Questions

For each RuBP involved in dark reaction, the formation of 3-phosphoglyceric acid molecules is decreased to half when there is operation of the following pathway.

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C3 pathway

C4 pathway

CAM pathway

Photorespiration

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detailed solution

Correct option is D

During photorespiration, O2 reacts with RuBP to produce one molecule of PGA and one molecule of phosphoglycolate (2C). This phosphogylcolate utilizes ATP and undergoes several reactions in organelles like chloroplast, mitochondria and peroxisomes to finally get converted into a molecule of PGA. In C3, C4 and CAM pathways for each RuBP involved, there is formation of 2 molecules of 3-phosphoglyceric acid.

Similar Questions

Read the following statements on photorespiration and state them as true (T) or false (F).
(A) Oxidation of RuBP in the stroma of chloroplast in bright light and high oxygen.
(B) Does not utilise ATP and reducing power.
(C) Results in the release of ${CO}_{2}$ with the utilisation of energy.
(D) The biological function of photorespiration is not yet known.