Molecular Basis of Inheritance Question 127
127. In an inducible operon, the genes are
[NEET Kar. 2013]
(a) Always expressed
(b) Usually not expressed unless a signal turns them “on”
(c) Usually expressed unless a signal turns them “off”
(d) Never expressed
Show Answer
Answer : b
Hints & Solution
(b) Inducible operons are usually switched off. This is a type of operon which is switched on when a chemical called inducer is present. the inducer is almost always a substrate.
