Contents

How much temperature is needed for the process of photosynthesis?
a) very high                          
b) very low
c) optimum                          
d) none of them

c

Increase in temperature above optimum value …….the rate of photosynthesis.
a) speeds up                         
b) slows down
c) doesn’t affect                 
d) none of these

b

Decrease in temperature below optimum value ………the rate of photosynthesis.
a) speeds up                         
b) lowers down
c) doesn’t affect                 
d) none of these

b

Generally the value of optimum temperature for photosynthesis is…….
a) 10 - 15° C                        
b) 15 - 20° C
c) 20 - 25° C                        
d) 20 - 30° C


d

At freezing temperature, the rate of photosynthesis is……
a) fast                                   
b) slow
c) zero                                  
d) moderate

c

Respiration: