1. Fermentation

2. Step 1: Glycolysis Where? In cytoplasm What happens?
Mitochondria
Glucose
C6H12O6 C C
ATP
ATP C C
En-zyme C C
Where? In cytoplasm
What happens?
A) Glucose (from our food) is broken down into 2 pyruvates
B) 2 ATP molecules released for cellular processes

3. What’s after Glycolysis?
ATP
fermentation
No O2 O2
ATP

4. Step 2: Fermentation
During prolonged exercise, the oxygen you inhale mainly goes to your brain. Your muscles are now lacking oxygen.
Yeast perform alcoholic fermentation to make bread. Why isn’t bread alcoholic?
How to relieve sore muscles:
Massage
Bananas
Stretch after
Hydrate
Alcohol evaporates in the baking process
Muscle cells perform fermentation to keep you going!
Two Types of Fermentation (both anaerobic):
A) Lactic Acid fermentation
Performed by animals when muscles are not receiving oxygen
Lactic acid waste created
B) Alcoholic fermentation
Performed by yeast, some plants, bacteria
Alcohol & CO2 waste created

5. Lactic Acid vs. Alcoholic Fermentation
glycolysis
glycolysis
Lactic acid
Alcohol + CO2
Lactic acid fermentation
Alcoholic fermentation
Lactic Acid
Alcoholic
Location: Cytoplasm
Amount of ATP created: Zero
The Point? Make molecules to restart glycolysis
Waste: Lactic acid
Location: Cytoplasm
Amount of ATP created: Zero
The Point? Make molecules to restart glycolysis
Waste: Alcohol and CO2

6. (anaerobic respiration)
Where? In the mitochondria
Steps? Kreb’s cycle and electron transport chain
What happens? Pyruvate converted into 34 ATPs
With oxygen present
Glycolysis:
-- In the cytoplasm
-- Glucose is split into 2 pyruvate
-- 2 ATP created
If oxygen is lacking
Fermentation
(anaerobic respiration)
Where? In the cytoplasm
What happens?
Pyruvate is broken into either lactic acid or alcohol
Molecules to restart glycolysis created (No ATP)
Glycolysis restarts

7. Recap Name the two types of fermentation.
How much ATP does glycolysis create?
How much ATP does fermentation create?
Which molecule is broken down during glycolysis?
A buildup of which molecule causes sore muscles?
Which waste molecules are created by alcoholic fermentation?
Is fermentation aerobic or anaerobic? What does this mean?
Why is aerobic respiration preferred vs. fermentation?