Q. No.During oxygenic photosynthesis in chloroplasts, the liberated oxygen comes from ______ and the reactions leading to its liberation are associated with ______.
1. CO2, PS II
2. H2O, PSII
3. CO2, Calvin cycle
4. H2O, PS I
1. CO2, PS II
2. H2O, PSII
3. CO2, Calvin cycle
4. H2O, PS I
Where are the carriers of the electrons located in a chloroplast?
| 1. | within thylakoid membranes |
| 2. | in the intra thylakoid space |
| 3. | within the inner membrane |
| 4. | in the intermembrane space [between outer and inner membrane] |
Calvin cycle consumes more ATP than NADPH. What is the source of this extra ATP needed?
1. PS I
2. PS II
3. Cyclic electron flow
4. Linear electron flow
An increased leakiness of the thylakoid membrane will directly effect:
| 1. | the photolysis of water |
| 2. | synthesis of ATP |
| 3. | electron flow from PSII to PSI |
| 4. | The reduction of NADP+ |
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 |
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