After the discovery of Shannon's information theory in 1948 there was a lot of excitement about its application in biology. Motivated by the discovery of genetic codes even several people worked on comma-free codes (example, Golomb). However this trend could not continue further and people found around 1956 that application of Shannon's ideas to biology had not yielded many results. A similar case is with coding theory. Now after 50 years our understanding of biology is increasing day by day and we have sequenced for the first time genome of mouse and Human. Biology is at the place where chemistry was about 200 years back. The goal of this paper is to give a brief account of the recent developments in codes and biology that have taken place. In particular we focus ourselves on the existence of error correction in Molecular Biology.