Cc
AQA
Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
A-level
BIOLOG
Y
Paper 3
Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Questio Mark
a scientific calculator. n
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 outside 6
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.
[Type text]
,Cc
[Type text]
, 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 acids
Amino 1 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
Question 1 continues on the next page
Turn over ►
*03
IB/M/
* Jun22/7402/3
AQA
Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
A-level
BIOLOG
Y
Paper 3
Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Questio Mark
a scientific calculator. n
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 outside 6
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.
[Type text]
,Cc
[Type text]
, 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 acids
Amino 1 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
Question 1 continues on the next page
Turn over ►
*03
IB/M/
* Jun22/7402/3
