Multiple choice

Under which condition can C3 cycle not operate in plants?

  1. High CO2

  2. Absence of oxygen

  3. High CO2 and absence of oxygen

  4. Low CO2 and presence of oxygen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

C3 cycle cannot operate under very low CO2 conditions and oxygen has inhibitory effect on photosynthesis. Thus, C3 cycle cannot operate in presence of oxygen.

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