Anaerobic Respiration

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ANAEROBIC RESPIRATION

Aida Rogonich, Cristina Botello,

Jacqueline Enriquez, Sarah Wolberg, Takira

ALCOHOL FERMENTATION: STEP ONE

Glycolysis is the breaking of a carbohydrate into two pyruvates

Occurs in the cytoplasm of cells

No oxygen needed.

GLYCOLYSIS: PART ONE

2 PGAL’s (Phosphoglyceraldehyde - 3Carbon molecules) are formed from the breaking down of glucose (6C)

Two ATP's are required

GLYCOLYSIS: PART TWO

2 pyruvates are created from 2 PGAL's (3C)

Producing 4 ATP's and 2 NADH's

Net production = 2ATP’s and 3 NADH’s

WHERE DOES IT OCCUR?

No oxygen is used

2 Acetaldehyde is reduced by NADH to ethanol

Regenerating supply of

NAD+

Carbon dioxide may be realeased

Glycolysis continues

2

ND

STEP

IN THE CYTOSOL OF YEAST!

2

ND

STEP CONT.

When the first step occurs and 2 acetaldehyde is formed, 2 CO

₂ is released

Then acetaldehyde accepts hydrogen and electrons from the 2 NADH formed through

Glycolysis

With the combining of e-, H+, and 2 acetaldehyde, 2 NAD+ is regenerated and

2ethanol is created

ALCOHOLIC FERMENTATION: LACTIC ACID FERMENTATION:

Glucose + 2 ADP + 2 Pі

2 ethanol + 2 CO

+ 2 ATP

+ 2 H

O

C

H

₁₂

O

CO

2

OR

2 C

H

OH + 2

Glucose + 2 ADP + 2 Pi

2 lactate + ATP + 2

H

O

ALCOHOLIC FERMENTATION EQUATION

SUMMARIZATION OF FERMENTATION

HTTP://TRC.UCDAVIS.EDU/BIOSCI10V/BIS10V/MEDIA/CH06/FERMENTATION.SWF

WHAT ORGANISMS

USE LACTIC ACID FERMENTATION?

Fermented vegetables

Pickles!

The sugars in the pickles are converted to lactic acid, preserving the pickle

Lactobacillus bulgaricus – a bacteria

Yogurt

Lactose is fermented by the bacteria to lactic acid, which both thickens the yogurt and restricts the growth of bacteria that poisons the food

Humans

 during anaerobic exercise

 lactic acid is fermented in muscles where oxygen is depleted

 makes muscles burn

RESOURCES

 http://www.icr.org/article/172/

 http://trc.ucdavis.edu/biosci10v/bis10v/medi a/ch06/fermentation.swf

 http://www.bio.miami.edu/~cmallery/255/255 atp/mcb8.5.fermentation.jpg

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