ATP synthesis is linked to-
1. Development of electron gradient
2. Development of atomic gradient
3. Development of proton gradient
4. Flow of electrons across the membrane

Subtopic:  Light Reactions :3 | Light Reactions |
 87%
From NCERT
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Production of NADPH in a chloroplast takes place during

1. cyclic photophosphorylation

2. non-cyclic photophosphorylation

3. series photophosphorylation

4. substrate level photophosphorylation.

Subtopic:  Light Reactions :2 | Light Reactions |
 87%
From NCERT
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Synthesis of ATP from ADP and inorganic phosphate in the presence of light is known as-
a. phosphorylation
b. photo-phosphorylation
c. photorespiration
d. photooxidation.

Subtopic:  Light Reactions :3 | Light Reactions |
 88%
From NCERT
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The reaction centre with respect to cyclic photophosphorylation is

1. P700

2. P680

3. P540

4. P660

Subtopic:  Light Reactions |
 88%
From NCERT
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In the Z-scheme of light reaction, at how many positions an electron is excited by the light?
1. 1
2. 2
3. 3
4. 4

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
 82%
From NCERT
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Non- cyclic photophosphorylation involves –
a. PS-I
b. PS-II
c. PS-I and PS-II
d. PS-I and LHC.

Subtopic:  Light Reactions :3 | Light Reactions |
 85%
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:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
 80%
From NCERT
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Which of the following statement is incorrect?

1. Electrons to PS-I are provided by PS-II
2. Electrons to PS-II are provided by the splitting of water
3. Electrons to PS-I are provided by the splitting of water
4. PS-II is physically located on the inner side of the membrane of the thylakoid.
Subtopic:  Light Reactions :3 | Light Reactions |
 80%
From NCERT
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The C4 plants differ from C3 plants with reference to the: 

1. substrate that accepts CO2 in carbon assimilation

2. type of end product

3. type of pigment involved in photosynthesis

4. end product that will be formed 

Subtopic:  Dark Reaction: Biosynthetic Phase | Light Reactions :1 | Light Reactions |
 81%
From NCERT
AIIMS - 2014
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Which of the following is incorrect about the light reactions of photosynthesis?

1. P680 and P700 are the reaction centres of PS-I and PS-II respectively

2. Light energy provides energy for the photolysis of water through excitation of the reaction centre of PS-II

3. NADPH is not produced in cyclic electrons transport in light reactions

4. Reactions of the two photosystems are needed for the reduction of NADP

Subtopic:  Light Reactions :3 | Light Reactions |
 82%
From NCERT
AIIMS - 2016
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