Respiration is the cellular process of releasing energy from food. Aerobic respiration releases fifteen times more energy than fermentation.

He prepared cell-free extracts by carefully grinding ... into pyruvate — is the first major step of fermentation or respiration in cells. It is an ancient metabolic pathway that probably ...

Cells require energy for activities such as growth and cell ... then respiration can still take place. Animal, plant and yeast cells complete the breakdown of food by carrying out fermentation.