000001
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
st
BIOLOGY be
Paper 2
Thursday 23 May 2024 Morning Time allowed: 1 hour 30 minutes
Materials
he
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements
Question Mark
• a scientific calculator.
1
lt
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page.
4
• Answer all questions.
al
• You must answer the questions in the spaces provided. Do not write 5
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of
7
this book. Write the question number against your answer(s).
• Show all your working. 8
• Do all rough work in this book. Cross through any work you do not want 9
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
*JUN247401201*
IB/M/Jun24/G4001/E7 7401/2
Page 1 of 28
,000002
2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Water has a high heat capacity and a large latent heat of vaporisation.
Describe the importance of each of these properties to living organisms.
[2 marks]
High heat capacity
Large latent heat of vaporisation
st
0 1 . 2 Figure 1 shows that water loss from a porous pot can cause the upward movement of
water. be Figure 1
he
lt
al
*02*
IB/M/Jun24/7401/2
Page 2 of 28
, 000003
3
Do not write
outside the
Biologists have concluded that the experiment in Figure 1 supports the box
cohesion–tension theory of water transport in the xylem.
Explain how this conclusion is supported by the experiment in Figure 1.
[3 marks]
st
be
0 1 . 3 An air bubble was introduced into the glass tubing in Figure 1. The air bubble moved
a distance (d) of 1.5 cm in 120 minutes. The radius of the lumen (hole) of the glass
tubing was 0.6 cm
he
Use this information and the formula πr 2 d to calculate the rate of water movement in
the glass tubing in cm3 hour –1.
Use π = 3.14 in your calculation.
[1 mark]
lt
al
Answer cm3 hour –1 6
Turn over ►
*03*
IB/M/Jun24/7401/2
Page 3 of 28
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
st
BIOLOGY be
Paper 2
Thursday 23 May 2024 Morning Time allowed: 1 hour 30 minutes
Materials
he
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements
Question Mark
• a scientific calculator.
1
lt
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page.
4
• Answer all questions.
al
• You must answer the questions in the spaces provided. Do not write 5
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of
7
this book. Write the question number against your answer(s).
• Show all your working. 8
• Do all rough work in this book. Cross through any work you do not want 9
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
*JUN247401201*
IB/M/Jun24/G4001/E7 7401/2
Page 1 of 28
,000002
2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Water has a high heat capacity and a large latent heat of vaporisation.
Describe the importance of each of these properties to living organisms.
[2 marks]
High heat capacity
Large latent heat of vaporisation
st
0 1 . 2 Figure 1 shows that water loss from a porous pot can cause the upward movement of
water. be Figure 1
he
lt
al
*02*
IB/M/Jun24/7401/2
Page 2 of 28
, 000003
3
Do not write
outside the
Biologists have concluded that the experiment in Figure 1 supports the box
cohesion–tension theory of water transport in the xylem.
Explain how this conclusion is supported by the experiment in Figure 1.
[3 marks]
st
be
0 1 . 3 An air bubble was introduced into the glass tubing in Figure 1. The air bubble moved
a distance (d) of 1.5 cm in 120 minutes. The radius of the lumen (hole) of the glass
tubing was 0.6 cm
he
Use this information and the formula πr 2 d to calculate the rate of water movement in
the glass tubing in cm3 hour –1.
Use π = 3.14 in your calculation.
[1 mark]
lt
al
Answer cm3 hour –1 6
Turn over ►
*03*
IB/M/Jun24/7401/2
Page 3 of 28
