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4.1 Photosynthesis

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Question 8

A botanist writes this proposed symbol equation for photosynthesis in a fern frond:

3CO2+6H2O→C6H12O6+6O23\text{CO}_2 + 6\text{H}_2\text{O} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_23CO2​+6H2​O→C6​H12​O6​+6O2​

Only one coefficient is incorrect.

Which correction balances the equation?

[1]
A

Change the coefficient of carbon dioxide from 3 to 6.

B

Change the coefficient of oxygen from 6 to 12.

C

Place a coefficient of 2 before the formula for glucose.

D

Change the coefficient of water from 6 to 3.

Markscheme

4.1 Photosynthesis Questions

  1. GCSE
  2. /Biology
  3. /4.1 Photosynthesis

68 exam-style questions on AQA GCSE Biology 4.1 Photosynthesis, covering 4.1.1 Photosynthetic reaction, 4.1.2 Rate of photosynthesis, and 4.1.3 Uses of glucose from photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.

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