Question 1
FA student investigated the effect of light intensity on the rate of photosynthesis in pondweed.
The Figure shows the apparatus.
Figure
a.[1]
State the independent variable in this investigation.
b.[2]
Describe how the student could use the apparatus in the Figure to measure the rate of photosynthesis.
c.[2]
Explain why X was placed between the lamp and the pondweed.
d.[2]
The pondweed was placed in sodium hydrogencarbonate solution.
Explain why.
e.[1]
Each time the lamp was moved, the student waited 5 minutes before taking any measurements.
Give a reason why.
6.1 Photosynthesis Questions
44 exam-style questions on Edexcel GCSE Biology 6.1 Photosynthesis, covering 6.1.1 Photosynthetic organisms as producers, 6.1.2a Limiting factors on the rate of photosynthesis, 6.1.2b Interactions of limiting factors on photosynthesis, and 6.1.3 Inverse square law and light intensity. Each one has a worked solution and a mark scheme showing where the marks go.