Introducing the recombinant lac operon/mouse tyrosinase DNA into mice is only half of the equation for regulating tyrosinase.In addition to lac operon/mouse tyrosinase DNA,what other gene must be added to mice to regulate tyrosinase expression?
A)the lacZ gene
B)the lacY gene
C)the lacI gene
D)the lac operator

Question

Quizplus · Accepted Answer

The lacI gene encodes the lac repressor protein, which controls the expression of the lac operon by binding to the operator region. Without the lacI gene, the lac operon/mouse tyrosinase DNA would not be effectively regulated, leading to potentially harmful overexpression of tyrosinase. Therefore, adding the lacI gene is necessary for proper regulation of tyrosinase expression. The other options (A, B, and D) are not directly involved in regulating gene expression in this system.

Introducing the Recombinant Lac Operon/mouse Tyrosinase DNA into Mice Is