`RUBP + O_(2) overset(RUBSICO)to "Phosphoglycolate" + PGA` .
The above equation represent the first step of a cyclic pathways occuring in plants cells .
(a)Name the pathways.
(b) Where does this pathways occurs inside the cell ?
(c) How many carbon molecules are seen in RUBP & PGA.
(d) State the role of RUBISCO in this step .
(e) Under which condition does this pathway proceed.

Explanation

(a) Photorespiration or `C_(2)` cycle.
(b) `C_(2)` cycle takes place in chloroplast , peroxisome and mitochondriom.
(c) RUBP is a 5C compound and PGA is a 3C compoud .
(d) RUBISCO plays the role of oxygenase enzyme .
(e) `C_(2)` cycle occurs in photosynthetic cells due to abssence of `CO_(2)` and increased `O_(2)`.