Which of the following is the characteristic of PS-I?

1.	It is activate only upto 680 nm of light.
2.	The reaction centre of PS-I is P680 .
3.	PS-I is reduced by the electrons released in photolysis of water.
4.	PS-I is involved in non-cyclic photophosphorylation.

Cyclic photophosphorylation invloves

(1) PS I

(2) PS II

(3) PS I and PS II

(4) P₆₈₀

The first stable product of Calvin cycle is 

PS-II occurs only in

(1) stroma

(2) granal thylakoids

(3) stromal lamella

(4) matrix

Which of the following statements is correct?

Photorespiration shows formation of 

Kranz anatomy is usually associated with 

C₄ plants have better productivity because 

The first carbon dioxide fixation product of C₄ plant is 

(1) Oxaloacetic acid

(2) ribulose biphosphate

(3) phosphoenol pyruvate

(4) phosphoglyceric acid.

Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is 

1. calcium oxide

2. distilled water

3. potassium hydroxide solution

4. sodium carbonate.