Q. No.Consider the given two statements:
Statement I: Water molecules appear on both side of the equation for photosynthesis in higher plants.
Statement II: The water molecules that enter the reaction are not the same molecules that emerge from the reaction.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct and Statement II is incorrect
4. Both Statement I and Statement Ii are incorrect
A: Photosynthesis includes both light-dependent and light-independent reactions.
B: Enzymes must carry out the light-independent reactions.
| 1. | Only A | 2. | Only B |
| 3. | Both A and B | 4. | Neither A nor B |
| I: | A possible location where this could be happening is in the stroma lamellae. |
| II: | While the membrane or lamellae of the grana have both PS I and PS II, the stroma lamellae membranes lack PS II as well as NADP reductase enzyme. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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I. The whole scheme of transfer of electrons, starting from the PS II, uphill to the acceptor, down the electron transport chain to PS I, excitation of electrons, transfer to another acceptor, and finally down-hill to NADP+ reducing it to NADPH + H+ is called the Z scheme.
II. The electrons that are moved from photosystem II get replaced by electrons available due to splitting of water.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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The conclusions that can be drawn from these experiments will be:
I. Plants restore to the air whatever breathing animals and burning candles remove.
II. Sunlight is essential to the plant process that somehow purifies the air fouled by burning candles or breathing animals.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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| I: | Water stress can cause the stomata to close, hence, reducing the carbon dioxide availability. |
| II: | Water stress also makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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| 1. | 0.03 to 0.04 | 2. | 0.04 to 0.05 |
| 3. | 0.05 | 4. | more than 0.05 |
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| Statement I: | Green house crops such as tomatoes and bell pepper are allowed to grow in carbon dioxide enriched atmosphere. This leads to higher yields. |
| Statement II: | C3 plants respond to higher carbon dioxide concentration by showing increased rates of photosynthesis, leading to higher productivity. |
| 1. | Both Statement I and Statement II are correct and Statement II explains Statement I |
| 2. | Both Statement I and Statement II are correct but Statement II does not explain Statement I |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
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Statement I: Except for plants in shade or in dense forests, light is rarely a limiting factor in nature.
Statement II: There is a linear relationship between incident light and carbon dioxide fixation rates at low light intensities.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
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Statement I: Despite the presence of a green leaf, optimal light and carbon dioxide conditions, the plant may not photosynthesize if the temperature is very low.
Statement II: If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
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