Question

What is cistron?

Answer 1

Cistron:

1. It is a segment of DNA coding for a polypeptide.
2. It is an alternative term for genes.
3. The three sections of DNA that make up a transcription unit are the promoter, structural gene, and terminator.
4. A transcription unit's structural gene might be monocistronic or polycistronic.
5. A structural gene codes for only one polypeptide in the monocistronic transcription unit. Example - Eukaryotes
6. The structural genes of the polycistronic transcription unit code for many polypeptides. Example - Mostly in bacteria or prokaryotes.