Viruses

22 cards·by sarasupancic@hotmail

Why are viruses part of biology?

they are active inside living cells

What two components make up a virus?

protein coat & nucleic acid

What type of virus uses reverse transcriptase?

retro virus

what three shapes can viral nucleic acid have?

helical, round, straight

What two shapes can a virus have?

icosahedral, helix

What is the protective coat of a virus?

protein called a capsid

what is a viroid composed of?

RNA

What is a prion composed of?

protein

RT uses ____ as a template to make ____ to make protein?

RNA, DNA

where do viruses reproduce?

only in living cells

In which replication cycle is the viral DNA integrated with the host DNA?

lysogenic

what type of virus rarely cause disease & do not kill host cell immediately?

temperate

virulent viruses go through which replication cycle?

lytic

temperate viruses go through which replication cycle?

lysogenic

what is a bacteriophage?

virus that infects a bacteria

what are the projections on the envelope composed of?

glycoproteins

what is an obligate intracellular parasite?

something that can replicate only in a host cell

What activates a prophage?

radiation or chemicals

prophages are created in which replication cycle

lysogenic

how do anitviral drugs work?

keep viruses from replicating

What type of vaccine includes a genetically altered virus?

attenuated

What is the study of viruses?

virology