A similarity between regulation of the lac operon in bacteria and the regulation of galactose utilization in yeast is that both pathways
A)transcribe all the genes necessary as one polycistronic mRNA.
B)use feedback inhibition to stop making their sugars.
C)use a modified version of their sugars as inducers.
D)are subject to catabolite repression.
E)C and D only

Question

Quizplus · Accepted Answer

Both the lac operon in bacteria and galactose utilization in yeast use a modified version of their sugars, allolactose and galactose-1-phosphate, respectively, as inducers. Furthermore, both pathways are subject to catabolite repression, which involves the inhibition of gene expression and enzyme activity in the presence of glucose or other preferred carbon sources.

A Similarity Between Regulation of the Lac Operon in Bacteria