C4 cycle is — Plant Pathology MCQ

C4 cycle is

Adjunct to Calvin cycle

Answer

Independent cycle

With high RuBP carboxylase efficiency

With PEP carboxylase ill bundle sheath cells

Answer: Option A

Solution

Answer: Option A

Solution:

The C₄ cycle is an Adjunct to the Calvin cycle.
C₄ carbon fixation is one of three known photosynthetic processes of carbon fixation in plants.
The CO₂ in C₄ cycle is fixed by RuBisCo to produce phosphoglycerate (PGA) while the pyruvate is transported back to the mesophyll cell, together with about half of the phosphoglycerate.
This PGA is chemically reduced in the mesophyll and diffuses back to the bundle sheath where it enters the conversion phase of the Calvin cycle.