4.6 Fermentation

KEY CONCEPT Fermentation occurs in place of cellular respiration when oxygen is NOT present.

4.6 Fermentation

Fermentation allows glycolysis to continue.

• Fermentation is an anaerobic process.– occurs when oxygen is not available for cellular

respiration– does not produce ATP, but allows glycolysis to

continue so it can make a small amount of ATP.

4.6 Fermentation

• Lactic acid fermentation occurs in muscle cells.– glycolysis splits glucose into two pyruvate molecules– pyruvate is converted into lactic acid– Lactic acid causes soreness in muscles

There are two types of fermentation: Lactic Acid and Alcoholic

4.6 Fermentation

• Alcoholic fermentation is similar to lactic acid fermentation.– glycolysis splits glucose into two pyruvate molecules

– pyruvate is converted into alcohol and carbon dioxide– alcoholic fermentation takes place in yeast and some

plants

4.6 Fermentation

• Fermentation is used in food production.

– yogurt

– cheese

– bread