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Q. No.What is the primary reason why the biosynthetic phase of photosynthesis is often referred to as the "dark reaction"?
| 1. | It occurs only in the absence of light. |
| 2. | It does not directly depend on light but uses products of the light reaction. |
| 3. | It uses ATP and NADPH to fix CO2. |
| 4. | It is an irreversible reaction that happens during the night. |
Subtopic: Â Chloroplast Structure |Â Dark Reaction: Biosynthetic Phase |
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The thylakoid membranes house the machinery for:
| 1. | Capturing light energy |
| 2. | Making ATP |
| 3. | Both (1) and (2) |
| 4. | Carrying out the Calvin cycle |
Subtopic: Â Chloroplast Structure |
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There is a clear division of labor within the chloroplast.
Which of the following is correct?
| Statement A: | The membrane system in the chloroplast is responsible for trapping light energy and facilitating the synthesis of ATP and NADPH. |
| Statement B: | The enzymatic reactions in the stroma synthesize sugars using ATP and NADPH, which are products of the light reactions. |
Which of the following is correct?
| 1. | Both Statement A and Statement B are correct. |
| 2. | Both Statement A and Statement B are incorrect. |
| 3. | Statement A is correct but Statement B is incorrect. |
| 4. | Statement A is incorrect but Statement B is correct. |
Subtopic: Â Chloroplast Structure |
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Where are the pigment molecules responsible for photosynthesis located?
| 1. | mitochondria |
| 2. | cytoplasm of the cell |
| 3. | stroma of the chloroplast |
| 4. | thylakoid membrane of the chloroplast |
Subtopic: Â Chloroplast Structure |
 85%
Level 1: 80%+
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Dark reactions of photosynthesis can take place only in the absence of light. |
| Reason (R): | Dark reactions are dependent on the products of the light reactions. |
| 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 Chloroplast Structure |Â Pigments |
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Level 1: 80%+
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The _____________ in the leaves, have a large number of_________, which align themselves along the walls of the ____________, such that they get the __________quantity of the incident light.
| 1. | chloroplasts, chlorophyll, chloroplasts, optimum |
| 2. | mesophyll cells, chlorophyll , mesophyll cells, optimum. |
| 3. | mesophyll cells, chloroplasts, mesophyll cells, optimum. |
| 4. | mesophyll cells, chloroplasts, mesophyll cells, minimum |
Subtopic: Â Chloroplast Structure |
 82%
Level 1: 80%+
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Light reactions and the Calvin Benson cycle occur in the
1. stroma.
2. chloroplasts.
3. cell wall.
4. thykaloids.
1. stroma.
2. chloroplasts.
3. cell wall.
4. thykaloids.
Subtopic: Â Chloroplast Structure |
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In a chloroplast the highest number of protons are found in
| 1. | lumen of thylakoids | 2. | inter membrane space |
| 3. | antenna complex | 4. | Stroma |
Subtopic: Â Chloroplast Structure |
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Energy is transferred from the light reaction step to the dark reaction step by
1. chlorophyll
2. ADP
3. ATP
4. RuBP
Subtopic: Â Introduction |Â Historical View: Experiments |Â Chloroplast Structure |Â Photosynthetic Pigments |Â Redtrop Experiment |Â Emerson's Enhancement Experiment |Â Photosystems |Â Light Reaction: Electron Transport |Â Light Reaction: Photophosphorylation |Â Dark Reaction: Biosynthetic Phase |
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Q. No.
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