The process which makes a major difference between C₃ and C₄ plants is:

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

The Bundle sheath cells are rich in -------- while lacks----.
a. RuBisCo, PEPCase
b. PEPCase, RuBisCo
c. ATPase, Hydrolase
d. Hydrolase, ATPase

Why photorespiration does not take place in C₄ plants?
1. Do not contain RuBisCo.
2. Have a mechanism that increases the concentration of CO₂ at the enzyme site.
3. Cells do not allow oxygen to accumulate in them.
4. Cells are impermeable to oxygen.

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

Photorespiration shows formation of 

1. sugar but not ATP

2. ATP but not sugar

3. both ATP and sugar

4. neither ATP nor sugar.

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

The evolution of C₄ photosynthetic system is probably one of the strategies for

1. Maximising the availability of CO₂ and minimising the loss of H₂O

2. Minimising the loss of O₂ and maximising the avilability of H₂O

3. Minimising the availability of CO₂ and maximising the loss of H₂O

4. More than one option is correct

In photorespiration (C₂ cycle)
1. Glycolate is oxidised in mitochondria
2. CO₂ is released in peroxisome
3. Expenditure of ATP occurs
4. Light is utilised by all three organelles involved

How many of them are wrong?
p. RuBisCO is the most abundant enzyme in plants only.
q. RuBisCO has active site for O2 only
s. C3 cycle in C4 plants occur in Bundle sheath cells.

a. 2
b. 3
c. 1
d. 0