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​Why Is Photorespiration an Inefficient Way to Produce Sugars

Question 6

Multiple Choice

​Why is photorespiration an inefficient way to produce sugars?


A) ​Photorespiration produces 7-carbon carbohydrate molecules instead of 6-carbon sugars.
B) ​The increased production of O2 during photorespiration generates excess dangerous free radicals.
C) ​Photorespiration only occurs during the night, when the light-dependent reactions are inactive.
D) ​CO2 is lost instead of being fixed and ATP is required to detoxify the ammonia that is produced.
E) ​Carbon fixation requires an extra turn of the Calvin-Benson cycle for each molecule of sugar produced.

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