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Q. No.Study the pathway given below-
In which of the following options, correct words for all the three blanks A, B and C are indicated?
A
B
C
1.
Fixation
Transamination
Regeneration
2.
Fixation
Decarboxylation
Regeneration
3.
Carboxylation
Decarboxylation
Reduction
4.
Decarboxylation
Reduction
Regeneration
83%
Level 1: 80%+
Hints
Water affects the process of photosynthesis in higher plants because:
| I: | Water stress can cause the stomata to close, hence, reducing the carbon dioxide availability. |
| II: | Water stress also makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Factors Affecting Photosynthesis |
92%
Level 1: 80%+
Hints
The correct chronological stages of the Calvin cycle will be:
| 1. | Carboxylation → Reduction → Regeneration |
| 2. | Carboxylation → Regeneration → Reduction |
| 3. | Regeneration → Reduction → Carboxylation |
| 4. | Reduction → Regeneration → Carboxylation |
Subtopic: Dark Reaction : Calvin Cycle |
95%
Level 1: 80%+
Hints
In the Z-scheme, transfer of electrons starts from:
| 1. | the PS II uphill to the acceptor, down the electron transport chain to PS I, transferred to another acceptor after excitation, and finally downhill to NADP+ reducing it to NADPH + H+. |
| 2. | the PS II downhill to the acceptor, down the electron transport chain to PS I, transferred to another acceptor after excitation, and finally uphill to NADP+ reducing it to NADPH + H+. |
| 3. | the PS I uphill to the acceptor, down the electron transport chain to PS II, transferred to another acceptor after excitation, and finally downhill to NADP+ reducing it to NADPH + H+. |
| 4. | the PS I downhill to the acceptor, down the electron transport chain to PS II, transferred to another acceptor after excitation, and finally uphill to NADP+ reducing it to NADPH + H+. |
Subtopic: Light Reaction: Electron Transport |
83%
Level 1: 80%+
Hints
The ‘light reaction’ of photosynthesis in higher plants does not include:
| 1. | Light absorption |
| 2. | Water splitting and oxygen release |
| 3. | Formation of ATP and NADPH |
| 4. | Fixation of carbon |
Subtopic: Dark Reaction: Biosynthetic Phase | Light Reactions |
90%
Level 1: 80%+
Hints
In the chloroplast:
| Statement I: | The membrane system is the site of enzymatic reactions leading to synthesis of sugar. |
| Statement II: | The stroma is responsible for trapping the light energy and also for the synthesis of ATP and NADPH. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
Subtopic: Chloroplast Structure |
61%
Level 2: 60%+
Hints
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Cyclic photophosphorylation results in the synthesis of ATP but not of NADPH + H+. |
| Reason (R): | The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain. |
| 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: Light Reaction: Photophosphorylation |
83%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match each item in Column-I with the one in Column-II regarding C4 plants and select the correct match from the codes given:
Codes:
| Column-I | Column-II | ||
| A. | Primary acceptor of carbon dioxide | P. | RuBP |
| B. | Cells in which Calvin cycle takes place | Q. | PEP |
| C. | Primary carbon dioxide fixation product | R. | Bundle sheath |
| D. | Example | S. | Mesophyll |
| T. | PGA | ||
| U. | OAA | ||
| V. | Sorghum | ||
| W. | Wheat |
| A | B | C | D | |
| 1. | Q | S | U | V |
| 2. | P | S | T | W |
| 3. | Q | R | U | V |
| 4. | P | R | T | W |
Subtopic: C4 Cycle (Hatch & Slack Pathway) | C4 Plants Examples |
74%
Level 2: 60%+
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Hints
Please attempt this question first.
Membranous system consisting of grana in the chloroplast:
| I: | is responsible for trapping the light energy. |
| II: | is responsible for the synthesis of ATP and NADPH. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Chloroplast Structure |
89%
Level 1: 80%+
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Hints
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The electrons that are moved from photosystem II are replaced by electron from:
1. PS I
2. Water
3. Glucose
4. Acetyl CoA
1. PS I
2. Water
3. Glucose
4. Acetyl CoA
Subtopic: Light Reaction: Electron Transport |
90%
Level 1: 80%+
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