The binding of RuBisCO for O2 and CO2 is –
a. Non-competitive
b. Competitive
c. Uncompetitive
d. Mixed

The product of photorespiration-
a. Phosphoglycerate
b. Phosphoglycolate
c. both a and b
d. Malate

Which of the following is wrong regarding photorespiration?
1. utilization of ATP
2. Production of little sugar
3. Release of CO₂
4. Wasteful Process

In C4 plants, photorespiration does not occur-
a. They have different RuBisCO.
b. They have no RuBisCO.
c. They have mechanism to increase the concentration of CO2
d. They cannot utilize ATP

At any point, the rate of photosynthesis is determined by the factor which is available at---------- levels.
a. optimal
b. higher than required
c. sub-optimal
d. won’t depend

Who gave the law of limiting factors and when?
a. Lieman-1906
b. Blackman-1905
c. Lieman-1905
d. Blackman-1906

What kind of graph one will obtain if he observes CO2 fixation rates at low intensities?
a. Parabola
b. Linear
c. Circular
d. Hyperbola

Light is a limiting factor for plants in shade-
a. as they do not get full sunlight
b. as they do not get at most 10 % of full sunlight
c. as they do not get at least 50 % of full sunlight
d. as they do not get at most 70% full sunlight

What is the major limiting factor for photosynthesis?
a. CO2
b. Water
c. Sunlight
d. Chlorophyll

At low light conditions, which plant responds to high CO2 conditions?
a. C3
b. C4
c. Neither
d. Both