(a)[2]
In the space below, state whether X, Y or Z contains: transport proteins; pigments.
(b)[2]
A chloroplast also contains DNA. Suggest the roles of DNA in this organelle.
(c)[3]
Any change in atmospheric carbon dioxide concentration, light intensity and temperature can alter the rate of photosynthesis. These three factors directly influence different stages of photosynthesis. Complete the table below with a tick (✓) if the factor directly affects the stage or a cross (✗) if it does not.