Multiple Choice
In eukaryotic cells, where does glycolysis primarily occur?
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Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Glycolysis 1
Multiple Choice
During glycolysis, one molecule of glucose is broken down into which of the following products?
A
Two molecules of glyceraldehyde-3-phosphate
B
Two molecules of pyruvate
C
Two molecules of lactate
D
Two molecules of acetyl-CoA
Verified step by step guidance1
Recall the overall process of glycolysis, which is the metabolic pathway that breaks down one molecule of glucose (a 6-carbon sugar) into smaller molecules to extract energy.
Understand that glycolysis consists of two main phases: the preparatory phase, where glucose is converted into two molecules of glyceraldehyde-3-phosphate (G3P), and the payoff phase, where these G3P molecules are further processed.
Recognize that the final products of glycolysis are two molecules of pyruvate, each containing 3 carbons, formed after the conversion of glyceraldehyde-3-phosphate through a series of enzymatic steps.
Note that lactate is produced from pyruvate only under anaerobic conditions (fermentation), and acetyl-CoA is formed after pyruvate enters the mitochondria and undergoes oxidative decarboxylation, which is a separate process from glycolysis.
Therefore, the correct answer is that glycolysis breaks down one molecule of glucose into two molecules of pyruvate.
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