The C₄cycle ____

question 22

Multiple Choice

The C₄cycle ____.

• A) replaces the second stage of the Calvin cycle
• B) supplements the activity of rubisco by providing a second source of 3PGA for the reduction stage of the Calvin cycle
• C) is more efficient than the Calvin cycle because less ATP is consumed in the process
• D) ensures that CO₂is provided to rubisco and thus prevents photorespiration
• E) is most commonly associated with plants living in humid climates

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