The C₄ plants grow very efficiently in warm climates because they

1.	consume fewer ATP molecules for glucose synthesis
2.	minimize photorespiratory losses
3.	have more efficient chloroplasts
4.	contain enzymes which are not inactivated at high temperatures.

Following is needed in the ionic form during non-cyclic photophosphorylation but not during cyclic photophosphorylations in higher plants. 

Production of NADPH in a chloroplast takes place during

1. cyclic photophosphorylation

2. non-cyclic photophosphorylation

3. series photophosphorylation

4. substrate level photophosphorylation.

The photoautotrophic organisms that do not split water to obtain reducing power are 

Dark reaction occurs

Photorespiration, usually occurs in

Which of the following statements about phytochrome is true?

Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Who discovered photophosphorylation?

1. Arnon et. al.

2. Von Mayer

3. Clavin et.al.

4. Hill

Photosynthetic bacteria do not contain