Multiple Choice
In a eukaryotic cell, glycolysis primarily takes place in which cellular compartment?
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Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Glycolysis 1
Multiple Choice
In glycolysis (per 1 molecule of glucose), what is the primary end product carbon compound formed at the end of the pathway under aerobic conditions?
A
Two molecules of lactate
B
Two molecules of acetyl-CoA
C
One molecule of citrate
D
Two molecules of pyruvate
Verified step by step guidance1
Recall that glycolysis is the metabolic pathway that breaks down one molecule of glucose (a 6-carbon sugar) into two molecules of a 3-carbon compound.
Under aerobic conditions, glycolysis ends with the formation of two molecules of pyruvate, each containing 3 carbons, before entering the mitochondria for further oxidation.
Understand that lactate is produced from pyruvate only under anaerobic conditions (lack of oxygen), through the action of lactate dehydrogenase.
Recognize that acetyl-CoA and citrate are intermediates formed after pyruvate enters the mitochondria and undergoes further processing in the citric acid cycle, not directly at the end of glycolysis.
Therefore, the primary carbon-containing end product of glycolysis per glucose molecule under aerobic conditions is two molecules of pyruvate.
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