Midterms Flashcards
(205 cards)
complete infectious virus particle; may be identical to the nucleocapsid; more complex virions include the nucleocapsid + envelope
Virion
smallest infectious agents causing diseases in plants
Viroids
protein shell enclosing the nucleic acid core
Capsid
morphologic units seen on the surfaces of icosahedral virus particles representing clusters of structure units.
Capsomeres
capsid together with the nucleic acid
Nucleocapsid
capsomeres are morphological units seen on what shape of virus?
icosahedral
outer coat of some viruses. Acquired as they penetrate or are budded from the nuclear or cytoplasmic membrane; Always contains altered host-cell membrane components.
Envelope
morphologic units composed of structural units embedded in the envelope
Peplomers
viruses that infect bacterial cells.
Bacteriophages
general term to describe situations where mixed infections result in enhanced yields of one or both viruses in the mixture.
Complementation
mechanism by w/c a particular base sequence in mRNA produces specific amino acid sequence in a protein
Translation
specific information encoded in a nucleic acid chain is transferred to mRNA
Transcription
viruses that cannot reproduce on their own nucleic acid and virions are non-infectious.
Satellite Virus
functionally deficient particles in some aspect of replication and may interfere with the replication of normal viruses.
Defective Virus
required by certain defective closely related viruses to replicate
Helper Virus
They require a helper virus for transmission and multiplication.
Satellite Virus
at what year did ivanovsky identified TMV?
1892
who first identified Tobacco Mosaic virus?
Ivanovsky
who discovered FMD? and when?
Loeffler and Frosch
What did Remlinger & Riffat-Bay discovered in 1903
Rabies virus
what did Sanarelli discovered in 1898?
myxoma virus
which animal is Myxoma virus common?
Rabbit
what did Carre discovered in 1905?
Canine distemper virus
At what year did Loeffler and Frosch discovered FMD?
1898