Cellular Respiration

O2 + C6H12O6  CO2 + H2O + Energy (ATP) Cell respiration O2 + C6H12O6  CO2 + H2O + Energy (ATP)

Mitochondria

What is energy? ATP = adenosine triphosphate “the energy currency of the cell”

ATP to ADP and back to ATP Energy is released when the last P is knocked off. (energy is needed to reattach the P.) A-P-P-P  A-P-P +P ATP ADP +P

There are 3 processes in cell respiration Glycolysis – splitting of glucose Kreb’s Cycle – aerobic respiration Electron Transport chain (ETC) – also aerobic, produces most of the energy

GLYCOLYSIS Takes place in the cytoplasm Net gain of 2 ATP Needs 2 ATP to start reaction Products: 2 ATP = energy 2 NADH = electron carrier 2 Pyruvic acid = will be broken down next * Does not require O2

Kreb’s Cycle AKA: “citric acid cycle” Occurs in the matrix of the mitochondria Produces: 1) Hydrogen carriers (NADH & FADH) 2) 1 ATP per pyruvate 3) CO2

ETC (Electron transport chain) Produces most (95%)of the energy (ATP) from cell respiration. Is an aerobic process (needs oxygen) Occurs in the inner membrane of the mitochondria Bounces H+ across membrane to make lots of ATP Attaches the Hydrogen to oxygen to produce water