Exam (elaborations)
AqA A-level BIOLOGY paper 3(7402/3) June 2024 CORRECT Question Paper
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AqA A-level BIOLOGY paper 3(7402/3) June 2024 CORRECT Question Paper
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aqaPlease 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
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 pages. 7
If you need extra space for your answer(s), use the lined pages at the end of TOTAL
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.
final 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]
, 3
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
Turn over ►
, 4
Do not write
outside the
0 2 A student investigated the effect of temperature on the rate of aerobic respiration in box
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
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