What do cellular respiration and fermentation have in common

They both begin with a series of reactions know as glyclosis, which breaks down glucose molecules into smaller molecules

Answer & explanation:

Both are reactions of energy metabolism in order to obtain energy for other reactions from the breakdown of ATP (adenosine triphosphate).

Cellular respiration and fermentation have the same initial stage: Glycolysis, where the initial breakdown of glucose occurs (reducing glucose to smaller particles) in the energy generation process.

However, in fermentation the glycolysis process is faster because it has a lower energy yield than in cellular respiration.