what is mean RNA, explain three types of rna?
Answers
Explanation:
RNA or Ribonucleic acid is found predominantly in cytoplasm and is mostly single stranded. There are three types of RNA:
1. Messenger RNA or mRNA: mRNA is single stranded without any base pairing. Structural components of mRNA include a CAP at 5' end, non coding region 1, initiation codon AUG, coding region, termination codon, non coding region 2 and poly-A sequence at 3' end. mRNA is translated into proteins by ribosomes.
2. Ribosomal RNA or rRNA: rRNA is the basic constituent of ribosomes and formed from the nucleolar organising region of chromosomes in eukaryotes. It plays structural and catalytic role during translation of mRNA into proteins.
3. Transfer RNA or tRNA: tRNA accounts for only 0.025% of the total DNA content. The primary structure of tRNA is considered as a clover leaf model. The function of tRNA is to align the required amino acid according to the nucleotides sequence of mRNA.
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Answer:
Ribonucleic acid is a polymeric molecule essential in various biological roles in coding, decoding, regulation and expression of genes. RNA and DNA are nucleic acids. Along with lipids, proteins, and carbohydrates, nucleic acids constitute one of the four major macromolecules essential for all known forms of life.
the many types of RNA, the three most well-known and most commonly studied are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), which are present in all organisms