During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?

Glycolysis is a stage of cellular respiration where glucose is broken down into two molecules of pyruvic acid.

Explanation:

because of sccience

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products