Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Biology Paper
1H
Tuesday 13 May 2025 Afternoon Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
a ruler Question Mark
a scientific calculator. 1
2
Instructions 3
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 4
Fill in the boxes at the top of this page. 5
Answer all questions in the spaces provided. 6
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 TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4006/E9
,8464/B/1H
, 2
DoDo
notnot
write
writethe
0 1 The heart is an organ that pumps blood around the body. outside
outside
box the
Figure 1 is a model of the heart and shows the direction of
blood flow.
Figure 1
0 1 .1 Draw one line from each blood vessel shown in Figure 1 to the
name of the blood vessel.
[2 marks]
IB/M/Jun25/8464/B/
1H
, 3
Do not write
0 1 . outside the
Heart rate is controlled by a group of box
2 cells. The group of cells acts as a
pacemaker.
[1 mark]
Where would the pacemaker be located in
Figure 1? Tick () one box.
C D E F
0 1 .3 Heart muscle cells contain many mitochondria.
Explain why heart muscle cells contain many
mitochondria. [3 marks]
Question 1 continues on the next page
IB/M/Jun25/8464/B/
1H
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Biology Paper
1H
Tuesday 13 May 2025 Afternoon Time allowed: 1 hour 15 minutes
Materials For Examiner’s Use
For this paper you must have:
a ruler Question Mark
a scientific calculator. 1
2
Instructions 3
Use black ink or black ball-point pen.
Pencil should only be used for drawing. 4
Fill in the boxes at the top of this page. 5
Answer all questions in the spaces provided. 6
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 TOTAL
answer(s).
Do all rough work in this book. Cross through any work you do not
want to be marked.
In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 70.
The marks for questions are shown in brackets.
You are expected to use a calculator where appropriate.
You are reminded of the need for good English and clear presentation in your answers.
IB/M/Jun25/G4006/E9
,8464/B/1H
, 2
DoDo
notnot
write
writethe
0 1 The heart is an organ that pumps blood around the body. outside
outside
box the
Figure 1 is a model of the heart and shows the direction of
blood flow.
Figure 1
0 1 .1 Draw one line from each blood vessel shown in Figure 1 to the
name of the blood vessel.
[2 marks]
IB/M/Jun25/8464/B/
1H
, 3
Do not write
0 1 . outside the
Heart rate is controlled by a group of box
2 cells. The group of cells acts as a
pacemaker.
[1 mark]
Where would the pacemaker be located in
Figure 1? Tick () one box.
C D E F
0 1 .3 Heart muscle cells contain many mitochondria.
Explain why heart muscle cells contain many
mitochondria. [3 marks]
Question 1 continues on the next page
IB/M/Jun25/8464/B/
1H
