How many molecules of glycine is required to release one CO2 molecule in photorespiration?
A
One
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B
Two
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C
Three
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D
Four
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Solution
The correct option is D Two Photorespiration is a wasteful process which occurs due to attachment of oxygen at the active site of enzyme RuBisCO instead of carbon dioxide. Phosphoglycolate is formed in place of 3-phosphoglycerate. It takes place in the chloroplasts, leaf peroxisomes and mitochondria. Two molecules of glycine combine in mitochondria during photorespiration and form serine and release one CO2.