Micro Chapter 6

6 Pages
Unlock Document

Biological Sciences
BIOL 2051
All Professors

Chapter 6 Virus Structure and Function General Properties of Viruses virionsObligate intracellular parasite made of nucleic acid surrounded by a protein coatOnly replicate inside hostNo nucleus organelles cytoplasmViral genomes containinformation for taking over host cellinformation for making viral proteinsCapsid genome replication proteinsInfectious agents smaller than virusesViroids and PrionsViroidsRNA without capsid viruses without capsidsInfect plantsPrionsProteinonly infectious agentBSE mad cow scrapie sheep CreutzfeldJakob kuru humans chronic wasting disease deer elkDefective protein causes normal protein to take on abnormal shape loses normal functionVirus StructureCapsidsCapsid protein surrounding nucleic acidCapsid are arranged to give virion symmetry Icosahedral capsids poliovirus herpes virusRoughly spherical20 equilateral triangles or facesFilamentous capsids M13 EbolaLong tube of protein with genome insideTube made up of hundreds of identical protein subunitsTube length reflects size of viral genomeComplex capsidsMixture of icosahedralfilamentous shapesMany bacteriophage viruses that infect bacteriaAsymmetrical shapesTend to be larger virusesPoxvirusesVirus StructureEnvelopesEnvelopelipid bilayer around capsid of some virusesAllows fusion to host cellOnly occurs if host cell not covered by cell wallBacteriophages are NONenvelopedEnvelope lipids come from host
More Less

Related notes for BIOL 2051

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.