NEETZoologyMolecular Basis of Inheritance
What is an operon?
Options
- AA group of genes involved in the same metabolic pathway
- BA group of genes encoding regulatory proteins
- CA group of genes encoding structural proteins
- DA group of genes that are not involved in any metabolic pathway
Correct answer
A. A group of genes involved in the same metabolic pathway
Step-by-step solution
The elucidation of the lac operon was also a result of a close association between a geneticist, Francois Jacob and a biochemist, Jacque Monod. They were the first to elucidate a transcriptionally regulated system. In lac operon (here lac refers to lactose), a polycistronic structural gene is regulated by a common promoter and regulatory genes. Such arrangement is very common in bacteria and is referred to as operon. To name a few such examples, lac operon, trp operon, ara operon, his operon, val operon, etc.