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Cell respiration: the controlled release of energy from organic compounds…
Cell respiration: the controlled release of energy from organic compounds in cells
Aerobic: Cell respiration requires oxygen.
Electron Transport chain and oxidative phosphorylation
Series of protein complexes embedded in the mitochondrial membrane
Electrons are transferred from this complexes
The pumping of hydrogen atoms generates the gradient used by the ATP synthase to synthesize ATP
needs oxygen in the final stage
key components are: NADH, electrons from it, hydrogen ions, molecular oxygen, water and ADP and Pi which when combine form ATP
Krebs Cycle
Takes place in the matrix of the mitochondria
provides reduced electron carriers for the electron transport chain
Acetyl CoA transfers the 2C acetyl group to the oxaloacetate :
NAD+ becomes NADH
FAD+ becomes FADH2
does not need oxigen
Glycolysis
The breaking down of sugars
one molecule of sugar breaks down into 2 pyruvates
Two molecules of ATP are formed
Occurs in the cytoplasm of the cell
does not need oxygen.
Preparation
Each molecule of pyruvate goes into the mitochondrion and in the matrix
Pyruvate oxidezes and combines with the coenzyme A
Acetyl coA is formed
NADH and CO2 are produced