Significance of C4 Pathway

Q. The C4 plants are photosynthetically more efficient than C3 plants because

1. They have more chloroplasts
2. The carbon dioxide compensation point is more
3. Carbon dioxide generated during photorespiration is trapped and recycled through PEP carboxylase
4. The carbon dioxide efflux is not prevented

Q.

The alternative pathways of photosynthesis using the C4 or CAM systems are said to be compromises. Why?

1. Each one minimizes both water loss and rate of photosynthesis.

2. C4 compromises on water loss and CAM compromises on photorespiration.

3. CAM plants allow more water loss, while C4 plants allow less CO2 into the plant.

4. Each one both minimizes photorespiration and optimizes the Calvin cycle.

Q.

Which cycle take place in submerged aquatic plants?

Q. Which of the following plants are low carbon dioxide compensation plants i.e. thrive well at even low carbon dioxide concentrations

1. C3- plants
2. C4- plants
3. C2- plants
4. Alpine plants