Question

Polycistronic messenger $RNA (mRNA)$ usually occurs in

• A. bacteria
• B. prokaryotes
• C. eukaryotes
• D. both (a) and (b)

Answer 1

Answer: (D)

both (a) and (b)

Answer 2

When a particular gene codes for a $mRNA$ strand it is said to be monocistronic or monogenic. When several genes (cistrons) are transcribed into a single $mRNA$ molecule, it is described as polycistronic or polygenic. Prokaryotic $mRNA$ are polycistronic.