Question

During glycolysis, glucose is broken down into two molecules of pyruvate.
A diagram shows the conversion of a glucose molecule to 2 pyruvic acid molecules. In this process, 2 A T P form 2 A D P, 2 N A D produce 2 N A D H, and 4 A D P produce 4 A T P.
What is the main transformation that occurs during glycolysis?
Glycolysis produces ATP and pyruvate by oxidizing water.
Glycolysis produces ATP and pyruvate by oxidizing glucose and NAD+.
Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose.
Glycolysis produces CO2, ATP, and pyruvate by reducing glucose.

Answer 1

Correct answer: "Glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose."

Brief explanation: Glucose is partially oxidized to two molecules of pyruvate, electrons are transferred to NAD+ (forming NADH), and substrate-level phosphorylation generates ATP (net 2 ATP per glucose). Glycolysis does not release CO2 and does not oxidize NAD+.