BIO 200LLB Lecture 11: Bio Lecture 11

• School: University at Buffalo
• Department: Biological Sciences
• Course: BIO 200LLB
• Professor: J. Poulin

Document Summary

Some scientists argue that since viruses aren"t traditional cells and can"t replicate without. Highly organized and use the same kind of genetic storage as living things. They replicate, mutate, and they evolve just like living things. All derived from components of cells and probably evolved multiple times. Core inside the coat that contains nucleotides that are in strands. These nucleic acids can either be linear or circular. No plasma membrane and cytosol (not cells) They require a host cell to replicate for them but they evolve independently of other organisms often responding to the host. Icosahedral- a geometric solid with 20 equilateral triangles. Maximizes the internal capacity of the structure so it can hold more in less space. Binal- complex viruses have both icosahedral and helical elements: tobacco mosaic virus (tmv)- plant virus (helical, adenovirus- animal virus (icosahedral capsid, influenza- animal virus (helical capsid with envelop) Four times the size of a single hemoglobin.