PS II is not found involved in

1. Non-cyclic photophosphorylation

2. Cyclic photophosphorylation

3. Photolysis of H₂O

4. Formation of NADPH 

The energy required for ATP synthesis in PS II comes from

(1) Proton gradient
(2) Electron gradient
(3) Reduction of glucose
(4) Oxidation of glucose

Select the incorrect statement.

1. Carotenoids protect the plant from excessive heat and prevent photo-oxidation of chlorophyll pigments

2. All pigments other than chlorophyll a are called accessory pigments

3. The electrons removed from PS II are never replaced

4. Cyclic photophosphorylation occurs mostly in stroma lamellae membrane

Identify ‘A’ with respect to ATP synthesis through chemiosmosis.

1. Cytochromes b and f

2. Cytochrome a and a₃

3. Cytochrome bc₁

4. NADP reductase

The reaction centre with respect to cyclic photophosphorylation is

1. P₇₀₀

2. P₆₈₀

3. P₅₄₀

4. P₆₆₀

In C₄ plants, PEP carboxylase and RuBisCO enzymes are present respectively in

1. Stroma and Grana

2. Thylakoid and Stroma

3. Stroma and Stroma

4. Stroma and Cytosol

Cyclic photophosphorylation is different from non-cyclic photophosphorylation as the former

1. Is performed by a collaboration of both PS-II and PS-I

2. Does not require any external source of electrons

3. Is connected with photolysis of water

4. Is connected with ATP and NADPH production

Which of the following statements is incorrect?

(1) RuBisCO is a bifunctional enzyme

(2) In C4 plants, the site of RuBisCO activity is mesophyll cell

(3) The substrate molecule for RuBisCO activity is a 5-carbon compound

(4) RuBisCO action requires ATP and NADPH 

Select the incorrect match from the following

1. One Calvin cycle – Requires 3 ATP and 2 NADPH
2. ${\mathrm{C}}_4$ plant – Shows slower process of carbon fixation
3. ${\mathrm{C}}_3$ plants – 20-25°C is optimum for photosynthesis
4. Hatch and Slack – Primary ${\mathrm{CO}}_2$ acceptor pathway is phosphoenolpyruvate

Mark the odd one (with respect to internal factors affecting photosynthesis)

1. Amount of chlorophyll

2. Light intensity

3. Mesophyll cells

4. Orientation of leaves