Cellular Respiration

Cellular respiration:

C6H12O6 —> CO2+H2O (-ΔG)

ADP+P —> ATP (+ΔG)

Glucose oxidation occurs in 3 stages:

  1. glycolysis (produces ATP and electron carriers)

  2. pyruvate oxidation (produces CO2 and electron carriers)

  3. citric acid (kreb) cycle (produces ATP, CO2, and electron carriers)

Glucose oxidation:

glycolysis - the splitting of sugar

a. matter

  • glucose is converted to pyruvate (x2)

b. energy

  • electrons in glucose transsfered to NAD+ to make NADH

  • APTP is made

pyruvate oxidization - takes place in the matrix

a. matter

  • pyruvate is converted to Acetyl-coA (releasing CO2)

b. energy

  • electrons transferred to NAD+ to make NADH

Citric acid cycle

a. matter

  • acetly-coA is converted to CO2

b. energy

  • electrons transferred to FAD and NAD to make NAD+ and FADH2

Electron transport and oxidative phosphorylation

Energetic coupling

  • favorable, movement of electrons from NADh to O2

  • unfavorable, movement of H+ proton from the matrix to inter-membrane space