REVIEW OF CELL FUNCTIONS. Metabolism: catabolism, anabolism. Metabolism - the processes by which cells synthesize biomolecules and generate energy Catabolism : the process of breaking down larger molecules to extract energy and create reaction substrates.
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Free energy change of reaction
ATP is regenerated from ADP when phosphate bonds in other compounds undergo hydrolysis in metabolism or in respiration.
Aerobic CatabolismGlycolysis/EMPGlucose pyruvateTCA Cycle/Krebs/Citric Acidpyruvate CO2 + NADHElectron Transport ChainO2H2O H+ ADP ATPNADH NAD gradient…….…………..
TCA cycle inter-mediates can be funneled off for biosynthesis
No net oxidation or reduction since electron transport chain is not available to produce NAD+ required in TCA cycle
Generates NADPH (reducing power for for biosynthesis) and 5 carbon sugars (make up ATP, RNA, DNA, others)