Photosynthesis GCSE Exam-Style Questions

Question 1

Q1. Knowledge Recall (1 mark)

Define chlorophyll and state its function in photosynthesis.

Question 2

Q2. Application (2 marks)

Explain why plants with larger leaves have a greater rate of photosynthesis.

Question 3

Q3. Data Analysis (3 marks)

The table shows the effect of light intensity on the rate of photosynthesis.

Light Intensity (arbitrary units)

Rate of Photosynthesis (arbitrary units)

a) Plot a graph of the data. (1 mark)

b) What is the relationship between light intensity and the rate of photosynthesis? (1 mark)

c) Explain the relationship observed. (1 mark)

Question 4

Q4. Knowledge Recall (1 mark)

What is the equation for photosynthesis?

Question 5

Q5. Application (2 marks)

Explain how the presence of oxygen affects the rate of photosynthesis.

Question 6

Q6. Data Analysis (3 marks)

The graph shows the effect of carbon dioxide concentration on the rate of photosynthesis.

Carbon Dioxide Concentration (%)

Rate of Photosynthesis (arbitrary units)

0.03

0.06

0.09

0.12

a) Plot a graph of the data. (1 mark)

b) What is the relationship between carbon dioxide concentration and the rate of photosynthesis? (1 mark)

c) Explain the relationship observed. (1 mark)

Question 7

Q7. Knowledge Recall (1 mark)

What is the name of the light-independent reaction in photosynthesis?

Question 8

Q8. Application (2 marks)

Explain how the rate of photosynthesis is affected by temperature.

Question 9

Q9. Data Analysis (3 marks)

The table shows the rate of photosynthesis in different plant species.

0.15

100

Plant Species

Rate of Photosynthesis (arbitrary units)

Oak

Willow

Maple

Calculate the mean rate of photosynthesis for the four plant species. (2 marks)

Mean = 45

State one factor that could account for the difference in rates of photosynthesis between the species. (1 mark)

Different leaf structures/chloroplast content/enzyme activity/light absorption

Question 10

Q10. Knowledge Recall (1 mark)

What is the role of ATP and NADPH in photosynthesis?

Pine

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