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Q. No.Chemiosmosis does not require:
1. a membrane leaky to protons
2. a proton pump
3. a proton gradient
4. ATP synthase
Subtopic: Chemiosmotic hypothesis |
92%
From NCERT
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In order to assimilate one \(\text {CO}_2\) molecule via photosynthesis, the green plants require:
1. 9 ATP and 6 NADPH molecules
2. 5 ATP and 3 NADPH molecules
3. 3 ATP and 2 NADPH molecules
4. 18 ATP and 12 NADPH molecules
1. 9 ATP and 6 NADPH molecules
2. 5 ATP and 3 NADPH molecules
3. 3 ATP and 2 NADPH molecules
4. 18 ATP and 12 NADPH molecules
Subtopic: Dark Reaction : Calvin Cycle |
75%
From NCERT
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Which of the following is not a factor that directly affects the rate of photosynthesis?
1. Concentration of chlorophyll
2. Soil fertility
3. Light intensity
4. Temperature
1. Concentration of chlorophyll
2. Soil fertility
3. Light intensity
4. Temperature
Subtopic: Factors Affecting Photosynthesis |
85%
From NCERT
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Which of the following is a key difference between C3 and C4 plants?
| 1. | C4 plants perform photosynthesis only at night. |
| 2. | C3 plants have a higher water-use efficiency than C4 plants. |
| 3. | C4 plants utilize PEP carboxylase to capture CO₂, resulting in lack of photorespiration. |
| 4. | C3 plants have a mechanism to concentrate CO₂ in bundle sheath cells, unlike C4 plants. |
Subtopic: Question on C4 Pathway |
93%
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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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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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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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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Photochemical phase of oxygenic photosynthesis does not include:
1. Light absorption
2. Water splitting
3. Formation of ATP and NADPH
4. Synthesis of sugar
1. Light absorption
2. Water splitting
3. Formation of ATP and NADPH
4. Synthesis of sugar
Subtopic: Light Reaction: Electron Transport |
93%
From NCERT
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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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