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 2
Friday 12 June 2026 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
Question Mark
• a ruler with millimetre measurements
• a scientific calculator. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages.
7
• 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). 8
• Show all your working. 9
• Do all rough work in this book. Cross through any work you do not want
10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
*jun267402201*
IB/M/Jun26/G4005/V10 7402/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Figure 1 shows a three-neurone simple reflex.
Figure 1
0 1 . 1 Name the three types of neurone labelled A, B and C in Figure 1.
[1 mark]
A
B
C
0 1 . 2 Suggest two ways in which reflexes may increase the chance of survival of an
organism.
Do not refer to reflexes involved in homeostatic responses in your answer.
[2 marks]
1
2
*02*
IB/M/Jun26/7402/2
, 3
Do not write
outside the
0 1 . 3 Figure 2 shows the changes in potential difference across the axon membrane of a box
neurone during an action potential.
Figure 2
Use Figure 2 to determine the maximum frequency of impulses per second along this
neurone.
[1 mark]
Answer s–1
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun26/7402/2
, 4
Do not write
outside the
0 1 . 4 Describe the changes in the membrane and in the movement of ions during box
depolarisation and repolarisation.
In your answer, describe the process of positive feedback during depolarisation.
[5 marks]
9
*04*
IB/M/Jun26/7402/2
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 2
Friday 12 June 2026 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
Question Mark
• a ruler with millimetre measurements
• a scientific calculator. 1
2
Instructions
3
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. 4
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write 6
outside the box around each page or on blank pages.
7
• 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). 8
• Show all your working. 9
• Do all rough work in this book. Cross through any work you do not want
10
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
*jun267402201*
IB/M/Jun26/G4005/V10 7402/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Figure 1 shows a three-neurone simple reflex.
Figure 1
0 1 . 1 Name the three types of neurone labelled A, B and C in Figure 1.
[1 mark]
A
B
C
0 1 . 2 Suggest two ways in which reflexes may increase the chance of survival of an
organism.
Do not refer to reflexes involved in homeostatic responses in your answer.
[2 marks]
1
2
*02*
IB/M/Jun26/7402/2
, 3
Do not write
outside the
0 1 . 3 Figure 2 shows the changes in potential difference across the axon membrane of a box
neurone during an action potential.
Figure 2
Use Figure 2 to determine the maximum frequency of impulses per second along this
neurone.
[1 mark]
Answer s–1
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun26/7402/2
, 4
Do not write
outside the
0 1 . 4 Describe the changes in the membrane and in the movement of ions during box
depolarisation and repolarisation.
In your answer, describe the process of positive feedback during depolarisation.
[5 marks]
9
*04*
IB/M/Jun26/7402/2
