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Q. No.Given below are two statements:
Assertion (A):
Carboxylation is the most crucial step of Calvin cycle.
Reason (R):
This reaction is catalysed by the enzyme RuBP carboxylase which results in the formation of two molecules of 3-PGA
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are false.
Subtopic: Dark Reaction : Calvin Cycle |
63%
From NCERT
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Which reagent can be used to determine the essentiality of CO2 for the process of photosynthesis.
1. KOH
2. K2Cr2O7
3. Starch
4. Iodine tincture
1. KOH
2. K2Cr2O7
3. Starch
4. Iodine tincture
Subtopic: Historical View: Experiments |
90%
From NCERT
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Identify the incorrectly matched pair w.r.t. the experimental material used by the scientist.
1. Joseph Priestley - Neem Plant
2. Jan Ingenhousz - Aquatic plant
3. TW Engelmann - Cladophora
4. Cornelius van Niel - Purple & green bacteria
1. Joseph Priestley - Neem Plant
2. Jan Ingenhousz - Aquatic plant
3. TW Engelmann - Cladophora
4. Cornelius van Niel - Purple & green bacteria
Subtopic: Historical View: Experiments |
87%
From NCERT
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Which of the following scientists discovered oxygen?
1. Joseph Priestley
2. Jan Ingenhousez
3. Cornelius van Niel
4. T.W. Engelmann
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%
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: Pigments |
82%
From NCERT
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