Question

unit exam - genetics
what is an operon?
a group of genes that regulate together and have a related job.
a structure within the cell that carries out photosynthesis.
a type of rna involved in gene regulation.

Explanation:

An operon is a functional unit in bacteria. It consists of a group of genes that are regulated together and have related functions. For example, in the lac operon in E. coli, genes related to lactose metabolism are grouped. The second option describes a chloroplast (in plant cells for photosynthesis). The third option is incorrect as an operon is not RNA.

Answer:

A. A group of genes that regulate together and have a related job.