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.
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)