# Cellular respiration uses 1 molecule of glucose to produce approximately how many ATP molecules?

Dec 6, 2017

Here's a figure from my general biology text,

If you need more detail:

Glucose undergoes glycolysis, uses $2 A T P$ and produces $4 A T P$ through various biochemical reactions which I don't want to give you a headache explaining.

From there, 2 pyruvate molecules undergo processing: the remaining acetyl unit interacts with coenzyme A to produce the beginning molecules for the feared and infamous Krebs cycle.

This is where I'll just tell you eventually all of these electron acceptors (e.g. $N A D H$, and $F A D {H}_{2}$) fuel an electron-transport chain and produce approximately $29 A T P$ per glucose monomer.

Theoretically we should get somewhere near $40$, but some fun biochemistry occurs that prevents this from happening.