Question

select all that apply. which happen during the preparatory reaction? citric acid is broken down three - carbon pyruvate reacts with coenzyme a nad+ is converted to nadh carbon dioxide is given off by the cell

Explanation:

In the preparatory reaction of cellular respiration, pyruvate (a three - carbon molecule) reacts with coenzyme A. During this process, carbon dioxide is released and NAD+ is reduced to NADH. The citric acid cycle occurs after the preparatory reaction.

Answer:

• three - carbon pyruvate reacts with coenzyme A
• NAD+ is converted to NADH
• carbon dioxide is given off by the cell