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AIDS
Beginning of essay
(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 remains uncertain it
is thought to have emerged decades ago in sub-Saharan Africa. There is a
close ....
Middle of essay
....l 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 protein (Combating AIDS.... |
| Number of words: 1767 |
Approximate pages: 7 |
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