BIOL 3142 Study Guide - Midterm Guide: Mitosis, Apoptosis, Silent Mutation
8 Sep 2017
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The basic requirements of evolution: non-random mortality adding selective pressure on a species, variation differences in a trait (ex. hair colour, genetically based. Hiv: hiv evolves quickly because of its high turnover rate and high mutation rate, can constantly evolve, animals with a slow turnover rate and maturation rate will be least likely to survive. Structure of hiv: hiv viron is more complex than a regular viron, has 10-11 genes, rna instead of dna retrovirus, contains proteins in the centre, and a viral coat. Cons of being affected by hiv: viruses replicate so much in the cd4 t cells, causing it to burst and release more viruses, immune cells attack your own cd4 t cells. Aids: acute stage infection occurs, the number of the hiv virus increases. Crash then occurs due to initial immune response: chronic stage this stage can vary in time, but does not have aids, aids stage cells crash and t cells decrease.
