A-LEVEL BIOLOGY
Paper 3 – Synoptic Assessment
Time allowed: 2 hours
CANDIDATE NUMBER
CENTER NUMBER
DATE
SECTION
A
B
C
TOTAL
Instructions:
• Answer all questions.
• Use black ink or ball-point pen.
• Write your answers in the spaces provided.
• Show all working for calculations.
• The maximum mark for this paper is 90.
• Marks for each question are shown in brackets.
• Quality of written communication will be assessed in extended responses.
,Section A: Practical Skills and Data Analysis
Question 1 – Investigating Enzyme Activity (12 marks)
A student investigates the effect of substrate
concentration on enzyme catalase activity by measuring
oxygen production.
1. (a) Identify two variables the student should
control. (2 marks)
2. (b) Sketch the expected graph of rate of reaction
against substrate concentration. (4 marks)
, 3. (c) Explain why the rate levels off at high substrate
concentrations. (3 marks)
4. (d) Suggest one improvement to increase accuracy
of results. (3 marks)
Paper 3 – Synoptic Assessment
Time allowed: 2 hours
CANDIDATE NUMBER
CENTER NUMBER
DATE
SECTION
A
B
C
TOTAL
Instructions:
• Answer all questions.
• Use black ink or ball-point pen.
• Write your answers in the spaces provided.
• Show all working for calculations.
• The maximum mark for this paper is 90.
• Marks for each question are shown in brackets.
• Quality of written communication will be assessed in extended responses.
,Section A: Practical Skills and Data Analysis
Question 1 – Investigating Enzyme Activity (12 marks)
A student investigates the effect of substrate
concentration on enzyme catalase activity by measuring
oxygen production.
1. (a) Identify two variables the student should
control. (2 marks)
2. (b) Sketch the expected graph of rate of reaction
against substrate concentration. (4 marks)
, 3. (c) Explain why the rate levels off at high substrate
concentrations. (3 marks)
4. (d) Suggest one improvement to increase accuracy
of results. (3 marks)
