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Cellular Respiration

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by

allie jones

on 1 October 2013

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Transcript of Cellular Respiration

Cellular
Respiration

function
This is the body's way of deriving energy or fuel from what we eat, or more specific, glucose. It takes glucose and converts it to 38 ATP's.
This is done in three stages:
First Process
Glycolysis
The literal meaning is “the breaking down of glucose” or sugar. This can take place in the presence or absence of Oxygen.
This process starts with glucose composed of a 6 Carbon backbone
(c-c-c-c-c-c)
the glucose is then 'broken down' using 2 ATPs (adenosine tri-phosphate) resulting in two, 3 carbon molecules called Pyruvate Acid
(c-c-c c-c-c)
Net Result:
2 ATPs
Release of high energy electrons
2 Pyruvate Acid
Third Process
Electron
Transport Chain
The released electrons from glycolysis and the Kreb's Cycle still hold most of the chemical energy from the original glucose and are brought to enzymes
produces the bulk of the energy is produced during the third stage of Cellular Respiration
Second Process
Citric Acid
or
Kreb's Cycle
Oxaloacetic Acid bonds with Acetyl CoA to form Citric Acid . This reaction is an enzyme catalyzed reaction.

Carbons are cleaved off to become Co2 in the body and are eventually exhaled. Other products are also transformed: NAD+ (Nicotinamide Adenine Dinucleotide) to NADH, FAD to FADH2, and ADP to ATP.
Citric Acid is oxydized through the cycle and becomes Oxaloacetic Acid and combines with Acetyl CoA to form Citric Acid once again.
Preparation
The Pyruvate Acids first need to be oxidized before entering into the Kreb's Cycle.
2 Carbons are cleaved off of the Pyruvate Acid to form Acetyl CoA and NAD+ is converted to NADH.
CO2
CO2
CO2
Co2
CO2
CO2
NADH
NAD+
ADP
ATP
FAD
FADH2
Produces:
4 ATP's
10 NADH
2 FADH
High energy electrons are released
resulting in:
36-38 ATP's

The complete oxidation of Acetyl CoA to CO2 and H2O produce high energy electrons which make the bulk of the ATP
Oxidation of Acetyl CoA takes place
C6H12O6 + O2 6CO2 + H2O + energy
Full transcript