1. Fermentation

2. Step 1: Glycolysis Where? In cytoplasm What happens?
Mitochondrion
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 pyruvate ( carbon molecules)
B) 2 ATP molecules released for cellular processes

3. What’s after Glycolysis?
Creates: 2 ATP & 2 Pyruvate (2 - 3 carbon molecules)
Leads to either:
Aerobic Respiration
With oxygen present
Kreb’s Cycle
Electron transport chain
Anaerobic Respiration
Without oxygen
Fermentation
Allows glycolysis to restart
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 muscle cells are not receiving O2
Lactic acid waste created
B) Alcoholic fermentation
Performed by yeast, some plants, bacteria
Alcohol and 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. Aerobic Respiration Glycolysis Fermentation
Where? In the mitochondria
Steps? Kreb’s cycle and electron transport chain
What happens? 2 Pyruvate ( carbon molecules) create up to 36 ATPs
With oxygen present
Glycolysis
Where? In the cytoplasm
What happens?
Glucose is split into 2 Pyruvate ( carbon molecules)
2 ATP created
If oxygen is lacking
Fermentation
Where? In the cytoplasm
What happens?
Pyruvate ( carbon molecules) are broken into either lactic acid or alcohol
Molecules to restart glycolysis created (No ATP)
Glycolysis restarts

7. Public Service Announcement: Proper Use of Alcohol

8. The Maple Center Counseling
Safe Rides are available on Friday and Saturday nights from 10:00 pm to 2:00 am for teens living in Beverly Hills. High school students can call for a free ride home when they are under the influence of drugs and/or alcohol. When the teenager calls the Safe Ride number, the TMCC counselor assigned to the 24-hour HELP-LINE arranges for that teen to be picked up by the Beverly Hills Cab Company and taken home. Services are confidential.
Call (888) for a free ride home.

9. Review 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?
Which waste molecules are created by lactic acid fermentation?
Is fermentation aerobic or anaerobic? What does this mean?
Why is aerobic (cellular) respiration preferred vs. fermentation?

10. Review Answers Name the two types of fermentation.
Lactic Acid and Alcoholic
How much ATP does glycolysis create?
2 ATP
How much ATP does fermentation create?
ZERO ATP
Which molecule is broken down during glycolysis?
Glucose
A buildup of which molecule causes sore muscles?
Lactic Acid
Which waste molecules are created by alcoholic fermentation?
Alcohol and CO2
Which waste molecules are created by lactic acid fermentation?
Is fermentation aerobic or anaerobic? What does this mean?
Anaerobic, which means the process does NOT require oxygen
Why is aerobic (cellular) respiration preferred vs. fermentation?
Aerobic (cellular) respiration creates more ATP; specifically up to 36 ATP, while fermentation does not create any ATP, but allows glycolysis to continue.