Which regions of the visible spectrum are responsible for most of the photosynthesis?
1. blue and yellow
2. blue and red
3. blue and green
4. green and red

 

Subtopic:  Photosynthetic Pigments |
 89%
From NCERT
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How statements are correct?
i. chlorophyll-a , xanthophylls and carotenoids are called as accessory pigments.
ii. accessory pigments protect chlorophyll-a from photo-oxidation.
iii.chlorophylla are the major pigments responsible for trapping of light
iv. chl-a and chl-b forms the reaction centre
v. chl-a transfers the energy to accessory pigments.
1. 2
2. 3
3. 4
4. 5

Subtopic:  Photosynthetic Pigments |
 68%
From NCERT
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Photochemical phase does not include-
1. water splitting
2. oxygen release
3. CO2 assimilation
4. light absorption

Subtopic:  Light Reactions |
 86%
From NCERT
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Which of the following statement is incorrect?
1. Reaction centre is formed by a group of chl- a molecules.
2. Reaction centre is different in both the photosystems.
3. In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm.
4. In PS II the reaction centre chlorophyll a has absorption maxima at 680 nm.

 

Subtopic:  Photosystems |
 65%
From NCERT
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In photosystem-I, P700 refers to-
1. chl-b
2. chl-a
3. number of pigment molecules
4. absorption peak of chl-a at 700nm

Subtopic:  Photosystems |
 87%
From NCERT
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Light harvesting complexes are made up of-
1. proteins
2. pigments
3. protein and pigments
4. proteins and lipids.

Subtopic:  Photosystems |
 77%
From NCERT
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In chloroplast the movement of electrons from PS-II to electron transport system is-
1. uphill in terms of redox potential scale.
2. downhill in terms of redox potential scale.
3. from one cytochrome to another
4. None of the above.

Subtopic:  Light Reaction: Electron Transport |
 65%
From NCERT
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Electrons in the reaction center of PS-I are excited by-
1. blue light
2. red light
3. green light
4. blue and red light

Subtopic:  Photosystems |
 59%
From NCERT
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Non- cyclic photophosphorylation involves –
1. PS-I
2. PS-II
3. PS-I and PS-II
4. PS-I and LHC

Subtopic:  Light Reaction: Photophosphorylation |
 84%
From NCERT
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Where does cyclic photo-phosphorylation takes place?
1. membranous system of chloroplast
2. stroma lamellae
3. grana
4. stroma

Subtopic:  Light Reaction: Photophosphorylation |
 79%
From NCERT
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