Multiple Choice
A small amount of is made in glycolysis by which of the following processes?
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33. The Organic Chemistry of Metabolic Pathways
Glycolysis Summary
Multiple Choice
What is the net result of the breakdown of in glycolysis and fermentation?
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Verified step by step guidance1
Understand that glycolysis is the process of breaking down one molecule of glucose (C₆H₁₂O₆) into two molecules of pyruvate (C₃H₄O₃), producing a net gain of ATP and NADH.
In glycolysis, two ATP molecules are used in the initial steps, and four ATP molecules are produced in later steps, resulting in a net gain of 2 ATP molecules.
Additionally, glycolysis produces 2 NADH molecules as it converts glucose to pyruvate.
Fermentation occurs in the absence of oxygen and allows cells to regenerate NAD⁺ from NADH, enabling glycolysis to continue. Depending on the organism, fermentation can produce different end products.
In lactic acid fermentation, pyruvate is reduced to lactate, regenerating NAD⁺. In alcoholic fermentation, pyruvate is converted to ethanol and carbon dioxide, also regenerating NAD⁺. Consider these pathways to determine the net products of glycolysis and fermentation.
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