What Is the Purpose of the C4 Pathway

question 59

Multiple Choice

What is the purpose of the C4 pathway?

• A)It is more efficient than the Calvin cycle because less ATP is consumed in the process.
• B)It replaces the carbon fixation stage of the Calvin cycle.
• C)It supplements the activity of rubisco by providing a second source of 3PGA for the reduction stage of the Calvin cycle.
• D)It ensures that CO₂ is provided to rubisco and thus prevents photorespiration.

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