During the Calvin-Benson Cycle (Carbon-Fixing Reactions), in the Red Columbine

question 18

Multiple Choice

During the Calvin-Benson cycle (carbon-fixing reactions) , in the red Columbine plant, high-energy electrons are transferred into a newly made 3-carbon compound. Eventually these electrons will end up as part of glucose molecules. What was the original source of these electrons in photosynthesis?

• A)glucose
• B)ATP
• C)oxygen
• D)water
• E)carbon dioxide

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