Metabolism I

Metabolism I - Metabolism and Energetics: Fueling Reactions...

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Unformatted text preview: Metabolism and Energetics: Fueling Reactions Requirements for growth:-Harvest energy-Synthesize building blocks (biosynthesis) Photoautotrophs Oxygenic: Plants, Algae, Cyanobacteria-Oxygen generated from H 2 O Anoxygenic: Purple and Green Bacteria-Do not evolve O 2 Metabolism- The sum total of biosynthesis and energy- harvesting reactions.-Enzymes-Adenosine triphosphate (ATP)-Chemical energy source-Electron carriers-Precursor metabolites-Process occurs in sequence of chemical reactions Components of Metabolism Components of Metabolism- Enzymes Biological catalysts: A specific enzyme facilitates each step of a metabolic pathway by lowering the activation energy of a reaction that converts SUBSTRATE into a PRODUCT. *Enzyme lowers the activation energy of a reaction -Accelerates the conversion of SUBSTRATE(S) into PRODUCT(S) http://www.chem.ucsb.edu/~molvisual/ABLE/induced_fit/index.html Induced fit: Hexokinase Inhibition Competitive Inhibition Feedback Inhibition...
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Metabolism I - Metabolism and Energetics: Fueling Reactions...

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