During photorespiration, the phosphoglycolate (PGO) produced by RuBP oxygenation is eventually converted to PGA; 75% of the carbon in PGO is recovered. How many molecules of PGO are required to generate two molecules of PGA through this route?
A)five
B)four
C)three
D)two
E)one

Question

Quizplus · Accepted Answer

During photorespiration, two molecules of phosphoglycolate (PGO) are converted into one molecule of 3-phosphoglycerate (PGA) and one molecule of CO2. To generate two molecules of PGA, four molecules of PGO are required, as 75% of the carbon is recovered.

During Photorespiration, the Phosphoglycolate (PGO) Produced by RuBP Oxygenation Is