Identify the statement that is true for C₄ plants but not for C₃ plants?

1. Initially fix carbon dioxide in mesophyll cells as 4-carbon long compounds.

2. Initially fix carbon dioxide in bundle sheath cells as 3-carbon long compounds.

3. Initially fix carbon dioxide in mesophyll cells as 3-carbon long compounds.

4. Initially fix carbon dioxide in bundle sheath cells as 4-carbon long compounds.

Phosphoenol pyruvate (PEP) is the primary CO₂ acceptor in

(1) C₃ -plants 

(2) C₄ -plants

(3) C₂ -plants

(4) C₃ and C₄ -plants

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

(1) Light saturation for CO₂-fixation occurs at 10% of full sunlight.

(2) Increasing atmospheric CO₂ concentration upto 0.05% can enhance the CO₂-fixation rate

(3) C₃ plants respond to higher temperature with enhanced photosynthesis, while C₄ plants have a much lower temperature optimum.

(4) Tomato is a greenhouse crop, which can be grown in a CO₂-enriched atmosphere for higher yield. 

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

The first carbon dioxide fixation product of C₄ plant is 

(1) Oxaloacetic acid

(2) ribulose biphosphate

(3) phosphoenol pyruvate

(4) phosphoglyceric acid.

What is correct about C4 plant?
p. They have special type of leaf anatomy
q. They tolerate high temperature
r. They lack a process called photorespiration
s. Have lesser productivity
t. Show no response to highlight intensities
a. pst
b. qrst
c. prst
d. pqr

What is incorrect about bundle sheath cells-
a. Multilayered
b. large number of chloroplasts
c. Intercellular spaces
d. Thick walls

Hatch and Slack Pathway comes under which category?
a. Cascade
b. Linear
c. Cycle
d. Z- scheme

Where exactly is, the PEP case found?
a. Only Mesophyll cells
b. Bundle Sheath cells
c. both a and b
d. Passage cells

Which C4 compound is transported in Bundle Sheath cell?
1. Malate
2. Aspartate
3. OAA
4. 1 and 2 both