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AP Biology Chapter 19 Vocab


AP Biology Ch Apter 19
  
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Protein shell enclosing the viral genome
 
Capsid
membrane that cloaks the capsid that in turn encloses a viral genome
 
Viral envelope
viruses that infect bacteria
 
Bacteriophage/phage
limited variety of hosts a phage can infect
 
Host range
phage reproductive cycle that culminates in the death of the host cell
 
Lytic cycle
phage that reproduces only by the lytic cycle
 
Virulent phage
endonuclease that recognizes &cuts DNA molecules foreign to a bacterium
 
Restriction enzyme
allows replication of the phage without destroying the host
 
Lysogenic cycle
phage capable of using both modes of reproducing within a bacterium
 
Temperate phage
phage genome that has been inserted in to a specific site on a bacterial chromosome
 
Prophage
RNA virus that reproduces by transcribing its RNA into DNA &then inserting the DNA into a cellular chromosome
 
Retrovirus
Transcribes and RNA template into DNA, providing and RNA --> DNA information flow, the opposite of the usual
 
Reverse Transcriptase
The retrovirus that causes AIDS
 
HIV
Symptoms and signs present during the late stages of HIV infection, defined by a specified reduction in the # of T cells & the appearance of characteristic secondary infections
 
AIDS
Integrated viral DNA that never leaves the host's genome, remaining a permanent resident of the cell
 
Provirus
Harmless variant or derivative of a pathogen that stimulates the immune system to mount defenses against the harmful pathogen
 
Vaccine
General outbreak of a disease
 
Epidemic
Global epidemic
 
Pandemic
circular RNA molecules that infect plants
 
Viroids
Infectious proteins that appear to cause a # of degenerative brain diseases in various animal species
 
Prions

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