CO₂ is utilized for the carboxylation of RuBP inside the bundle sheath cells of

1. Maize, Sorghum

2. Tomato, Bell pepper

3. Cacti, Sedum

4. Rice, wheat

Which of the following are special features of the C₄ plants?

1. Only I and II

2. Only I and III

3. Only II and III

4. I, II and III

Crops such as tomatoes and bell pepper, allowed to grow in a carbon dioxide rich environment, show higher yields because:

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?

(1) C₄

(2) CAM

(3) Nitrogen-fixer

(4) C₃

C₄ plants have better productivity because 

(1) C₄ plants absorb more light

(2) C₄ plants absorb more CO₂

(3) C₄ plants does not carry photorespiration

(4) C₄ plants have more amount of RuBisCO.

In the C4 pathway, which of the following molecules combines with carbon dioxide?

1. glyceraldehyde phosphate

2. ribulose biphosphate

3. phosphoenol pyruvic acid

4. citric acid

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

(3) contain enzymes which are not inactivated at high temperatures.