Photosynthesis Question 17
17. At a temperature above $35^{\circ} C$
[1992]
(a) rate of photosynthesis will decline earlier than that of respiration
(b) rate of respiration will decline earlier than that of photosynthesis
(c) there is no fixed pattern
(d) both decline simultaneously
Show Answer
Answer : a
Hints & Solution
(a) The optimum temperature of photosynthesis is $10^{\circ}-25^{\circ} C$ for $C_3$ plants and $30^{\circ}-45^{\circ} C$ for $C_4$ plants.
