Hi there,
I hope you and your family are staying safe and healthy!
The answer is: Acetyl - CoA
So basically Glycolysis is the process by which glucose is broken down within the cytoplasm of a cell to form pyruvate. Then under aerobic conditions, pyruvate can diffuse into Mitochondria and then convert to Acetyl-CoA as aerobic metabolism continue.
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Happy to help!
~Garebear