​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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