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Q. No.What is the key difference between the reaction center chlorophyll molecule and other pigment molecules in a photosystem?
1.
Reaction center chlorophyll molecules are less abundant than other pigments.
2.
Only reaction center chlorophyll molecules can transfer the excited electron to an electron acceptor.
3.
Other pigment molecules do not participate in the light reactions of photosynthesis.
4.
Reaction center chlorophyll molecules are located in the stroma, while other pigments are in the thylakoid membrane.
Subtopic: Light Reaction: Electron Transport |
68%
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Consider the given two statements:
| Assertion (A): | Kranz anatomy is crucial for the efficiency of C4 plants. |
| Reason (R): | Kranz anatomy allows for a higher concentration of carbon dioxide at the site of the Calvin cycle. |
| 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: C4 Cycle (Hatch & Slack Pathway) |
81%
From NCERT
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Rubisco enzyme is involved in two activities, which are:
| 1. | Photolysis of water and carbon fixation |
| 2. | Carbon fixation and oxygenation of RuBP |
| 3. | ATP synthesis and NADPH formation |
| 4. | Oxygen evolution and reduction of carbon dioxide |
Subtopic: Dark Reaction : Calvin Cycle |
90%
From NCERT
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What role does chlorophyll b play in photosynthesis?
| 1. | It acts as the primary pigment absorbing light for photosynthesis. |
| 2. | It assists chlorophyll a by expanding the range of light wavelengths that can be absorbed. |
| 3. | It is directly involved in the conversion of light energy to chemical energy. |
| 4. | It protects chlorophyll a from photodamage by dissipating excessive light. |
Subtopic: Photosynthetic Pigments |
56%
From NCERT
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What is the most important role that accessory pigments play in photosynthesis?
| 1. | They protect chlorophyll b from photodamage. |
| 2. | They absorb light and transfer energy to chlorophyll. |
| 3. | They catalyze the splitting of water. |
| 4. | They fix carbon dioxide into sugars. |
Subtopic: Photosynthetic Pigments |
91%
From NCERT
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What is a critical difference between cyclic and non-cyclic photophosphorylation?
| 1. | Cyclic photophosphorylation produces ATP and NADPH, while non-cyclic produces only ATP. |
| 2. | Non-cyclic photophosphorylation involves both photosystems, while cyclic involves only one. |
| 3. | Cyclic photophosphorylation produces oxygen, whereas non-cyclic does not. |
| 4. | Non-cyclic photophosphorylation requires light, cyclic does not. |
Subtopic: Light Reaction: Photophosphorylation |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | The rate of photosynthesis increases with light intensity up to a certain point. |
| Reason (R): | Chlorophyll can only absorb a limited amount of light energy at a time. |
| 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: Factors Affecting Photosynthesis |
From NCERT
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The primary products of the Calvin cycle include:
| 1. | Oxygen and glucose |
| 2. | ATP and NADPH |
| 3. | Glucose, ADP, and NADP+ |
| 4. | G3P (Glyceraldehyde-3-Phosphate), ADP, and NADP+ |
Subtopic: Dark Reaction : Calvin Cycle |
From NCERT
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What are correct differences between C3 plants and C4 plants?
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | Primary CO2 acceptor in C3 plants is RuBP and PEP in C4 plants |
| II: | Calvin cycle takes place in mesophyll cells in C3 plants and in bundle sheath cells in C4 plants. |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: C4 Cycle (Hatch & Slack Pathway) | CAM Pathway |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | The term "dark reaction" is considered a misnomer for the Calvin cycle. |
| Reason (R): | These reactions do not require darkness to occur, but rather they do not directly require light. |
| 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 |
88%
From NCERT
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