Please write clearly in block capitals.
Centre number
Surname
Forename(s)
For Examiner’s Use
Question Mark
Candidate signature
I declare this is my own work. 1
A- Candida
2
level
te 3
number
4
BIOLOGY ACTUAL 2025 PAPER 5
MERGED WITH MARK SCHEME 6
Paper 1 7
8
9
10
TOTAL
Thursday 5 June 2025 Afternoon 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 pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
, 2
Do not
write
outside the
box
• You must answer the questions in the spaces provided. Do not 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 want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
*
jun257402101* tyrionpapers.com 7402/1
IB/M/Jun25/G4007/V8
Answer all questions in the spaces provided.
0 1
tyrionpapers.com
IB/M/Jun25/7402/1
, 3
Do not
write
outside the
box
0 1
.1 The digestion and absorption of lipids involves:
• emulsification by bile salts
• micelles.
Explain each of the following.
[4 marks]
The role of micelles in the absorption of lipids
Turn over ►
tyrionpapers.com
IB/M/Jun25/7402/1
, 4
Do not
write
outside the
box
The importance of emulsification in the digestion of lipids
.2 Describe and explain the arrangement of phospholipid molecules in the cell-surface
membrane.
[2 marks]
*02*
6
tyrionpapers.com
IB/M/Jun25/7402/1
Centre number
Surname
Forename(s)
For Examiner’s Use
Question Mark
Candidate signature
I declare this is my own work. 1
A- Candida
2
level
te 3
number
4
BIOLOGY ACTUAL 2025 PAPER 5
MERGED WITH MARK SCHEME 6
Paper 1 7
8
9
10
TOTAL
Thursday 5 June 2025 Afternoon 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 pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
, 2
Do not
write
outside the
box
• You must answer the questions in the spaces provided. Do not 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 want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
*
jun257402101* tyrionpapers.com 7402/1
IB/M/Jun25/G4007/V8
Answer all questions in the spaces provided.
0 1
tyrionpapers.com
IB/M/Jun25/7402/1
, 3
Do not
write
outside the
box
0 1
.1 The digestion and absorption of lipids involves:
• emulsification by bile salts
• micelles.
Explain each of the following.
[4 marks]
The role of micelles in the absorption of lipids
Turn over ►
tyrionpapers.com
IB/M/Jun25/7402/1
, 4
Do not
write
outside the
box
The importance of emulsification in the digestion of lipids
.2 Describe and explain the arrangement of phospholipid molecules in the cell-surface
membrane.
[2 marks]
*02*
6
tyrionpapers.com
IB/M/Jun25/7402/1
