I: | is the most abundant enzyme in the world |
II: | is characterised by the fact that its active site can bind to both CO2 and O2 |
III: | has a much greater affinity for CO2 when the CO2: O2 is nearly equal |
The 2-carbon compound formed in photorespiration is:
1. | Acetyl CoA | 2. | Phosphoglycolate |
3. | Acetic acid | 4. | Ethanol |
I: | there is no synthesis of sugars |
II: | there is release of carbon dioxide with the utilization of ATP |
III: | ATP is synthesized but NADPH is not synthesized |
Photorespiration is a wasteful process. Why is it so?
1. | The number of ATP molecules produced in the pathway is very low. |
2. | The number of NADPH molecules produced in the pathway is very low. |
3. | The synthesis of sugars in the pathway requires a large input of ATP energy. |
4. | There is neither synthesis of sugars, nor of ATP in the pathway. |
The greatest problem with photorespiration is faced by:
1. | C4 plants | 2. | C3 plants |
3. | CAM plants | 4. | purple sulfur bacteria |
The process of photosynthesis has lower efficiency if photorespiration occurs because of the reduced formation of:
1. | AcetylCoA | 2. | 3-phosphoglycerate |
3. | ATP | 4. | RuBP |
Statement I: | In C4 plants, photorespiration does not occur. |
Statement II: | C4 plants have a mechanism that increases the concentration of CO2 at the RuBisCO enzyme site. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is incorrect; Statement II is correct |
3. | Statement I is correct; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is incorrect |