BIOL-M 250 Final: Review session exam 4
Document Summary
Binds to the ter site: multiple on each side of dif site. Recognizes xerc/xerd-- is decatenated by dna topomeriase iv. Ex: benzopyrene: intercalate into dna(get in between bonds between bases and distorts them. Free radicals of oxygen want to attack everything and generall attack base of dna. Nonsense: prematurely inserts stop codon dna: agt= serine. Silent mutation: that codes for same amino acid. Insertion or deletion of base pairs not by 3. Polarity: side effect of mutation in an operon. A ,b, c are all genes, 3 total. Need polymerase i to come in to add the base eventually. Sos system: reca* can cleave protein called lexa when activated. Lexa binds to all repair pathways and turns the pathways on. Pathways: poliv, sola, uvr abc sola: binds to ftsz to prevent division. Need time to repair self so don"t keep going on. Uvrabc: comes in and excises damaged dna bases.
