RNA(Ribonucleic Acid) It is a single stranded polynucleotide. By the action of RNA polymerase it is made in nucleus from one strand of DNA. protein synthesis is the primary function of RNA. RNA consists of nitrogenous bases, either purine (adenine or guanine) or pyrimidine (cytosine or uracil), sugar. (ribose) and phosphoric acid. Thymine (pyrimidine) is never pres- ent in RNA. There are three kinds of RNA 1.e. messenger RNA (mRNA), transfer RNA (tRNA) and ribosomal RNA (rRNA). mRNA takes the message from DNA to tRNA. Just one strand of DNA serves as a tem- plate for the synthesis of mRNA. tRNA also called soluble RNA (sRNA) reads the message and transfers amino acids to the proper site on the rRNA. rRNA in ribosome of the endoplasmic reticulum, synthesize protein from the amino acids brought by tRNA.
Biochemistry is the advanced Science, Scope and importance of Biochemistry is now very broad.