Assertion(A):
As a plant photosynthesises, many factors will simultaneously affect its rate.
Reason(R):
Usually one factor is the major cause or is the one that limits the rate.
Choices for Assertions and reasons:
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3.
(A) is true, but (R) is false.
4.
(A) is false, but (R) is true.
Subtopic: Factors Affecting Photosynthesis |
64%
From NCERT
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| Assertion(A): | When several factors affect any [bio] chemical process, Blackman’s (1905) Law of Limiting Factors comes into effect. |
| Reason(R): | At any point of photosynthesis, the rate will be determined by the factor available at sub-optimal levels. |
Choices for Assertions and reasons:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Factors Affecting Photosynthesis |
From NCERT
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| Assertion(A): | The effect of water as a factor is more through its effect on the plant, rather than directly on photosynthesis. |
| Reason(R): | Water stress also makes leaves wilt and increases metabolic activity as well. |
Choices for Assertions and reasons:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Factors Affecting Photosynthesis |
62%
From NCERT
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| Assertion(A): | Synthesis of ATP and NADPH during photosynthesis is a part of the light reaction. |
| Reason(R): | These reactions are light-driven. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Chloroplast Structure | Photosynthetic Pigments |
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| Assertion(A): | Splitting of water molecules takes place on the outer side of the inner chloroplast membrane. |
| Reason(R): | Splitting of water accumulates the protons within the lumen of the thylakoids. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Chemiosmotic hypothesis |
79%
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| Assertion(A): | Scientists believed that the primary acceptor of CO2 should be a 2C compound. |
| Reason(R): | The first product was a C3 acid in the dark reaction. |
Choices for Assertions and reasons:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: WHERE ARE THE ATP AND NADPH USED |
55%
From NCERT
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| Assertion(A): | RUBP carboxylase is called RuBisCO. |
| Reason(R): | It has more prominent oxygenase activity. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Dark Reaction : Calvin Cycle |
71%
From NCERT
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| Assertion(A): | Green plants are called autotrophs. |
| Reason(R): | The green plants synthesise the food they need through photosynthesis. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Factors Affecting Photosynthesis |
94%
From NCERT
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| Assertion(A): | Oxygen evolved from green plants actually comes from the water molecule. |
| Reason(R): | This was proved using radioisotope techniques. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Historical View: Experiments |
50%
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| Assertion (A): | Photorespiration decreases the rate of photosynthesis. |
| Reason (R): | RUBISCO can also behave as an oxygenase |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Photorespiration | Factors Affecting Photosynthesis |
52%
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