Practice Paper: AQA A Level Biology 7402/02
(Paper 2)
Topics 5–8 with a comprehension question
Question paper
Written by AcePapers
Independent practice paper written for revision. Not an official AQA paper and not
affiliated with or endorsed by AQA.
Time allowed: 2 hours Total: 91 marks
You will need
• A pen, a pencil, a ruler and a scientific calculator.
Instructions
• Answer every question, writing your answers in the lined spaces. You may not
need all of the lines.
• Show your working in calculations and give units where they are needed.
• Question 10 is a comprehension question (15 marks) based on a short passage.
• The mark for each part is printed in brackets. Plan your time with it.
• Organisms and data labelled fictional, invented or illustrative were made up for
this paper.
Name: ______________________________________ Date: ________________
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 1
, Question 01
Photosynthesis takes place in chloroplasts.
01.1 A student separated chloroplast pigments by paper chromatography. One
pigment moved 4.4 cm and the solvent front moved 8.0 cm. Calculate the Rf
value of the pigment.
[1 mark]
Answer: ______________________
01.2 Describe how ATP and reduced NADP are produced in the light-dependent
reaction.
[4 marks]
01.3 Scientists suddenly lowered the concentration of carbon dioxide around some
illuminated algae. Explain what would happen to the amounts of glycerate
3-phosphate (GP) and ribulose bisphosphate (RuBP) in the chloroplasts.
[3 marks]
01.4 Explain why the rate of the light-independent reaction is affected by
temperature.
[1 mark]
Question 01 total: 9 marks
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 2
, Question 02
A student used a simple respirometer to measure the rate of aerobic respiration of
2.5 g of germinating peas. The tube containing the peas also contained potassium
hydroxide solution. The coloured liquid in the capillary tube (radius 0.4 mm) moved
18 mm in 10 minutes.
−1
02.1 Calculate the rate of oxygen uptake in mm³ g min−1. The volume of a
cylinder is πr²l. Give your answer to 2 significant figures.
[3 marks]
Answer: ______________________ mm³ g−1 min−1
02.2 Explain why potassium hydroxide solution was included.
[1 mark]
02.3 Explain why anaerobic respiration produces much less ATP per molecule of
glucose than aerobic respiration.
[3 marks]
02.4 Cyanide inhibits the enzyme that passes electrons to oxygen at the end of the
electron transfer chain. Explain why cyanide stops the production of ATP by
oxidative phosphorylation.
[2 marks]
Question 02 total: 9 marks
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 3
(Paper 2)
Topics 5–8 with a comprehension question
Question paper
Written by AcePapers
Independent practice paper written for revision. Not an official AQA paper and not
affiliated with or endorsed by AQA.
Time allowed: 2 hours Total: 91 marks
You will need
• A pen, a pencil, a ruler and a scientific calculator.
Instructions
• Answer every question, writing your answers in the lined spaces. You may not
need all of the lines.
• Show your working in calculations and give units where they are needed.
• Question 10 is a comprehension question (15 marks) based on a short passage.
• The mark for each part is printed in brackets. Plan your time with it.
• Organisms and data labelled fictional, invented or illustrative were made up for
this paper.
Name: ______________________________________ Date: ________________
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 1
, Question 01
Photosynthesis takes place in chloroplasts.
01.1 A student separated chloroplast pigments by paper chromatography. One
pigment moved 4.4 cm and the solvent front moved 8.0 cm. Calculate the Rf
value of the pigment.
[1 mark]
Answer: ______________________
01.2 Describe how ATP and reduced NADP are produced in the light-dependent
reaction.
[4 marks]
01.3 Scientists suddenly lowered the concentration of carbon dioxide around some
illuminated algae. Explain what would happen to the amounts of glycerate
3-phosphate (GP) and ribulose bisphosphate (RuBP) in the chloroplasts.
[3 marks]
01.4 Explain why the rate of the light-independent reaction is affected by
temperature.
[1 mark]
Question 01 total: 9 marks
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 2
, Question 02
A student used a simple respirometer to measure the rate of aerobic respiration of
2.5 g of germinating peas. The tube containing the peas also contained potassium
hydroxide solution. The coloured liquid in the capillary tube (radius 0.4 mm) moved
18 mm in 10 minutes.
−1
02.1 Calculate the rate of oxygen uptake in mm³ g min−1. The volume of a
cylinder is πr²l. Give your answer to 2 significant figures.
[3 marks]
Answer: ______________________ mm³ g−1 min−1
02.2 Explain why potassium hydroxide solution was included.
[1 mark]
02.3 Explain why anaerobic respiration produces much less ATP per molecule of
glucose than aerobic respiration.
[3 marks]
02.4 Cyanide inhibits the enzyme that passes electrons to oxygen at the end of the
electron transfer chain. Explain why cyanide stops the production of ATP by
oxidative phosphorylation.
[2 marks]
Question 02 total: 9 marks
Practice Paper 7402/02 (Paper 2) – Question paper Written by AcePapers | Page 3
