Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate ure
signat
A-level
BIOLO
GY
Paper 3
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
2
Instructions
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.
6
You must answer the questions in the spaces provided. Do
not write outside the box around each page or on blank 7
pages. TOTAL
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 78.
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 (1) that identify it. An
on its
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]
IB/M/
Jun24/7402/3
,3
Do not write
outside the
IB/M/
Jun24/7402/3
, 4
Do not write
outside the
0 1 .3 Table 1 shows the action of two antibiotics. box
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
IB/M/
Jun24/7402/3
Centre Candidate
number number
Surname
Forename(s)
Candidate ure
signat
A-level
BIOLO
GY
Paper 3
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
2
Instructions
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.
6
You must answer the questions in the spaces provided. Do
not write outside the box around each page or on blank 7
pages. TOTAL
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 78.
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 (1) that identify it. An
on its
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]
IB/M/
Jun24/7402/3
,3
Do not write
outside the
IB/M/
Jun24/7402/3
, 4
Do not write
outside the
0 1 .3 Table 1 shows the action of two antibiotics. box
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
IB/M/
Jun24/7402/3
