Virus

Part of our desoxyribonucleic acid (Image: Mehau Kulyk/SPL/Getty) When, in 2001, the human being genome was sequenced for the first time, we were confronted by several surprises. One was the classical lack of genes: where we had anticipated by chance 100,000 in that office were actually as fewer as 20,000. A extended surprise came from analysis of the genic sequences, which revealed that these genes make up a mere 1.5 per cent of the genome. This is dwarfed by DNA etymologizing from viruses, which amounts to round 9 per cent. On coronate of that, huge chunks of the genome be made up of mysterious virus-like entities called retrotransposons, pieces of self-centred DNA that be to parcel out no function separate than to make copies of themselves. These peak for no less than 34 per cent of our genome. All in all, the virus-like components of the human genome amount to almost half(a) of our DNA. This would once watch been brush aside as mere detritus DNA, provided we now whop that some of it plays a lively subprogram in our biology. As to the origins and function of the rest, we simply do not know. The human genome whence presents us with a paradox. How does this viral DNA come to be there? What role has it vie in our evolution, and what is it doing to our physiology?

To answer these questions we adopt to deconstruct the origins of the human genome - a bosh more fanciful than anything we previously imagined, with viruses playing a bigger part than you competency c be to believe. Around 15 days ago, when I was researching my defy Virus X, I came to the resultant there was more to viruses than meets the eye. Viruses are often associated with pestilences - epidemics accompanied by dandy mortality, such as smallpox, flu and AIDS. I proposed that plague viruses excessively interact with their hosts in a more elusive way, through and through symbiosis, with significant implications for the evolution of their hosts. Today we maintain growing establish that this is authoritative (New Scientist, 30 August 2008, p 38), and overwhelming tell that viruses have...If you indispensableness to get a adequate essay, order it on our website: Ordercustompaper.com

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