Death in Biology




In fact, the issue of cause of death is a matter which muchil Freud: Is the death of a living organism programmed in the genes or is a result of the malfunction, errors, and the activities of the organism, leading to cell aging and death? On this issue the current science seems to have found the answer. American biologist Leonard Hayflik found the limit of division of human cells - 50 (plus - minus 10) times. Follow-cell death is inevitable, for whatever tricks we went. Cells can be frozen, and then return to a normal state - and she just "remember" how many times she has shared. Alexei Olovnikov from the Institute of Chemical Physics, Russian Academy of Sciences was opened and the "counter" of cell division - the cause of aging and death of cells. It turns out that every time you double the (growing) cells DNA molecules are slightly shorter. When the contraction reaches the gene coding vital information, the cell dies. The process of shortening, named Olovnikovym marginotomiey, the scientist gives the following explanation: "a subsidiary chain of DNA bases, moving to a matrix chain, the enzyme DNA polymerase. Learn and catalytic centers have a spatially separated. When the first - as an engine - comes to the end of the matrix, the second -- as the last wagon train - will stop quite a distance and at the end of the chain does not copy. And if the center is heard from behind, then for the same reason, not copied the beginning of the chain. This is the length of the train - the distance between the centers - and determine how the chain is copied daughter. Another way of shortening DNA linked to the fact that the synthesis begins with a copy of fuse - a small area of RNA. After the synthesis of fuse is removed, and a copy is shorter than the matrix. For those who do not like to enter into "technical" details, I will say is easier: the initial length and shortening the train (DNA) during the movement (of life) are programmed. Why and by whom? God? Nature? Natural selection? Here, we depend on the problem of sick most modern studies of life - the problem of reconciling the religious (mystical), and a scientific, rational knowledge of the world. It is here that converge and diverge at the point of view of the phenomenon of death and possible afterlife of the model.

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