AQA
A-level
BIOLOGY
7402/3
Paper 3
Question Paper + Mark scheme [MERGED]
June 2022
, 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
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. 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.
*jun227402301*
IB/M/Jun22/E10 7402/3
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun22/7402/3
, 3
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 Amino acids are used to make proteins. Table 1 shows the R groups of six different
amino acids.
Table 1
Amino acid R group Amino acid R group
Alanine CH3 Glutamic acid CH2CH2COOH
Asparagine CH2CONH2 Glycine H
Aspartic acid CH2COOH Serine CH2OH
0 1 . 1 Use Table 1 to identify the three different amino acids used to make the polypeptide
shown in Figure 1.
[2 marks]
Figure 1
Left amino acid
Middle amino acid
Right amino acid
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun22/7402/3
A-level
BIOLOGY
7402/3
Paper 3
Question Paper + Mark scheme [MERGED]
June 2022
, 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
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. 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.
*jun227402301*
IB/M/Jun22/E10 7402/3
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun22/7402/3
, 3
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 Amino acids are used to make proteins. Table 1 shows the R groups of six different
amino acids.
Table 1
Amino acid R group Amino acid R group
Alanine CH3 Glutamic acid CH2CH2COOH
Asparagine CH2CONH2 Glycine H
Aspartic acid CH2COOH Serine CH2OH
0 1 . 1 Use Table 1 to identify the three different amino acids used to make the polypeptide
shown in Figure 1.
[2 marks]
Figure 1
Left amino acid
Middle amino acid
Right amino acid
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun22/7402/3
