQA A LEVEL BIOLOGY 7402/3 PAPER 3
QUESTION PAPER AND MARK SCHEME {
MERGED}
, Centre number
Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
Please write clearly in block capitals.
BIOLOGY
Paper 3
Wednesday 21 June 2023 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page. 5
• Answer all questions in Section A. 6
• Answer one question from Section B. 7
• You must answer the questions in the spaces provided. Do not TOTAL
write outside the box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not
wantto be marked.
Information
• The marks for the questions are shown in brackets.
,• The maximum mark for this paper is 78.
, 2
Do not write
Section A outside
the
box
Answer all questions in this section.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 . 1 Describe how stimulation of a Pacinian corpuscle produces a generator potential.
[3 marks]
Scientists investigated the stimulation of a Pacinian corpuscle in the skin of a fingertip.
The scientists applied two different pressures to the fingertip and recorded the changes
in membrane potential of the Pacinian corpuscle’s sensory neurone.
Figure 1 shows the scientists’ results.
Figure 1
QUESTION PAPER AND MARK SCHEME {
MERGED}
, Centre number
Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
Please write clearly in block capitals.
BIOLOGY
Paper 3
Wednesday 21 June 2023 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements Question Mark
• a scientific calculator. 1
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page. 5
• Answer all questions in Section A. 6
• Answer one question from Section B. 7
• You must answer the questions in the spaces provided. Do not TOTAL
write outside the box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not
wantto be marked.
Information
• The marks for the questions are shown in brackets.
,• The maximum mark for this paper is 78.
, 2
Do not write
Section A outside
the
box
Answer all questions in this section.
You are advised to spend no more than 1 hour and 15 minutes on this section.
0 1 . 1 Describe how stimulation of a Pacinian corpuscle produces a generator potential.
[3 marks]
Scientists investigated the stimulation of a Pacinian corpuscle in the skin of a fingertip.
The scientists applied two different pressures to the fingertip and recorded the changes
in membrane potential of the Pacinian corpuscle’s sensory neurone.
Figure 1 shows the scientists’ results.
Figure 1
