In Cacti, CO₂ Is Fixed During the Night in a Four-Carbon

question 145

Multiple Choice

In cacti, CO₂ is fixed during the night in a four-carbon molecule and stored in _______ for use in the Calvin cycle during the day.

• A) the stems, roots, and leaves
• B) the vacuoles of mesophyll cells
• C) sugar molecules
• D) the stroma
• E) the thylakoid lumen

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