Question

What is polycistronic DNA ?​

Answer 1

mRNA carrying genetic information of many genes for synthesis of protein molecules is called polycistronic mRNA.

Answer 2

Polycistronic DNA refers to a stretch of replicating DNA with many cistrons.

• Polycistronic mRNAs enciphers several proteins in bacteria and chloroplasts.
• Polycistronic mRNAs have a leader sequence that appears before the first gene.
• The gene is preceded by an intercistronic region, which is then followed by another gene.
• A trailer section precedes the last gene in mRNA.
• Polycistronic transcripts can be found in the chloroplast.
• The psbb/psbH/petB/petD region contains polycistronic messages from many regions.