3 Tutorials that teach Glycolysis
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Author: Nathan Lampson
This lesson will introduce the process of glycolysis, and explain how it creates pyruvic acid from glucose.
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In order for cells to get energy they must break down sugar called glucose.  Glycolysis leads to the formation of ATP, a form of available energy used for cellular activity.  

Steps of Glycolysis

2 phosphates are donated to a glucose molecule by 2 ATP molecules

The new 6-carbon sugar diphosphate molecule is split into two 3-carbon sugar phosphate molecules

2 NAD's are reduced and two phosphate groups are added to each 3-carbon sugar phosphate molecule

The phosphates attached to the 3-carbon sugar phosphate molecules are donated to existing ADP molecules in order to form ATP molecules and two 3-carbon pyruvate molecules known as pyruvic acid..

Glycolysis produces a net gain of 2 ATP molecules, 

producing more energy than is required for the process to occur.