DNA and RNA structure - 1
Structure of Nucleic acids DNA and RNA form the genetic material of all living organisms. They store the information in biochemical form. What is a gene? A gene is a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein. The genes are expressed by two important process - Transcription of genes from DNA to RNA and then Translation of Genes into Proteins. While DNA makes multiple copies of itself by the process of DNA replication. We will discuss all of them in detail later. Structure of DNA DNA is a double helical structure. J.D. Watson and F.H.C. Crick proposed the three-dimensional model of physiological DNA in 1953 on the basis of X-ray diffraction studies of DNA obtained by Franklin and Wilkins. They gave the structure of B- DNA. The important features of Watson – Crick Model or double helix model of DNA are as follows: 1. The DNA molecule consists of two polynucleotide chains or ...