CHAPTER 13 Flashcards
viruses, viroids, prions are __ disease-causing agents that lack cell structure and cannot metabolize, grow, self reproduce, or respond to their environment.
acellular
tiny infectious agent with nucleic acid surrounded by proteinaceous capsomeres
virus
capsomeres in viruses form a coat called
capsid
a complete viral particle, including a nucleic acid and capsid, outside a cell
virion
it is a virus that infects a bacterial cell
bacteriophage or phage
typically, a virus in a cell proceeds with a __ cycle
lytic replication cycle
what are the 5 stages of the lytic replication cycle
attachment
entry
synthesis
assembly
release
process of removing caspid on virion
uncoating
virions are released from the host cell either by __
lysis of the host cell
extrusion of enveloped virions
it is a process seen only with certain animal viruses
budding
an envelope is derived from a
cell membrane
these phages enter a bacterial cell and remain inactive
temperate / lysogenic phages
temperate phages remain inactive in a process called
lysogeny or lysogenic replication cycle
such inactive phages are called __ and are inserted into the chromosome of the cell and passed to its daughter cells
prophages
results when phages carry genes that alter the phenotype of a bacterium
lysogenic conversion