K.C.S.E Biology Q & A - MODEL 2014PP2QN07

K.C.S.E Biology Q & A - MODEL 2014PP2QN07

Explain how each of the following factors affects the rate of photosynthesis:
(i) temperature; 
(ii) chlorophyll concentration.

answers

(i) Reactions in photosynthesis are catalysed by enzymes; at optimum temperature photosynthesis proceeds faster;
Below optimum temperature the rate of photosynthesis decreases because enzymes are inactivated by the low temperatures / above optimum the rate
of photosynthesis decreases because enzymes are denatured; 
(ii) Chlorophyll traps energy from sunlight for photosynthesis;
The higher the chlorophyll concentration the higher the rate of photosynthesis and vice versa;