1. The place where cyclic flaw of electrons occur:
a) Thylakoid of grana
b) Stroma
c) Stroma lamellae
d) All of theses
Explanation: Stroma lamellae
2. Stroma lamellae lacks all except
a) PS II
b) NADP reductase
c) PS I
d) Water splitting complex
Explanation: Stroma lamellae lacks all except PS I
3. Which of the following is incorrect about cyclic photophosphorylation?
a) Only PS I is involved.
b) It occurs only when light of wavelength beyond 680 nm is available for excitation.
c) Only synthesis of ATP occurs.
d) Synthesis of NADPH \[+H^{+}\] occurs.
Explanation: "Synthesis of NADPH \[+H^{+}\] occurs". This is incorrect.
4. What is the processes that creates proton gradient across thylakoid membrane?
a) Splitting of water molecule on inner side of membrane (towards lumen).
b) \[H^{+}\] carrier transport \[H^{+}\] ion from stroma to lumen.
c) NADH reductase removes \[H^{+}\] ion from stroma for reduction of NADP+.
d) All the above
Explanation: All the above
5.During light reaction
a) pH of stroma ↓es
b) pH of lumen ↑es
c) pH of lumen ↓es
d) pH of stroma has no effect
Explanation: pH of lumen ↓es
6. Which acts as a transmembrane channel?
a) \[F_{0}\] of ATPase
b) \[F_{1}\] of ATPase
c) Both (a) and (b)
d) None of theses
Explanation: \[F_{0}\] of ATPase
7. Chemiosmosis requires
a) Membrane
b) Proton pump
c) Proton gradient
d) All of these
Explanation: All of these
8. Which type of phosphorylation takes place in photosynthesis?
a) Cyclic
b) Non-cyclic
c) Both (a) and (b)
d) None of theses
Explanation: Both (a) and (b)
9. Unidirectional flow of electrons in photophosphorylation takes place in
a) Cyclic
b) Non-cyclic
c) Pseudocyclic
d) All of theses
Explanation: Non-cyclic
10. In light reaction of photosynthesis, the chlorophyll is subjected to
a) Destruction
b) Permanent reduction
c) Oxidation and reduction
d) Neutralization
Explanation: Permanent reduction