Question

Operon is a

• A. Sequence of three nitrogen bases determining a single amino acid.
• B. Set of closely placed genes regulating a metabolic pathway in prokaryotes.
• C. Segment of DNA specifying a polypeptide.
• D. Gene responsible for switching on and switching off other genes.

Answer 1

The correct option is B Set of closely placed genes regulating a metabolic pathway in prokaryotes.

Operons are segments of genetic material (DNA) which functions as regulated unit or units that can be switched on or switched off. It is a sequence of closely placed genes regulating a metabolic pathway in prokaryotes.