Multiple Choice
In the glycolytic pathway, what is the initial substrate molecule that enters glycolysis?
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Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Glycolysis 1
Multiple Choice
In cellular metabolism, what is the overall function of glycolysis?
A
To convert two molecules of pyruvate into one molecule of glucose while consuming ATP and NADH
B
To oxidize acetyl-CoA to and produce most of the cell’s NADH in the mitochondrion
C
To convert one molecule of glucose into two molecules of pyruvate while generating ATP and NADH
D
To use oxygen as the terminal electron acceptor to drive ATP synthesis by oxidative phosphorylation
Verified step by step guidance1
Understand that glycolysis is a metabolic pathway that breaks down glucose, a six-carbon sugar, into smaller molecules to release energy.
Recognize that the primary substrate for glycolysis is one molecule of glucose, and the pathway converts it into two molecules of pyruvate, each containing three carbons.
Note that during this conversion, glycolysis generates energy in the form of ATP (adenosine triphosphate) and reduces NAD+ to NADH, which are important for cellular energy and redox balance.
Distinguish glycolysis from other metabolic processes such as gluconeogenesis (which synthesizes glucose from pyruvate), the citric acid cycle (which oxidizes acetyl-CoA), and oxidative phosphorylation (which uses oxygen to produce ATP).
Summarize that the overall function of glycolysis is to convert one molecule of glucose into two molecules of pyruvate while producing ATP and NADH, providing energy and metabolic intermediates for the cell.
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