MCB2010 Lecture Notes - Lecture 15: Tobacco Mosaic Virus, Actinomyces, Tuberculosis
11 Nov 2020
School
Department
Course
Professor
Document Summary
This concept is embodied in the very word virus (latin word for. In some, envelope may be because covered by spikes: spikes, are cho and protein complex, can be used as means of identification, help viruses attach to host, cause clumping of rbc called hemagglutination, ex: mumps virus, vanola virus. Vaccina, influenza: general structural properties of viruses, these are 4 general morphological types of capsids and virion structure, polyhedral (many sided) viruses, many plant, animal, and bacterial viruses are icosahedron (with 20 faces and 12 corners) Polyhedral: helical viruses, resemble long rids that may be rigid or flexible, ex: tobacco mosaic virus. Helical flexible: envelope viruses, roughly spherical but somewhat variable shaped even though their nucleocapsid can be either icosahedral or helical, ex: hiv virus. Nonenveloped: complex viruses, capsid symmetry neither purely helical not icosahedral, may possess tails and other structures, may have complex, multilayered walls surrounding the nucleic acid, ex: t4 bacteriophage. 3 methods: contact, direct: person to person.
