What Is the Purpose of the C₄ Pathway

question 5

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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