Chapter 9 - Cellular Respiration

Chapter 9 - Cellular Respiration -...

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CELLULAR RESPIRATION -Chapter 9 C 6 H 12 O 6  + 6O 2    6 CO 2  + 6 H 2 O + energy Type of oxidation-reduction (redox) reaction MITOCHONDRION STRUCTURE Double membrane- allows compartmentalization OUTER MEMBRANE INNER MEMBRANE (CRISTAE) –contains Electron transport proteins MATRIX- contains enzymes for KREBS CYCLE INTERMEMBRANE SPACE- between cristae and outer membrane    Place where H +  ions accumulate during ETC GLYCOLYS     IS     “Glykos”= sweet; “lysis”=split apart GLUCOSE   2 PYRUVATE Occurs in cytosol Requires 2 ATP to get started Produces 4 ATP (net gain 2 ATP) Produces 2 NADH GLYCOLYSIS PATHWAY  Regulated by phosphofructokinase  ALLOSTERIC enzyme near beginning of pathway AMP turns pathway on           (AMP is high when ATP is needed) ATP turns pathway off            (don’t waste energy making ATP when not needed) EVOLUTIONARY LINKS Glycolysis = Most widespread metabolic pathway • Earliest fossil bacteria (3.5 billion years ago) but large amounts of oxygen not present until 2.7 BYA  OIL RIG O xidation I s L osing electrons R eduction I s G aining electrons
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Chapter 9 - Cellular Respiration -...

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