In the Operon concept,the regulator gene functions as:

In the given diagram of the lac operon,which one is the inducer?

$Y$ gene in $lac$ operon is responsible for .....

During $DNA$ transcription,$mRNA$ is usually single-stranded. However,sometimes an $RNA$ molecule is produced that is complementary to the $mRNA$. This is called ...... and its function is to ...... .

Wild type $E. coli$ cells are growing in a normal medium with glucose. They are transferred to a medium containing only lactose as the sugar. Which one of the following changes takes place?

What does an operon represent?