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Intro to Biological Functions of DNA
DNA is a wondrous molecule in terms of its information storage capacity. This tiny little coil is responsible for holding every physical trait of our biological existence.
Biologically speaking, DNA is responsible for organizing the transmission of information from the nucleus to the cell body (transcription).
Also, DNA self-replicates, in the sense that it can separate longitudinally in halves, copying the separated chains of information, and reattaching duplicate copies to the separated strands, thereby 'cloning' itself (replication).
Furthermore, DNA is capable of also separating along its horizontal plane, and 'mixing' itself with similar (also) separated helices in a process known as recombination.
DNA synthesizes RNA in the process of information transmission.
DNA duplicates itself during the process of cellular division.
DNA 'mixes-it-up' with other DNA, promoting natures 'cooking pot'.
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Description : The work of geneticists who have labored for years to map human DNA is the subject of this offbeat yet highly informative documentary from the PBS series Nova. Host Robert Krulwich, a correspondent for ABC Nightline, visits with scientists who explain, in terms understandable to laymen, the enormous challenges faced and overcome by scientists working on the Human Genome Project.
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Description : What makes DNA different from hordes of competitors purporting to help readers understand genetics is that it is written by none other than James Watson, of Watson and Crick fame. He and his co-author Andrew Berry have produced a clear and easygoing history of genetics, from Mendel through genome sequencing. Watson offers readers a sense of immediacy, a behind-the scenes familiarity with some of the most exciting developments in modern science.
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