Q. No.The catalytic knobs of ATP synthetase in a thylakoid membrane is located:
1.
on the side facing the thylakoid space.
2.
on the stroma side of the membrane.
3.
embedded deep within the membrane
4.
on the pigments molecules of Photosystems
Carbon dioxide provided to a C4 plant is radioactively labeled. As the photosynthesis in this plant gets underway, radioactivity if expected to occur first in:
1. Oxaloacetic acid
2. PEP
3. Malic acid
4. RuBP
Photorespiration is avoided by C4 plants primarily because:
| 1. | They do not participate in the Calvin cycle. |
| 2. | They use PEP carboxylase to initially fix CO2. |
| 3. | They conserve water more efficiently. |
| 4. | They are adapted to cold, wet climates. |
The correct sequence of flow of electron during light dependent reactions in plants is:
| 1. | P680 → P700 → water → NADP+ |
| 2. | water → P700 → NADP+→ P680 |
| 3. | P700 → P680 → NADP+→ water |
| 4. | water → P680 → P700 → NADP+ |
The correct sequential involvement of organelles in the photorespiratory pathway is:
| 1. | Chloroplast → Peroxisome → Mitochondria |
| 2. | Chloroplast → Mitochondria → Peroxisome |
| 3. | Mitochondria → Chloroplast → Peroxisome |
| 4. | Mitochondria → Peroxisome → Chloroplast |
Consider the given statements:
| I. | In C4 plants light reactions occur in mesophyll cells whereas the carbon dioxide assimilation is carried out in bundle sheath cells |
| II. | In CAM plants, the events are separated in time but occur in the same type of cells. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Consider the two statements:
| I. | The current availability of carbon dioxide in the atmosphere is limiting for C3 plants. |
| II. | C3 plants attain saturation at much higher carbon dioxide concentration than that present in the current atmosphere. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | Both I and II are correct |
If the given pyrrole ring is of chlorophyll a molecule, X should be:
1. -CHO
2. -CH3
3. -CH2OH
4. -CH3COOH
In light reaction, plastoquinone facilitates the transfer of electrons from:
| 1. | Cytb6f complex to PS I | 2. | PS I to NADP+ |
| 3. | PS I to ATP synthase | 4. | PS II to Cytb6f complex |
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