Q. No.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
1. 1
2. 2
3. 3
4. 4
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. |
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.
Where does cyclic photo-phosphorylation takes place?
a. membranous system of chloroplast
b. stroma lamellae
c. grana
d. stroma
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.
Which of the following statement is correct?
| 1. | H2S is the hydrogen donor for purple and green sulphur bacteria. |
| 2. | H2O is the hydrogen donor for purple and green sulphur bacteria. |
| 3. | Oxygen is evolved by the purple and green sulphur bacteria. |
| 4. | Oxygen evolved by the green plants comes from CO2. |
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
What does not cause the proton gradient across the membrane?
a. Splitting of water
b. Moving electrons through photosystems
c. Reduction of NADP
d. Q cycle
What does chemiosmosis require?
| 1. | membrane, cytosol, proton pump, ATPase, and proton gradient |
| 2. | membrane, cytosol, proton pump, and H-ions |
| 3. | membrane, protonpump, ATPase and proton gradient |
| 4. | membrane, cytosol, proton pump, ATPase and proton gradient, and H-ions |
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