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Q. No.Consider the two statements:
Assertion (A):
Higher rate of photosynthesis is seen when plants are provided with blue and red regions
of wavelengths of visible light.
Reason (R):
There is maximum absorption by chlorophyll a in the blue and the red regions of the visible light.
1.
(A) is True but (R) is False
2.
Both (A) and (R) are True and (R) explains (A)
3.
Both (A) and (R) are True but (R) does not explain (A)
4.
Both (A) and (R) are False
of wavelengths of visible light.
Subtopic: Pigments |
91%
From NCERT
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In PS I the reaction centre chlorophyll a has an absorption peak at:
1. 400 nm
2. 430 nm
3. 680 nm
4. 700 nm
1. 400 nm
2. 430 nm
3. 680 nm
4. 700 nm
Subtopic: Light Reaction: Electron Transport |
94%
From NCERT
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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 |
89%
From NCERT
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Consider the two statements:
| Assertion (A): | Cyclic photophosphorylation results only in the synthesis of ATP, but not of NADPH + H+. |
| Reason (R): | Cyclic photophosphorylation occurs only when light of wavelengths beyond 680 nm are available for excitation. |
| 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 but (R) does not correctly explain (A) |
| 4. | Both (A) and (R) are False |
Subtopic: Light Reaction: Electron Transport |
From NCERT
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Consider the two statements:
| Assertion(A): | The protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids. |
| Reason(R): | The primary accepter of electrons, which is located towards the outer side of the membrane, transfers its electron not to an electron carrier but to an H carrier. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) explains (A) |
| 3. | Both (A) and (R) are True but (R) does not explain (A) |
| 4. | Both (A) and (R) are False |
Subtopic: Chemiosmotic hypothesis |
62%
From NCERT
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The ATP synthase enzyme consists of two parts where:
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: | CF0 is embedded in the thylakoid membrane and forms a transmembrane channel that carries out facilitated diffusion of protons across the membrane. |
| II: | CF1 protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma. |
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: Chemiosmotic hypothesis |
94%
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The products of light reaction of photosynthesis include all the following except:
1. ATP
2. NADPH
3. Glucose
4. O2
1. ATP
2. NADPH
3. Glucose
4. O2
Subtopic: WHERE ARE THE ATP AND NADPH USED |
87%
From NCERT
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The radioactive isotope of carbon used by Melvin Calvin to work out the complete biosynthetic pathway in C3 plants was:
1. 11C
2. 12C
3. 13C
4. 14C
1. 11C
2. 12C
3. 13C
4. 14C
Subtopic: WHERE ARE THE ATP AND NADPH USED |
93%
From NCERT
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Consider the two statements:
| Assertion (A): | The primary acceptor of carbon dioxide in C3 plants is a 2-carbon compound. |
| Reason (R): | The first product of carbon dioxide fixation in these plants is a C3 acid. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) explains (A) |
| 3. | Both (A) and (R) are True but (R) does not explain (A) |
| 4. | (A) is False but (R) is True |
Subtopic: WHERE ARE THE ATP AND NADPH USED |
87%
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Subtopic: C4 Cycle (Hatch & Slack Pathway) |
90%
From NCERT
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