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Cellular Respiration. Cell respiration. O 2 + C 6 H 12 O 6 CO 2 + H 2 O + Energy (ATP). Mitochondria. What is energy?. ATP = adenosine triphosphate “the energy currency of the cell”. ATP to ADP and back to ATP.
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Cell respiration O2 + C6H12O6 CO2 + H2O + Energy (ATP)
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