Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

16 Cards in this Set

  • Front
  • Back
do viruses contain ribosomes?
are viruses capable of protein synthesis?
no, they dont have any ribosomes
what does obligate intracellular parasite mean?
always require a living host where the viruses can enter the cell and replicate their nucleic acid
what are the 3 parts of the survival dilema of viruses?
1. replicate genome
2. pack genome to ensure transmission
3. alter structure and or function of the host
define virion
a complete virus particle that represents the extracellular phase of the virus life cycle; at the simplest, it consists of a protein capsid surrounding a single nucleic acid molecule
define: capsid
the protei coat or shel that surounds a virion's nucleic acid
define: nucleocapsid
the nucleic acid and its surrounding protein coat or capsid; the basic unit of virion structure
define: envelope
the outer membranous layer that surrounds the nucleocapsid in some viruses
define: peplomer
a protein or protein complex thatextends from teh virus envelpe and often is important in virion attachmetn to the host cell surface
define: protomer
an individua subunitof a viral capsid; a capsomer is made of protomers
define: capsomer
The ring-shaped morphological unit of which icosahedral capsids are constructed
define: eclipse phase
infectious virus cannot be seen or recovered from infected cells
when does the eclipse phase end?
when the first virus particle is observed w/in the viral cell
define: latent phase
progeny virus accumulates intra-cellulary
when does the latent phase end?
when the first free virus is released; different families have different time periods
what are the 7 stages of viral multiplication?
adsorption (attachment)
replication of genome