The photorespiratory carbon-oxidation cycle involves the interaction of

1. chloroplast

2. mitochordria

3. peroxisomes

4. all of these.

Photorespiration in C₃ plants starts from:

(1) phosphoglycerate

(2) phosphoglycolate

(3) Glycerate

(4) glycine.

Hill reaction occurs in:

(1) high altitude plants

(2) total darkness

(3) absence of water

(4) presence of ferricyanide

Which one of the following categories of organisms do not evolve oxygen during photosynthesis?

(1) Red algae

(2) Photosynthetic bacteria

(3) C₄ plants with Kranz anatomy

(4) Blue green algae

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 

(1) 3-phosphoglycerate

(2) 1, 3 biphosphoglycerate

(3) glyceraldehyde - 3 phosphate

(4) ribulose - 5- phosphate

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 

1. sugar but not ATP

2. ATP but not sugar

3. both ATP and sugar

4. neither ATP nor sugar.