BIOL 112 Study Guide - Final Guide: Lac Operon, Electron Acceptor, Oxidative Phosphorylation
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BIOL 112 Full Course Notes
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Document Summary
Operon: cluster of genes controlled by one promoter. Laci: repressor, if bound to operator, stops transcription. Lac operon has lacz (breaks lactose), lacy (transports lactose in), laca. Laci not part of operon but is transcribed. When lactose present, changes shape, cannot bind to operator, no transcription (good promoter present) When falls off sometimes, lacy brings lactose. Malt: activator, does not bind well to operator itself. Operon has malp and malq (break down maltose) Activates when maltose present; malt binds to maltose, change shape, bind to operator (transcription!) Metabolism: building/breaking of energy sources to harness energy. Catabolism: - delta g anabolism: + delta g. Energetic coupling: energy from atp is coupled with another reaction (-g coupled with another +g to create overall g) Atp: has high potential energy; works by phosphorylating (transferring a phosphate group po4. Atp hydrolysis: products adp + pi more strongly bonded than reactant atp (less o repulsion) (-g here)
