Beckers World of the Cell Study Set 1
Quiz 20 :
The Regulation of Gene Expression
Looking for Cell Biology Homework Help?
Q15 Q15 Q15
The trp operon in E.coli is regulated in such a manner as to allow expression of the genes only when cellular levels of tryptophan are low.When tryptophan levels are adequate,the secondary structure of the mRNA halts translation.This form of regulation is known as
Q41 Q41 Q41
The regulation of eukaryotic gene expression is ________,allowing a relatively small number of different DNA control elements and transcription factors to establish highly specific and precisely controlled patterns of gene expression by acting in different combinations in different cell types.
Q54 Q54 Q54
A bacterium has the following lac operon genes located on the chromosome: I+P−Z−Y−A+. On a plasmid,this same bacterial cell has the lac genes I−P+Z−Y+A−. Which protein products will be made from lac genes in response to the presence of lactose? What type of protein expression (induced or constitutive)will there be for each protein that is made?