In flowering plants, the light-dependent reactions are performed by photosynthetic pigments, which are divided into two groups: primary pigments and accessory pigments. Outline the role played by accessory pigments in the light-dependent reactions.
Photosynthetic pigments are organised into photosystems. There are two photosystems, PSI and PSII. PSI is involved in cyclic photophosphorylation, whereas PSII is not. Outline the differences between cyclic and non-cyclic photophosphorylation.
Explain why the rate of photosynthesis levels off at $30^\circ\text{C}$.
On Fig. 8.1 extend the curve to show what would happen to the rate of photosynthesis if the temperature rose to $70^\circ\text{C}$.
Explain why you have extended the curve in this way.
A palisade mesophyll cell has adaptations for photosynthesis. The table below shows some adaptations of a palisade mesophyll cell. Complete the table to show how these adaptations assist the cell in carrying out photosynthesis.