Molecular Basis of Inheritance Question 139

139. What does “lac” refer to in what we call the lac operon?

(a) The number $1,00,000$

(b) Lactose

(c) Lactase

(d) Lac insect

Show Answer

Answer : b

Hints & Solution

(b) Lactose operon in E.coli is a catabolic pathway in which the structural genes remain switched off unless the inducer (Lactose) is present in the medium.