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 2
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.
5
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s).
8
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want 9
to be marked. 10
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
SOLE Property of Tyrion's AQA AL Biology Question Paper 2 2025 Predicted
, 2
Answer all questions in the spaces provided.
0 1 . 1 Figure below shows the molecular structure of a polypeptide, including parts of
the secondary and tertiary structure.
0 1 . 1 Describe the difference between the primary, secondary, and tertiary
structures of a protein. (3 marks)
[3 marks]
0 1 . 2 Explain how hydrogen bonds contribute to the formation of the secondary structure
of a protein.
[2 marks]
AQA AL Biology Question Paper 2 2025 Predicted
, 3
0 1 . 3 Describe how the amino acid sequence affects the final shape of a polypeptide.
[2 marks]
0 1 . 4 Describe the role of enzymes in catalyzing reactions and explain why their
activity is affected by changes in pH.
[2 marks]
9
AQA AL Biology Question Paper 2 2025 Predicted
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
BIOLOGY
Paper 2
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.
5
• You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s).
8
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want 9
to be marked. 10
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
SOLE Property of Tyrion's AQA AL Biology Question Paper 2 2025 Predicted
, 2
Answer all questions in the spaces provided.
0 1 . 1 Figure below shows the molecular structure of a polypeptide, including parts of
the secondary and tertiary structure.
0 1 . 1 Describe the difference between the primary, secondary, and tertiary
structures of a protein. (3 marks)
[3 marks]
0 1 . 2 Explain how hydrogen bonds contribute to the formation of the secondary structure
of a protein.
[2 marks]
AQA AL Biology Question Paper 2 2025 Predicted
, 3
0 1 . 3 Describe how the amino acid sequence affects the final shape of a polypeptide.
[2 marks]
0 1 . 4 Describe the role of enzymes in catalyzing reactions and explain why their
activity is affected by changes in pH.
[2 marks]
9
AQA AL Biology Question Paper 2 2025 Predicted
