Question
Photorespiration is favoured by
high O2 and low CO2
high CO2 and low O2
high temperature and low O2
high humidity and temperature
Solution
A.
high O2 and low CO2
Photorespiration is a respiratory process in many higher plants by which they take up oxygen in the light and give out some carbon- dioxide.
Oxygen is a competitive inhibitor of CO2 fixation. Increase in O2 concentration would favour the uptake of oxygen by Rubisco leading to increase in photorespiration.
