Q. No.The process which makes a major difference between C3 and C4 plants is:
| 1. | glycolysis | 2. | Calvin cycle |
| 3. | photorespiration | 4. | respiration |
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 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. |
1. 2
2. 3
3. 1
4. 0
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