BS 161 1st Edition Lecture 17 Outline of Last Lecture I Begin cellular respiration Outline of Current Lecture II Cellular respiration Current Lecture an allosteric enzyme can be activated or inhibited ATP is an inhibitor ADP and AMP are activators glycolosis can occur with or without oxygen Krebs cycle takes place in the mitochondrial matrix cycle oxidizes CoA pyruvate has more free energy than CoA Electron Transfer Chain the ETC is in the cristae of the mitochondrion electrons drop in free energy as they go down the chain the ETC generates no ATP moving protons across membrane creates energy goes with concentration gradient chemiosmosis the use of energy in H gradient to drive cellular work H gradient proton motive force protons go into the rotor and come out the other side of the mitochondrial matrix ADP and phosphate makes ATP NADH generates 3 ATP FADH2 generates 2 ATP overall cell respiration is a catabolic process glucose is broken down 36 or 38 ATP are generated cells are about 68 72 efficient
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