1. 5.5 Glycolysis and Fermentation
Unit 5: Cell Energy
5.5 Glycolysis and Fermentation

2. Glycolysis
First set of reactions in cellular respiration in which a molecule of glucose is broken down into two molecules of pyruvic acid.
Literally means “sugar breaking”
As sugar bonds are broken, energy is released

3. Summary
Takes place in the cytoplasm

4. Summary
Anaerobic

5. Summary Requires 2 ATP to begin process
Starts with a glucose (6 carbon molecule) and produces 2 pyruvate/pyruvic acid (3 carbon molecule), 2 NADH and 4 ATP
There is a NET GAIN of 2 ATP

8. Draw this one! Glucose 2 Pyruvic Acid To Krebs Cycle ATP NADH ADP X 2
To Electron
Transport Chain

9. If no oxygen is present after glycolysis, fermentation occurs

10. Fermentation
Produces ATP without oxygen; occurs in the cytosol/cytoplasm within the cell
There are two types of fermentation:
Alcoholic Fermentation
Lactic Acid Fermentation

11. 1) Alcoholic Fermentation
Alcoholic Fermentation Equation:
Pyruvic acid + NADH  Alcohol + CO2 + NAD+
Yeast and other organisms use alcoholic fermentation
Used to produce alcoholic beverages
Causes bread dough to rise
NAD+ allows glycolysis to continue generating ATP

12. 2) Lactic Acid Fermentation
Lactic Acid Fermentation Equation:
Pyruvic acid + NADH  Lactic Acid + NAD+
Most organisms carry out this type of fermentation
Used in the production of cheese, yogurt, buttermilk, pickles, etc.
NAD+ allows glycolysis to continue generating ATP