Monday, 28 November 2011

DNA - Important Facts About It

by S.Eswara rao

Scientist named Friedrich Miescher discovered DNA. In 1896, the year DNA is found. With respect to gene discovery, we have a very interesting facts. Until 1843,. Researchers in the presence of genes in cells Researchers say the genetic code of the protein.

DNA is very different from structured proteins.DNA four nucleotides, but twenty protein amino acids. Thus, the protein composition of DNA is very different. Therefore we must not confuse DNA to proteins.

We use four-letter genetic code is written. DNA genetic code consists of letters A, G, C, T, A, G guanine and cytosine, adenine, thymine, CT. But we do not have all four characters together. We combine these and a word of three letters, the encoded amino acids. Here Proline is an excellent example of this is encoded as a CCA.

We can even redundancy in DNA. With more than one word encode the same amino acid.

James Watson and Crick discovered the double helix structure of DNA using X-ray crystallography, Rosalind is Frankl. DNA replication occurred after the discovery of the double helix structure to achieve.

Another important fact about DNA is the molecular properties. Although it is a very important part of our body, but perhaps the worst of times. DNA molecules are very fragile. That does not keep well apart. The mechanism that we can our bodies healthy. To fix this error, but what harm can not be repaired, this requires a change. They are the cause of a disease called cancer. Cancer is an incurable disease. We can only try to save the lives of patients on long term

During the process of DNA replication errors can occur. At the end of the process, the number of errors in DNA but is still very low. It was just an error in one billion bases.

Although mutation harm living things that are important to induce genetic variation.

RNA is an intermediary between DNA and proteins.


Post a Comment