If temp is increased above 35 degree celcius..Then rate of decline of photosynthesis will be earlier than decline in respiration! Why?

The enzymes that carry out photosynthesis do not work efficiently, and this decreases the photosynthetic rate. This leads to a decrease in glucose production but the process of respiration is taking place at normal level.

Firstly chlorophyll destroy and second there is functioning of enzyme at certain temprature is fixed for all enzyme so they do not tolerate and deactivated