The molecular formula of chl.b is:
1. C55H70O6N4Mg
2. C55H72O5N4Mg
3. C55H70O5N4Mg
4. C54H70O6N4Mg
Subtopic: Â Pigments |
 65%
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T.W Engelmann:
I: described first absorption spectrum of photosynthesis.
II: first showed that it is only the green part of the plants that could release oxygen.
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: described first absorption spectrum of photosynthesis.
II: first showed that it is only the green part of the plants that could release oxygen.
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: Â Historical View: Experiments |
From NCERT
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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
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: Â Chloroplast Structure |
 88%
From NCERT
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A chromatographic separation of the leaf pigments shows that the colour that we see in leaves is not due to a single pigment but due to four pigments. The colours bright or blue green in the chromatogram are associated with:
1. Chlorophyll a
2. Chlorophyll b
3. Xanthophylls
4. Carotenoids
1. Chlorophyll a
2. Chlorophyll b
3. Xanthophylls
4. Carotenoids
Subtopic: Â Pigments |
 93%
From NCERT
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Consider the two statements:
Assertion: Higher rate of photosynthesis is seen when plants are provided with blue and red regions
of wavelengths of visible light.
Reason: There is maximum absorption by chlorophyll a in the blue and the red regions of the visible light.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Both Assertion and Reason are false
Assertion: Higher rate of photosynthesis is seen when plants are provided with blue and red regions
of wavelengths of visible light.
Reason: There is maximum absorption by chlorophyll a in the blue and the red regions of the visible light.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Both Assertion and Reason are false
Subtopic: Â 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: Â 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: Â Light Reaction: Electron Transport |
 90%
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: Â Light Reaction: Electron Transport |
From NCERT
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Consider the two statements:
Assertion: The protons or hydrogen ions that are produced by the splitting of water accumulate
within the lumen of the thylakoids.
Reason: The primary accepter of electron which is located towards the outer side of the membrane
transfers its electron not to an electron carrier but to an H carrier.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Both Assertion and Reason are false
Assertion: The protons or hydrogen ions that are produced by the splitting of water accumulate
within the lumen of the thylakoids.
Reason: The primary accepter of electron which is located towards the outer side of the membrane
transfers its electron not to an electron carrier but to an H carrier.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Both Assertion and Reason are false
Subtopic: Â Chemiosmotic hypothesis |
 62%
From NCERT
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The ATP synthase enzyme consists of two parts where:
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
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: Â Chemiosmotic hypothesis |
 94%
From NCERT
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