BIO 330 Lecture Notes - Lecture 1: Cell Nucleus, Endoplasmic Reticulum, Chromosome
Document Summary
An encapsulated piece of generic information (rna or dna: contained within a capsid (protein coat) o o. The genome of the virus must be contained in the capsid, other viral genetic material outside of the capsid is not the genome of that virus the capsid prevents viral genome degradation by dnases or rnases. Also provides anti-receptors that recognize and dock with receptors on host cells: minimal viruses have a nucleocapsid (capsid containing the nucleocapsid acid) and nothing else. Envelope (optional, not present in all viruses) o a lipid bilayer, membrane on the outside of the rigid capsid: rabbis, hiv and influenza viruses all have envelopes o o o o. Envelopes provide protection, another layer/barrier to protect the nucleocapsid acid. The membrane of the envelope generally comes from the last host the virus replicated in. If the virus has an envelope the anti-receptor will be on the outer leaflet of the envelope membrane.
