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AIDS

AIDS (acquired immunodeficiency syndrome) is a disease caused by a virus- HIV (human immunodiciency virus). The first cases in this country came to light in the early eighties. Although the origins of AIDS remains uncertain it is thought to have emerged decades ago in sub-Saharan Africa. There is ....

Middle of Paper
.... This means that the protein coat contains RNA instead of DNA and when the virus injects its genetic material into the host cell, it must first cause the cell to transcribe, using a unique enzyme called reverse transcriptase, it into complementary- DNA (c-DNA) before replication can occur. The virus is spherical in shape and is made of two parts: an envelop and core. The envelop is similar to a typical cell membrane (bilipid layer) imbedded with three proteins. The core section is bullet-shaped surrounded by a protein. Inside is the genetic material, RNA, covered by another p ....

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