Explain the structure and function of different types of RNA.

Explanation

(i) mRNA (messenger RNA): Single stranded, carries a copy of instructions amino acids into proteins. It is very unstable and comprises 5% of total RNA polymer, Prokaryotic mRNA (Polycistronic) carry coding sequences for many polypepuu sequences for many polypeptides. Eukaryotic mRNA (Monocistronic) contains information for only one polypepe
(ii) tRNA (transfer RNA): Translates the code from mRNA and transfers amino acids to the ribosome to build proteins. It is highly folded into an elaborate 3D structure and comprisesabout 15% of total RNA. It is also called as soluble RNA.
(iii) rRNA (ribosomal RNA): Single stranded, metabolically stable, makeup the two subunitsof ribosomes. It constitutes 80% of the total RNA. It is a polymer with varied length from 120 - 3000 nucleotides and gives ribosomes their shape. Genes for rRNA are highly conserved and employed for phyl genetic studies.