Lecture 5 Flashcards
Viruses
Incapable of autonomous reproduction, growth or metabolism
virion
Complete virus particle
Viruses
Cannot reproduce independent of living cells nor carry out cell division
Virus Negative
It can cause disease
Viruses Positive
Important members of aquatic world and evolution
bacteriophages (phages)
Bacterial viruses
Viroids
Only RNA
Viruses
Protein and nucleic acid (membrane?)
Satellites
Only nucleic acids (DNA/RNA)
Prions
Proteins only
virions
contain a nucleocapsid
nucleocapsid
composed of nucleic acid (DNA or RNA) and a protein coat (capsid)
icosahedron
regular polyhedron with 20 equilateral faces and 12 vertices
binal symmetry
Large bacteriophages
Envelope proteins
Viral encoded proteins that project from the envelope surface called spikes