Q. No.The extra ATP required [as compared to NADPH] in Calvin cycle comes from:
1.
photosystem II
2.
photosystem I
3.
cyclic electron flow
4.
non cyclic electron flow
In the given simplified diagram of the Calvin Cycle,
ATP is utilized at points:
1. A and B only
2. A and C only
3. B and C only
4. A, B and C
The chronological order of organelles involved in the photorespiration cycle is:
| 1. | chloroplasts, leaf peroxisomes and mitochondria |
| 2. | chloroplasts, mitochondria and leaf peroxisomes |
| 3. | mitochondria, chloroplasts, and leaf peroxisomes |
| 4. | mitochondria, leaf peroxisomes and chloroplasts |
In the diagram showing relation between Calvin cycle and Photorespiration the molecule labeled X can be:
1. Oxygen
2. Ammonia
3. Nitric oxide
4. Hydrogen sulfide
Chemiosmosis in chloroplasts is possible because of:
| 1. | establishment of a proton gradient across the thylakoid membrane. |
| 2. | diffusion of electrons through the ATP synthase. |
| 3. | osmosis of water from thylakoid to stroma. |
| 4. | presence of large amount of oxygen in the stroma. |
The ATP synthase complexes in a plant cell are located:
| I: | in the thylakoid membrane |
| II: | in the plasma membrane |
| III: | in the inner mitochondrial membrane |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
In chloroplasts, protons are actively pumped from
| 1. | the intermembrane space to the matrix. |
| 2. | the matrix to the stroma. |
| 3. | the stroma to the thylakoid space. |
| 4. | the thylakoid space to the intermembrane space. |
The following diagram shows the photosynthetic carbon cycle. A and B can respectively be:
| 1. | Pyruvate; malate or aspartate |
| 2. | Phoshoglycerate; fumarate or aspartate |
| 3. | Phosphoenol pyruvate; malate or aspartate |
| 4. | Phosphoenol pyruvate; fumarate or aspartate |
The relationship between photosynthesis and respiration can be best described as:
| 1. | Photosynthesis and respiration are reversal of each other in biochemical pathways. |
| 2. | Photosynthesis stores energy in complex organic molecules, while respiration releases it. |
| 3. | Respiration occurs only in animals and photosynthesis occurs only in plants. |
| 4. | Respiration results in formation of ATP but photosynthesis can only use them. |
Probably the strongest biological oxidizing agent is P680+ because:
| 1. | It accepts electron in both photosystems. |
| 2. | It transfers electrons to plastoquinone. |
| 3. | It strongly attracts electrons formed by the splitting of water. |
| 4. | It transfers electrons to plastocyanin. |
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