RNA|Ribo|Nucleic|Acid|Biochemistry|Pharmacy Technician|Dr Muhammad Naeem Asghar RPh
RNA|Ribo|Nucleic|Acid|Biochemistry|Pharmacy Technician|Dr Muhammad Naeem Asghar RPh @drnaeempharmacist381 RIBONUCLEIC ACIDS (RN As) There are three main types of RNA Messenger or mRNA Transfer or tRNA Ribosomal or rRNA. It is estimated that tRNA forms 10 to 15%, mRNA 5 to 10% and rRNA 75 to 80% of the total RNA of the cell. mRNA encodes the amino acid sequence of one or more polypeptides specified by a gene or set of genes. tRNAs read the information coded in the mRNA and transfer the appropriate amino acids to a growing polypeptide chain during protein synthesis. rRNAs are constituents of ribosomes that synthesize proteins. RNA is a polsynucleotide, i.e. it contains a large number of nucleotides in its molecule. The nucleotides forming RNA consist of the following components:- 1. A nitrogenous base which may be either a purine (adenine or guanine) or a pyrimidine (cytosine or uracil). 2. Ribose which actually is D-ribose. 3. Phosphoric acid
