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
Wednesday 19 June 2024 Morning Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator.
1
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 in Section A.
5
• Answer one question from Section B.
• 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). TOTAL
• 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.
*jun247402301*
IB/M/Jun24/G4006/E11 7402/3
, 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 In the following passage, each numbered space can be filled with a biological term.
Each type of cell has specific molecules on its (1) that identify it. An
antibody is a (2) with two (3) binding sites. Antibodies
are made and released by (4) cells.
Vaccines can provide protection for individuals and populations against disease. The
response to a vaccine is an example of (5) immunity.
(6) immunity occurs when a large proportion of a population becomes
immune to a disease.
Write the correct biological term beside each number below that matches the space in
the passage.
[3 marks]
1
2
3
4
5
6
0 1 . 2 There is currently no effective vaccine available for HIV.
Suggest one reason why.
[1 mark]
*02*
IB/M/Jun24/7402/3
, 3
Do not write
outside the
0 1 . 3 box
Table 1 shows the action of two antibiotics.
Table 1
Antibiotic Action of antibiotic
Ciprofloxacin Causes double-stranded DNA to break apart
Penicillin Prevents formation of crosslinks between murein chains
Using the information in Table 1, explain why each antibiotic is not effective against
HIV.
[2 marks]
Ciprofloxacin
Penicillin
6
Turn over for the next question
Turn over ►
*03*
IB/M/Jun24/7402/3
, 4
Do not write
outside the
0 2 box
A student investigated the effect of temperature on the rate of aerobic respiration in
woodlice.
Figure 1 shows the apparatus they used.
Figure 1
The student altered the temperature of the water bath and measured how far the drop
of coloured liquid moved every minute for 5 minutes.
0 2 . 1 Other than those stated, suggest two variables the student should have kept constant
in this investigation.
[1 mark]
1
2
*04*
IB/M/Jun24/7402/3
, 5
Do not write
outside the
0 2 . 2 box
Describe how the student used the apparatus in Figure 1 to reset the drop of coloured
liquid back to the right-hand end of the tubing.
[2 marks]
0 2 . 3 The student also set up a control experiment.
Suggest a suitable control experiment and explain why it was necessary.
[2 marks]
Control experiment
Explanation
Question 2 continues on the next page
Turn over ►
*05*
IB/M/Jun24/7402/3
, 6
Do not write
outside the
0 2 . 4 box
Figure 2 shows the student’s results at 25 °C
The mass of the woodlice in the tube was 3.78 g
Figure 2
Use Figure 1 (on page 4) and Figure 2 to calculate the mean rate of oxygen uptake
by the woodlice in mm3 s–1 g–1
The formula for the volume of the capillary tubing is π r2 l.
Use π = 3.14 in your calculation.
Show your working and give your answer to 2 decimal places.
[3 marks]
Answer mm3 s–1 g–1 8
*06*
IB/M/Jun24/7402/3
, 7
Do not write
outside the
0 3 . 1 box
Describe and explain the relationship between surface area to volume ratio of the
human body and metabolic rate.
[3 marks]
Question 3 continues on the next page
Turn over ►
*07*
IB/M/Jun24/7402/3
, 8
Do not write
outside the
Table 2 shows the height and mass of two adults. box
Table 2
Person Height / cm Mass / kg
A 181 90.90
B 149 62.62
The surface area of a person is estimated using the following formula:
height in cm × mass in kg
Surface area in m2 = � 3600
The volume of a person is estimated using the following formula:
mass in kg
Volume in m3 = 1010
0 3 . 2 Using suitable calculations, deduce which person has the smaller surface area to
volume ratio.
Show your working and complete the sentence below.
Give your answer to 3 significant figures.
[3 marks]
Person has the smaller surface area to volume ratio which =
*08*
IB/M/Jun24/7402/3
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 3
Wednesday 19 June 2024 Morning Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a ruler with millimetre measurements Question Mark
• a scientific calculator.
1
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 in Section A.
5
• Answer one question from Section B.
• 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). TOTAL
• 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.
*jun247402301*
IB/M/Jun24/G4006/E11 7402/3
, 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 In the following passage, each numbered space can be filled with a biological term.
Each type of cell has specific molecules on its (1) that identify it. An
antibody is a (2) with two (3) binding sites. Antibodies
are made and released by (4) cells.
Vaccines can provide protection for individuals and populations against disease. The
response to a vaccine is an example of (5) immunity.
(6) immunity occurs when a large proportion of a population becomes
immune to a disease.
Write the correct biological term beside each number below that matches the space in
the passage.
[3 marks]
1
2
3
4
5
6
0 1 . 2 There is currently no effective vaccine available for HIV.
Suggest one reason why.
[1 mark]
*02*
IB/M/Jun24/7402/3
, 3
Do not write
outside the
0 1 . 3 box
Table 1 shows the action of two antibiotics.
Table 1
Antibiotic Action of antibiotic
Ciprofloxacin Causes double-stranded DNA to break apart
Penicillin Prevents formation of crosslinks between murein chains
Using the information in Table 1, explain why each antibiotic is not effective against
HIV.
[2 marks]
Ciprofloxacin
Penicillin
6
Turn over for the next question
Turn over ►
*03*
IB/M/Jun24/7402/3
, 4
Do not write
outside the
0 2 box
A student investigated the effect of temperature on the rate of aerobic respiration in
woodlice.
Figure 1 shows the apparatus they used.
Figure 1
The student altered the temperature of the water bath and measured how far the drop
of coloured liquid moved every minute for 5 minutes.
0 2 . 1 Other than those stated, suggest two variables the student should have kept constant
in this investigation.
[1 mark]
1
2
*04*
IB/M/Jun24/7402/3
, 5
Do not write
outside the
0 2 . 2 box
Describe how the student used the apparatus in Figure 1 to reset the drop of coloured
liquid back to the right-hand end of the tubing.
[2 marks]
0 2 . 3 The student also set up a control experiment.
Suggest a suitable control experiment and explain why it was necessary.
[2 marks]
Control experiment
Explanation
Question 2 continues on the next page
Turn over ►
*05*
IB/M/Jun24/7402/3
, 6
Do not write
outside the
0 2 . 4 box
Figure 2 shows the student’s results at 25 °C
The mass of the woodlice in the tube was 3.78 g
Figure 2
Use Figure 1 (on page 4) and Figure 2 to calculate the mean rate of oxygen uptake
by the woodlice in mm3 s–1 g–1
The formula for the volume of the capillary tubing is π r2 l.
Use π = 3.14 in your calculation.
Show your working and give your answer to 2 decimal places.
[3 marks]
Answer mm3 s–1 g–1 8
*06*
IB/M/Jun24/7402/3
, 7
Do not write
outside the
0 3 . 1 box
Describe and explain the relationship between surface area to volume ratio of the
human body and metabolic rate.
[3 marks]
Question 3 continues on the next page
Turn over ►
*07*
IB/M/Jun24/7402/3
, 8
Do not write
outside the
Table 2 shows the height and mass of two adults. box
Table 2
Person Height / cm Mass / kg
A 181 90.90
B 149 62.62
The surface area of a person is estimated using the following formula:
height in cm × mass in kg
Surface area in m2 = � 3600
The volume of a person is estimated using the following formula:
mass in kg
Volume in m3 = 1010
0 3 . 2 Using suitable calculations, deduce which person has the smaller surface area to
volume ratio.
Show your working and complete the sentence below.
Give your answer to 3 significant figures.
[3 marks]
Person has the smaller surface area to volume ratio which =
*08*
IB/M/Jun24/7402/3
