Cell respiration: the controlled release of energy from organic compounds in cells

Aerobic: Cell respiration requires oxygen.

Electron Transport chain and oxidative phosphorylation

Krebs Cycle

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.

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

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

does not need oxigen

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

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