Which of the following statement is incorrect?
a. Reaction centre is formed by a group of chl- a molecules.
b. Reaction centre is different in both the photosystems.
c. In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm.
d. In PS II the reaction centre chlorophyll a has absorption maxima at 680 nm.

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
 60%
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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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Light harvesting complexes are made up of-
1. proteins
2. pigments
3. protein and pigments
4. proteins and lipids.

Subtopic:  Light Reactions :1 | Light Reactions |
 73%
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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 Reactions :2 | Light Reactions :3 | Light Reactions |
 61%
From NCERT
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Electrons in the reaction center of PS-I are excited by-
a. blue light
b. red light
c. green light
d. blue and red light.

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
 50%
From NCERT
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Final acceptor in the Z-scheme of light reaction-
1. oxygen
2. NADPH
3. NADP+
4. ferredoxin

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
 68%
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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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Spliting of water is associated with-
a. PS II
b. PS I
c. PS I AND PS II
d. outer membrane of thylakoid.

Subtopic:  Light Reactions :3 | Light Reactions |
 86%
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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%
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Where are the protons and oxygen produced by the splitting of water likely to be released?
a. in the lumen of thylakoid
b. on the outer side of the membrane
c. Both a and b
d. used up in the light reaction

Subtopic:  Light Reactions :3 | Light Reactions |
 59%
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