Exam 18: Control of Gene Expression

If a researcher moves the repressor gene (lacI) and its promoter, to a position at some several thousand base pairs away from its normal position, which of the following describes the most likely effect on the lac operon?

If a researcher moves the promoter for the lac operon to the region between the beta galactosidase (lacZ) gene and the permease (lacY) gene, which of the following results would be most likely?

Which of the following describes the role typical proto-oncogenes have when they are expressed in cells that are not cancerous?

Which of the following types of mutation would convert a proto-oncogene into an oncogene?

Which of the following results is most likely to occur if acetylation of histone tails in the chromatin of embryonic cells is increased?

A cell is considered to be differentiated if it has which of the following characteristics?