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Q. No.Which of the following scientists discovered oxygen?
1. Joseph Priestley
2. Jan Ingenhousez
3. Cornelius van Niel
4. T.W. Engelmann
Subtopic: Historical View: Experiments |
87%
From NCERT
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In the experiment conducted by T.W. Engelmann aerobic bacteria were used.
| 1. | To determine the action spectrum |
| 2. | To determine the absorption spectrum of chlorophyll. |
| 3. | To detect the sites of oxygen (O2) evolution. |
| 4. | To detect the oxidizing species in the photosynthetic reactants. |
Subtopic: Historical View: Experiments |
From NCERT
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Which alignment of chloroplasts in mesophyll cell will allow to get optimum quantity of the incident light?
1. Away from the wall
2. Across the wall
3. Along the wall
4. Perpendicular to the wall
1. Away from the wall
2. Across the wall
3. Along the wall
4. Perpendicular to the wall
Subtopic: Chloroplast Structure |
70%
From NCERT
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The fluid component of chloroplast associated with
1. Photochemical reactions
2. Light - dependent reactions
3. ATP - synthesizing reactions
4. Biosynthetic reactions
1. Photochemical reactions
2. Light - dependent reactions
3. ATP - synthesizing reactions
4. Biosynthetic reactions
Subtopic: Chloroplast Structure |
53%
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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: Pigments |
61%
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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: Pigments |
83%
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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: Pigments |
82%
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: 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: Light Reaction: Electron Transport |
82%
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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: Light Reaction: Electron Transport |
68%
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