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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
Tuesday 16 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 in Section A. 5
• Answer one question from Section B. 6
• You must answer the questions in the spaces provided. Do not write
7
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 TOTAL
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 want
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
*jun267402301*
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2
Do not write
outside the
Section A 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 Complete Table 1 to show the properties of water and the importance of each
property to living organisms.
[2 marks]
Table 1
Importance of property to
Property of water
living organisms
Water has a high heat capacity.
Supports columns of water in xylem
and produces surface tension where
water meets air.
Water is a solvent.
Provides a cooling effect with little loss
of water by evaporation.
0 1 . 2 Describe what occurs in a condensation reaction.
Do not include any examples in your answer.
[1 mark]
*02*
IB/M/Jun26/7402/3
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3
Do not write
outside the
0 1 . 3 Draw the structure of one molecule of β-glucose. box
Describe how the structure of β-glucose is different from the structure of α-glucose.
[2 marks]
5
Turn over for the next question
Turn over ►
*03*
IB/M/Jun26/7402/3
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4
Do not write
outside the
0 2 During muscle contraction, calcium ions are released from the endoplasmic reticulum box
into the cytoplasm of muscle fibres.
Scientists measured the change in calcium ion concentration and force of muscle
contraction over the same time period in mice. They compared slow muscle fibres
with fast muscle fibres.
Figure 1 and Figure 2 show their results.
Figure 1 Figure 2
0 2 . 1 A student studying Figure 1 and Figure 2 correctly concluded that the solid lines
represent fast muscle fibres.
Justify the student’s conclusion.
[3 marks]
*04*
IB/M/Jun26/7402/3
Check Out ExamLab For More Resources : https://www.stuvia.com/user/examlab
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
Tuesday 16 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 in Section A. 5
• Answer one question from Section B. 6
• You must answer the questions in the spaces provided. Do not write
7
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 TOTAL
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 want
to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 78.
*jun267402301*
Check Out ExamLab For More Resources : IB/M/Jun26/G4005/V10 7402/3
https://www.stuvia.com/user/examlab
,Check Out ExamLab For More Resources : https://www.stuvia.com/user/examlab
2
Do not write
outside the
Section A 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 Complete Table 1 to show the properties of water and the importance of each
property to living organisms.
[2 marks]
Table 1
Importance of property to
Property of water
living organisms
Water has a high heat capacity.
Supports columns of water in xylem
and produces surface tension where
water meets air.
Water is a solvent.
Provides a cooling effect with little loss
of water by evaporation.
0 1 . 2 Describe what occurs in a condensation reaction.
Do not include any examples in your answer.
[1 mark]
*02*
IB/M/Jun26/7402/3
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,Check Out ExamLab For More Resources : https://www.stuvia.com/user/examlab
3
Do not write
outside the
0 1 . 3 Draw the structure of one molecule of β-glucose. box
Describe how the structure of β-glucose is different from the structure of α-glucose.
[2 marks]
5
Turn over for the next question
Turn over ►
*03*
IB/M/Jun26/7402/3
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, Check Out ExamLab For More Resources : https://www.stuvia.com/user/examlab
4
Do not write
outside the
0 2 During muscle contraction, calcium ions are released from the endoplasmic reticulum box
into the cytoplasm of muscle fibres.
Scientists measured the change in calcium ion concentration and force of muscle
contraction over the same time period in mice. They compared slow muscle fibres
with fast muscle fibres.
Figure 1 and Figure 2 show their results.
Figure 1 Figure 2
0 2 . 1 A student studying Figure 1 and Figure 2 correctly concluded that the solid lines
represent fast muscle fibres.
Justify the student’s conclusion.
[3 marks]
*04*
IB/M/Jun26/7402/3
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