Question

Why prokaryotes have polycistronic m RNA while eukarkaryotes have monocistronic m RNA. describe it precisely.?

Answer 1

Hey mate here is ur query...

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Polycistronic mRNA is that messenger RNA which encodes for two or more proteins.
Polycistronic mRNA contains many codons of cistrons.


Monocistronic mRNA is that messenger RNA which encodes for only one or specific protein or polypeptide.Monocistronic mRNA contains single codon of cistron.

That 's why Polycistronic mRNA have multiple ORFs (open reading frames).

Monocistronic mRNA have single ORF (open reading frame).

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Hope this will help you..

Answer 2

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$\huge{\bf{ \red {\fbox{\underline{ \color{blue}{Prokaryotes.. Monocistronic}}}}}}$

The coding region that initiates the translation mostly consists of a linear structure or sequence of codons. These codons make it monofunctional for the cell. Moreover, these RNA has single ORF (open reading frame) each of which corresponds to a single or specific gene transcript. These codons or ORFs are then translated into a polypeptide according to the code. Monocistronic mRNA is present in eukaryotes like human cells. Many eukaryotic RNAs are non-functional and require many kinds of changes (post-transcriptional changes). These changes may be like splicing, splicing, removal of introns, etc.

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