9.3 Fermentation

Fermentation = process that releases energy from food molecules in the absence of oxygen Occurs in cytoplasm 2 types – Alcoholic Fermentation Lactic Acid Fermentation

After glycolysis, pyruvic acid enters fermentation process Some organisms  alcoholic fermentation Pyruvate + NADH  Alcohol +CO2 + NAD+ Ex. Yeast, some bacteria

Most organisms  lactic acid fermentation Pyruvate + NADH  lactic acid + NAD+ Ex. Humans, some bacteria

Exercise and Energy Quick energy for short race  ATP in muscles and ATP from lactic acid fermentation Energy for longer race  ATP from cellular respiration (oxidative)