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Q. No.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
Subtopic: Dark Reaction : Calvin Cycle |
83%
From NCERT
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The reaction centres in PSI and PSII in higher plants are respectively called as:
1. P680 and P700
2. P700 and P680
3. P870 and P700
4. P680 and P870
1. P680 and P700
2. P700 and P680
3. P870 and P700
4. P680 and P870
Subtopic: Photosystems | Light Reaction: Electron Transport |
93%
From NCERT
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By studying purple sulphur bacteria and green sulphur bacteria, who was the first scientist to demonstrate, in 1931, that photosynthesis is a light-dependent redox reaction in which hydrogen from an oxidizable compound reduces carbon dioxide to cellular materials?
1. Robert Hill
2. C. B. van Neil
3. Arnon
4. Jan Ingenhousz
Subtopic: Historical View: Experiments |
87%
From NCERT
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Consider the given two statements:
| Assertion (A): | C4 plants are more suited to hot climates than C3 plants. |
| Reason(R): | They do not close their stomata in hot, dry weather. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (A) |
| 4. | (A) is False but (R) is True |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
68%
From NCERT
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Consider the given two statements:
| Assertion (A): | The Calvin cycle actually occurs only in the dark or during night time. |
| Reason (R): | The Calvin cycle is also called as ‘Dark’ reactions. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (A) |
| 4. | (A) is False but (R) is True |
Subtopic: Dark Reaction : Calvin Cycle |
80%
From NCERT
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Regarding ATP synthase involved in chemiosmosis in chloroplasts:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The component CF0 is embedded in the thylakoid membrane. |
| II: | The component CF1 protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Chemiosmotic hypothesis |
90%
From NCERT
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Consider the two given statements:
| Assertion (A): | The cyclic flow hence, results only 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) correctly explains (A) |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not explain (A) |
Subtopic: Light Reaction: Photophosphorylation |
86%
From NCERT
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below :
| Statement I: | The primary CO2 acceptor in C4 plants is oxaloacetate and is found in the mesophyll cells |
| Statement II: | Mesophyll cells in C4 plants carry out Calvin cycle. |
| 1. | Statement I is incorrect but Statement II is correct |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is correct but Statement II is incorrect |
Subtopic: C4 Cycle (Hatch & Slack Pathway) |
62%
From NCERT
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Van Niel, based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces CO2 to carbohydrates. This can be expressed by:
Compare this with the correct equation for photosynthesis:
Based on the comparison, which of the following will be correct?
I: In green plants H2O is the hydrogen donor and is oxidised to O2.
II: Some organisms do not release O2 during photosynthesis.
III: O2 evolved by the green plant comes from H2O, not from carbon dioxide.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Compare this with the correct equation for photosynthesis:
Based on the comparison, which of the following will be correct?
I: In green plants H2O is the hydrogen donor and is oxidised to O2.
II: Some organisms do not release O2 during photosynthesis.
III: O2 evolved by the green plant comes from H2O, not from carbon dioxide.
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Introduction | Historical View: Experiments |
77%
From NCERT
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Consider the two statements:
Statement I: Chloroplasts align perpendicular to the walls of mesophyll cells when intensity of light is minimum, to get more and more of light.
Statement II: Chloroplasts align parallel to the walls of mesophyll cells when intensity of light is minimum, to get more and more of light.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Statement I: Chloroplasts align perpendicular to the walls of mesophyll cells when intensity of light is minimum, to get more and more of light.
Statement II: Chloroplasts align parallel to the walls of mesophyll cells when intensity of light is minimum, to get more and more of light.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Chloroplast Structure |
61%
From NCERT
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