In chloroplast the movement of electrons from PS-II to electron transport system is-
a. uphill in terms of redox potential scale.
b. downhill in terms of redox potential scale.
c. from one cytochrome to another
d. None of the above.

Subtopic:  Light Reactions :2 | Light Reactions :3 | Light Reactions |
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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 |
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Final acceptor in the Z-scheme of light reaction-
a. oxygen
b. NADPH
c. NADP+
d. ferredoxin

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
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In the Z-scheme of light reaction, at how many positions an electron is excited by the light?
a. 1
b. 2
c. 3
d. 4

Subtopic:  Light Reactions :1 | Light Reactions :2 | Light Reactions |
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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 |
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Which of the following statement is incorrect?
a. Electrons to PS-I are provided by PS-II
b. Electrons to PS-II are provided by splitting of water
c. Electrons to PS-I are provided by splitting of water
d. PS-II is physically located on the inner side of the membrane of thylakoid.

Subtopic:  Light Reactions :3 | Light Reactions |
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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 |
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In plant cells ATP is synthesised in-
a. mitochondria
b. chloroplast
c. mitochondria and chloroplast
d. in mitochondria during day and in chloroplasts during night.

Subtopic:  Light Reactions :3 | Light Reactions |
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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 |
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Where does cyclic photo-phosphorylation takes place?
a. membranous system of chloroplast
b. stroma lamellae
c. grana
d. stroma

Subtopic:  Light Reactions :3 | Light Reactions |
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