Question

10.
In photorespiration, the cell organelles involved
are :
(1) Chloroplast and mitochondrion
(2) Chloroplast only
(3) Chloroplast, mitochondrion and ribosome
(4) Chloroplast and mitochondrion and
peroxisome​

Answer 1

Answer:

chloroplast, mitochondrion and ribosome

Answer 2

Answer:

A

Explanation:

Rubisco is an enzyme used for fixation of carbon dioxide through Calvin cycle. The high concentration of oxygen hinders the Calvin cycle and allows the oxygenation of rubisco and leads to the formation of 2-phosphoglycolic acid which is metabolized by the process of photorespiration into PGA which further enters the Calvin cycle . The process of photorespiration takes place in sequential steps in three major organelles. These are chloroplast, peroxisomes and mitochondria.

So, the correct answer is option A.