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

Production of NADPH in a chloroplast takes place during

1. cyclic photophosphorylation

2. non-cyclic photophosphorylation

3. series photophosphorylation

4. substrate level photophosphorylation.

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.

The reaction centre with respect to cyclic photophosphorylation is

1. P₇₀₀

2. P₆₈₀

3. P₅₄₀

4. P₆₆₀

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

Non- cyclic photophosphorylation involves –
a. PS-I
b. PS-II
c. PS-I and PS-II
d. PS-I and LHC.

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.

Which of the following statement is incorrect?

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 

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