Role of Molecular Biology in the 21st Century

Topics: DNA, Gene, RNA Pages: 3 (855 words) Published: February 21, 2013
1…………….ROLE OF MOLECULAR BIOLOGY IN THE 21ST CENTURY THE STATEMENT: Molecular biology of the 21st century, which says that the science devoted to elucidating the structure and function of genomes. On the other hand, the major advances gave rise to central dogma of molecular biology, comprising the three major processes in the cellular utilization of genetic information. The first is replication, the copying of parental DNA to form daughter DNA molecules with identical nucleotide sequences. The second is transcription, the process by which parts of the genetic message encoded in DNA are copied precisely into RNA. The third is translation, whereby the genetic message encoded in messenger RNA is translated on the ribosomes into a polypeptide with a particular sequence at amino acids. Some persons have spoken in favour of the discovery of the structure of DNA as a helical duplex of nucleotide polymers by James Watson and Francis Crick in 1953 has permitted life scientists to re-examine most biology phenomenon using the research tools developed by molecular biologists and biochemistry. First of all, he reminded us of the fact that system biology is not really new. As early as in the 1950s and 1960s, a scientific field with the same intention appeared on the horizon. Norbert Wiener, who was among the physicists who pioneered this discipline, defined it as cybernetics. During the last decades, the publication frequency in the field of cybernetics has dropped considerably, and Niehrs predicts that, in the 21st century, system biology will take the place of cybernetics. Niehrs own research is focused on the regulation of Synexpression Group (SG) i:e clusters of co-expressed genes that participate in a biological process. Synexpression Groups functions in diverse processes such as cell signaling, cell cycle and in protein and lipid biosynthesis. They can be identified by their expression patterns in various eukaryotes. Let us consider the quality of DNA consisting of two...
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