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 1
Thursday 4 June 2026 Afternoon 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.
*jun267402101*
7402/1
for more:
IB/M/Jun26/G4005/V13
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Figure 1 shows a molecule of antidiuretic hormone (ADH).
Figure 1
The ADH molecule is made up of nine amino acids joined by peptide bonds.
0 1 . 1 Use information in Figure 1 to describe two other structural features of ADH.
[2 marks]
1
2
*02* for more:
IB/M/Jun26/7402/1
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 1
Thursday 4 June 2026 Afternoon 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.
*jun267402101*
7402/1
for more:
IB/M/Jun26/G4005/V13
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Figure 1 shows a molecule of antidiuretic hormone (ADH).
Figure 1
The ADH molecule is made up of nine amino acids joined by peptide bonds.
0 1 . 1 Use information in Figure 1 to describe two other structural features of ADH.
[2 marks]
1
2
*02* for more:
IB/M/Jun26/7402/1
