MICB 202 Study Guide - Final Guide: Lipid Bilayer, Endosome, Phospholipid
Document Summary
Provide a definition of the term virus & describe the basic structure of viruses. Viruses: genetic information (nucleic acid) surrounded by a protein coat (some have external structures) & an envelope of phospholipid. Obligate intracellular parasites: require hosts to reproduce. *note: viruses are not (cid:272)ells as they (cid:272)a(cid:374)"t sy(cid:374)thesize o(cid:449)(cid:374) atp or a(cid:373)i(cid:374)o acids, nucleotides, or proteins. Capsid: a protein shell enclosing nucleic acid or a nucleoprotein complex or a core dissociates when it enters the cytoplasm. Capsomers: individual units of a capsid (helical, icosahedral or complex in morphology) Envelope: lipid bilayer and associated glycoproteins that surround nucleocapsid. Virion: intact, fully assembled and infective virus particle. Core: internal body containing a nucleoprotein complex (found in some viruses) remains intact when it enters the cytoplasm. Describe the key steps of a virus replication cycle, and define the terminology used to describe these key steps: virus absorption attachment to susceptible host cell.
