CBE 235 Final questions with 100% correct answers 2024

CBE 235 FinalLac Operon - correct answer -involved in heating lactose: inducible operon 1) The lactose repressor protein coded by Lacl bound to the operator tightly near the mRNA start site, blocking the ability of RNA poly to bind 2) Lactose introduced-- Lac repressor binds to lactose and changes conformation such that it can no longer bond to the operator 3) RNA poly can access the promoter and transcription goes 4) LacZ,LacY,LacA are transcribed Gregor Mendel Experiment - correct answer -7 pea plants traits (phenotype) -created discrete particle model -each plant had 2 copies of each gene and each gene controlled one trait -also determined independent law of assortment and law of segregation -particles of inheritance are genes Cell Theory - correct answer Walter Sutton: obsesrved chromosomes in pairs that sorted independently to gametes Gene Discovery - correct answer Thomas Hunt Morgan: bred fruit flies and track phenotypes; by using FF, more data and stats were collected Law of Independent Assortment - correct answer -each trait's alleles segregate without regard to the others Law of Segregation - correct answer Once genes are obtained, cell keeps them for life but can separate to form gametes Discrete Particle Model - correct answer Fluid Blending: Think chocolate milk example, once combined, cannot be separated back out