CSB328H1 Study Guide - Final Guide: Signal 107, Hydrogen Bond, Bioplastic
25 Jan 2014
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7: direct sensing of molecues . than another, either by binding to a ligand or temperature responsis (tf that fold differently under one temp. 9. there are a number of varied envmts that bacteria have to routinely respond to: presence/absence of oxygen. 2. change in ph lac operon of e coli is an example of response to nutrient availability. 10: e coli grows in gut, e coli has the ability to break down lactase, e coli thought o have coevolved w mammals, mammals produce lactase that the bacteria can take advantage of. 15. in th absence of lactose, there is a repressor called laci which is encoded in the lac operon structure (upstream) laci binds to dna seq just upstream of the promoter so rnap cant bind. 22: and the promoter for rnap to bind and the downstream operons are transcribed, beta-galactosidase is an enzyme that breaks down lactose into monosacharides, plenty of lactose in the envmt.
