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Oxidation-Reduction (Redox) Reactions

Practice questions for Oxidation-Reduction (Redox) Reactions in the HESI A2 exam.

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During a redox reaction in a biological system, NAD⁺ is converted to NADH. What role does NAD⁺ play in this reaction?

B. Reducing agent; it loses electrons
C. Catalyst; it remains unchanged
D. Base; it donates a proton
A. Oxidizing agent; it gains electrons