The fluid component of chloroplast associated with
1. Photochemical reactions
2. Light - dependent reactions
3. ATP - synthesizing reactions
4. Biosynthetic reactions
Subtopic: Â Chloroplast Structure |
 51%
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Which of the following effects will be observed if the plant is exposed only to red light which was earlier given blue light?
| 1. | Increase in rate of photosynthesis |
| 2. | Decrease in rate of photosynthesis |
| 3. | Firstly, decrease in rate of photosynthesis then increase |
| 4. | No photosynthesis takes place |
Subtopic: Â Pigments |
 62%
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Which of the following is true about chlorophyll b?
| 1. | Serves as major primary pigment in the photosynthetic machinery |
| 2. | Forms the reaction center only |
| 3. | Prevent reaction center from photo-oxidation |
| 4. | Show blue color in chromatogram |
Subtopic: Â Pigments |
 82%
From NCERT
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Which of the following biomolecules serve as the binding site of pigments in light harvesting (LHC)?
1. Nucleic acids
2. Proteins
3. Carbohydrates
4. Vitamins
1. Nucleic acids
2. Proteins
3. Carbohydrates
4. Vitamins
Subtopic: Â Pigments |
 81%
From NCERT
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Absorption peak of carotenoids in PS II falls in:
1. Red region
2. Green region
3. Yellow region
4. Blue region
1. Red region
2. Green region
3. Yellow region
4. Blue region
Subtopic: Â Pigments |
From NCERT
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In terms of redox potential, flow of electrons from LHC to electron acceptor is A and within electron transport systems is B. Select correct option to fill (A) & (B)
| (A) | (B) | |
| 1. | Uphill | Downhill |
| 2. | Downhill | Uphill |
| 3. | Downhill | Downhill |
| 4. | Uphill | Uphill |
Subtopic: Â Light Reaction: Electron Transport |
 82%
From NCERT
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Electron transport system is composed of:
1. Reduced coenzymes
2. Redox enzymes
3. Cytochomes
4. Fatty acids
1. Reduced coenzymes
2. Redox enzymes
3. Cytochomes
4. Fatty acids
Subtopic: Â Light Reaction: Electron Transport |
 68%
From NCERT
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In which of the following locations, water splitting complex can be localized?
1. Outer side of thylakoid membrane
2. Embedded in the thylakoid membrane
3. Lumen of thylakoid
4. Inner side of thylakoid membrane
1. Outer side of thylakoid membrane
2. Embedded in the thylakoid membrane
3. Lumen of thylakoid
4. Inner side of thylakoid membrane
Subtopic: Â Light Reaction: Electron Transport |
 68%
From NCERT
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How many oxygen (O2) molecules will be evolved from stroma lamellae if 20 water molecules are available?
1. 20
2. zero
3. 10
4. 40
1. 20
2. zero
3. 10
4. 40
Subtopic: Â Light Reaction: Photophosphorylation |
From NCERT
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A plant is irradiated with light having wavelengths greater than 680 nm. How many electrons will be generated by water splitting complex in thylakoid, if 20 molecules of water are available?
1. Zero
2. 20
3. 10
4. 40
1. Zero
2. 20
3. 10
4. 40
Subtopic: Â Chemiosmotic hypothesis |
 58%
From NCERT
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