Question

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

Answer 1

I hope this helps:

"Glycolysis: Glucose ( 6 carbon atoms) is split into 2 molecules of pyruvic acid (3 carbons each). This produces 2 ATP and 2 NADH. Glycolysis takes place in the cytoplasm."

This is Glycolysis

Answer 2

Link: https://web.fscj.edu/David.Byres/1005anotes/ch4notes.html#:~:text=Glycolysis%3A,takes%20place%20in%20the%20cytoplasm.