A pupil represents photosynthesis using the letters P, Q, R and S.
P + Q → R + S
The table gives one clue for each letter.
| Letter | Clue |
|---|---|
| P | a reactant that enters the leaf through the stomata |
| Q | a reactant that is taken up from the soil by the roots |
| R | a product that the plant can convert into starch |
| S | a product that leaves the leaf through the stomata |
Use words from this list:
carbon dioxide chlorophyll glucose oxygen water
One word will not be used.
Name the substances represented by P and Q.
Name the substances represented by R and S.
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.