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: Â 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: Â 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: Â 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: Â Photorespiration |Â Factors Affecting Photosynthesis |
 52%
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| Assertion (A): | During photophosphorylation light energy is utilized to produce the proton gradient that is required for ATP synthesis |
| Reason (R): | Oxidative phosphorylation results as the energy of oxidation-reduction is utilized for phosphorylation. |
| 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: Â Chemiosmotic hypothesis |
 64%
From NCERT
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Consider the given two statements:
| Assertion (A): | Chief photosynthetic pigment is chlorophyll a but plants evolved some other pigments also. |
| Reason (R): | Photosynthetic efficiency is increased due to absorptions of variety of wavelengths. |
| 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 Correct. |
Subtopic: Â Pigments |
 68%
From NCERT
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Match the name of the scientist in Column I with his contribution in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Julius von Sachs | P. | O2 evolved by the green plant comes from H2O |
| B. | T.W. Engelmann | Q. | Glucose is usually stored as starch by plants |
| C. | Cornelius van Niel | R. | Sunlight is essential for photosynthesis |
| D. | Jan Ingenhousz | S. | First action spectrum of photosynthesis |
| A | B | C | D | |
| 1. | Q | S | P | R |
| 2. | Q | R | P | S |
| 3. | P | Q | R | S |
| 4. | P | S | R | Q |
Subtopic: Â Historical View: Experiments |
 89%
From NCERT
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At low light conditions, which of the following groups of plants responds to high CO2 conditions?
| 1. | C3 | 2. | C4 |
| 3. | Both C3 and C4 | 4. | Neither C3 nor C4 |
Subtopic: Â Factors Affecting Photosynthesis |
 56%
From NCERT
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The water-splitting complex in green plants is associated with:
| 1. | PS I, which itself is physically located on the inner side of the membrane of the thylakoid. |
| 2. | PS I, which itself is physically located on the outer side of the membrane of the thylakoid. |
| 3. | PS II, which itself is physically located on the inner side of the membrane of the thylakoid. |
| 4. | PS II, which itself is physically located on the outer side of the membrane of the thylakoid. |
Subtopic: Â Light Reaction: Electron Transport |
 83%
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The numbers of ATP and NADPH molecules required to make one molecule of glucose through the Calvin pathway, respectively, are:
1. 9 and 6
2. 18 and 12
3. 6 and 9
4. 12 and 18
1. 9 and 6
2. 18 and 12
3. 6 and 9
4. 12 and 18
Subtopic: Â Dark Reaction : Calvin Cycle |
 84%
From NCERT
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