BIOLOGY 1A03 Study Guide - Final Guide: Lac Operon, Repressor, Permease

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Escherichia coli (e. coli): can use different sugars as a course of carbon and energy (carbohydrate metabolism, must synthesize the appropriate enzymes to metabolize the available sugars= regulation, chaos would occur if all the genes were expressed simultaneously, cells have to be extremely selective about which genes they express, can grow under different environmental conditions, gene expression occurs when a protein or other gene product is synthesized and active, an individual that doesn"t synthesize a protein it doesn"t need has less resources to devote to making the proteins it does need. Dna transcription(cid:224)mrna translation(cid:224)protein post translation modification(cid:224)activated protein: transcription control: do not make the mrna or regulate the amount produced, translational control: prevent the mrna from being translated or degrade the mrna, post translational control: prevent the protein from being modified (chemicals, all of these forms of control can occur but transciptional control phosphorylation etc.