This document summarizes the key components and functions of ribonucleic acid (RNA). It discusses that RNA is formed through transcription using the enzyme RNA polymerase. RNA contains a ribose sugar, phosphoric acid, and one of four nitrogenous bases. The document then describes the three main types of RNA: messenger RNA (mRNA) which carries genetic information for protein synthesis, transfer RNA (tRNA) which provides attachment sites for mRNA on ribosomes, and ribosomal RNA (rRNA) which helps in translation. tRNA carries amino acids to ribosomes and attaches to mRNA codons through complementary base pairing to facilitate protein synthesis.