STANDARDZoology-Genetics
STANDARD Zoology Operon Model MCQ Question
Type: MCQ-conceptual-Medium
The lac operon consists of
A
Four regulatory genes only
B
One regulatory gene and three structural genes
C
Two regulatory genes and two structural genes
D
Three regulatory genes and three structural genes
Correct Answer
Option B
Detailed Explanation
The lac operon consists of one regulatory gene (lacI) and three structural genes (lacZ, lacY, lacA) involved in lactose metabolism.
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