Fermentation(Anaerobic Respiration)

Fermentation(Anaerobic Respiration)

Chemical Energy & FoodChemical Energy & Food Calorie- amount of energy needed to

raise the temperature of 1 g of water 1 °C. Unit of measurement for energy found in food.

GLUCOSE is the most abundant and important sugar in nature.

Energy from Glucose/ Food is released gradually.

Calorie- amount of energy needed to raise the temperature of 1 g of water 1 °C. Unit of measurement for energy found in food.

GLUCOSE is the most abundant and important sugar in nature.

Energy from Glucose/ Food is released gradually.

Glycolysis (glyco=sugar, lysis= splitting)

Glycolysis (glyco=sugar, lysis= splitting)

1st Step in releasing energy from glucose.

One glucose molecule is broken into two molecules of pyruvic acid.

Produces 2 ATP Glycolysis can be followed by 2

different pathways. One with oxygen- Respiration, one without- Fermentation.

http://www.science.smith.edu/departments/Biology/Bio231/glycolysis.html

1st Step in releasing energy from glucose.

One glucose molecule is broken into two molecules of pyruvic acid.

Produces 2 ATP Glycolysis can be followed by 2

different pathways. One with oxygen- Respiration, one without- Fermentation.

http://www.science.smith.edu/departments/Biology/Bio231/glycolysis.html

Possible Pathways of Making Energy

Possible Pathways of Making Energy

Glycolysis

Respiration Fermentation

Anaerobic: WITHOUT oxygen

Aerobic: WITH oxygen

Fermentation (Anaerobic Respiration):

Fermentation (Anaerobic Respiration):

where ATP is released from organic compounds (such as glucose) in the absence of oxygen

2 Types: Lactic Acid Fermentation Alcoholic Fermentation

where ATP is released from organic compounds (such as glucose) in the absence of oxygen

2 Types: Lactic Acid Fermentation Alcoholic Fermentation

LACTIC ACID FERMENTATION

Performed by some fungi, some bacteria, and sometimes by our muscles.

Products include cheese, yogurt, and very sore muscles!

Alcohol FermentationPerformed by yeast, some kinds of bacteria, & a few other microorganisms use for energy

Products include CO2 and AlcoholUsed to make beer, bread and wine

Fermentation Equation:Fermentation Equation: Grapes

C6H12O6 2 C2H5OH + 2 CO2 + 2ATPMonosaccharide alcohol carbon

(NRG glucose (energy- dioxide

obtained)(energy-filled filled “poison”) substrate)

Grapes C6H12O6 2 C2H5OH + 2 CO2 + 2ATP

Monosaccharide alcohol carbon (NRG

glucose (energy- dioxide obtained)(energy-filled filled “poison”) substrate)

Controlled by enzymes

GlycolysisGlucose 2 Pyruvic Acid

GlycolysisGlucose 2 Pyruvic Acid

RespirationRespiration FermentationFermentation

Lactic AcidLactic Acid AlcoholicAlcoholic

Examples:

1. In muscle cells while exercising.

2. Dairy products

Example:

1. To make alcoholic beverages using yeast & sugars.

Aerobic Anaerobic

Alcoholic FermentationAlcoholic Fermentation

Time (hours)

Sugar

Yeast

Alcohol