17 terms

Chapter 17 Viruses

STUDY
PLAY

Terms in this set (...)

Capsid
Protein coat, only layer surrounding some viruses
Virus
Nonliving particle made up of nucleic acid and a protein coat or nucleic acid and lipid-protein coat
Provirus
Inserted viral DNA in a host cell's chromosome; transcribed into mRNA and then into viral proteins
Retrovirus
RNA virus that contain reverse transcriptase and RNA
Reverse transcriptase
Uses RNA as template to make DNA, which then inserts into host cell's genome.
Lytic cycle
Virus invades host cell, produces new viruses, and ruptures host cell when releasing newly formed viruses in this cycle
Lysogenic cycle
Infection cycle that allows viruses to hide in their host cell for long periods of time.
Temperate virus
Virus whose replication includes lysogenic cycle
Prophage
Phage DNA that is integrated into a specific site of host cell's chromosome; replicated when host bacterium replicates its own DNA
restriction enzymes
an enzyme produced chiefly by certain bacteria, having the property of cleaving DNA molecules at or near a specific sequence of bases.
Protease inhibitors
Class of drugs that blocks synthesis of new viral capsids.
CCR5
Along with the CD4+ receptor, this cell surface molecule is used by HIV to fuse with the host's cell membranes
H1N1
A form of flu that originated in swine and killed 9000 people in 2009
Viroids
Smallest known particles that are able to replicate
Prions
An infection agent that is a misfolded version of a normal cellular protein.
Bacteriophage
A virus that infects bacteria, also called a phage.
CRISPR-Cas
Sections of DNA in between palindromes that are DNA from previously infected viruses and are used to identify and destroy the virus if attacks a second time