Identify the statement that is true for C4 plants but not for C3 plants?
| 1. | Initially fix carbon dioxide in mesophyll cells as 4-carbon long compounds. |
| 2. | Initially fix carbon dioxide in bundle sheath cells as 3-carbon long compounds. |
| 3. | Initially fix carbon dioxide in mesophyll cells as 3-carbon long compounds. |
| 4. | Initially fix carbon dioxide in bundle sheath cells as 4-carbon long compounds. |
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in
1. C3 -plants
2. C4 -plants
3. C2 -plants
4. C3 and C4 -plants
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
| 1. | Light saturation for CO2-fixation occurs at 10% of full sunlight. |
| 2. | Increasing atmospheric CO2 concentration upto 0.05% can enhance the CO2-fixation rate |
| 3. | C3 plants respond to higher temperature with enhanced photosynthesis, while C4 plants have a much lower temperature optimum. |
| 4. | Tomato is a greenhouse crop, which can be grown in a CO2-enriched atmosphere for higher yield. |
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
1. C4
2. CAM
3. Nitrogen-fixer
4. C3
The first carbon dioxide fixation product of C4 plant is
| 1. | Oxaloacetic acid | 2. | ribulose biphosphate |
| 3. | phosphoenol pyruvate | 4. | phosphoglyceric acid. |
What is correct about C4 plant?
p. They have special type of leaf anatomy
q. They tolerate high temperature
r. They lack a process called photorespiration
s. Have lesser productivity
t. Show no response to highlight intensities
a. pst
b. qrst
c. prst
d. pqr
What is incorrect about bundle sheath cells-
| 1. | Multilayered |
| 2. | large number of chloroplasts |
| 3. | Intercellular spaces |
| 4. | Thick walls |
Where exactly is, the PEP case found?
| 1. | Only Mesophyll cells | 2. | Bundle Sheath cells |
| 3. | both a and b | 4. | Passage cells |
Which C4 compound is transported in Bundle Sheath cell?
1. Malate
2. Aspartate
3. OAA
4. 1 and 2 both
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