Definition of Ribonucleic acid (RNA)

Ribonucleic acid (RNA)

Ribonucleic acid (RNA) is a type of nucleic acid that resembles DNA but contains ribose instead of deoxyribose. It is synthesized based on a DNA template and exists in various forms, each playing vital roles in protein production and other cellular functions:1. Messenger RNA (mRNA) is a form of RNA that mirrors the precise nucleoside sequence of active DNA. It serves as the carrier of genetic information from DNA to the cell's protein synthesis machinery, where it dictates the sequence of amino acids in proteins.2. Transfer RNA (tRNA) consists of short RNA chains found within cells. There are 20 distinct types of tRNA, each of which attaches to a specific amino acid and transports it for protein assembly, ensuring the amino acid sequence aligns with the instructions from DNA.3. Ribosomal RNA (rRNA) is a fundamental part of ribosomes, acting as a general site for polypeptide synthesis.

Medical Definition & Meaning

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