Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

components of a virus

capsids, nucleic acids, and envelopes

virus shape

Helical and Icosahedral

virus without envelope

naked virus


non-cellular parasitic protein coated genetic elements that can infect all living things, including microgranisms

to multiply viruses depond on

the infected cells machinery to multiply and disperse


fully form virus that is able to cause an infection in the host


study of viruses

an obligate intracellular parasite


can see viruses only with

electron microscope

the capsid is composed of protein subunits called


protein shell around the nucleic acid core of a virus


naked virus

does not have an envelope; released from the infected host cell through cell lysis


Nucleic acid and capsid together

function of capsid

simulate antibodies production for future infectins, protects the viral nucleic acid, facilitates attachment of virus, helps introduce the virus to suitable host cell

capsid shape


The central core of a virus particle consists

nucleic acid; RNA or DNA: (not both)

DNA virus

usually double stranded, may be single stranded; circular or linear (replicated and assembled in nucleus).

RNA virus

usually single stranded, may be double stranded; positive and negative-sense RNA. (replicated and assembled in cytoplasm)

a RNA Virus can cause

cancer and tumers

reverse transcriptase

an enzyme that converts a single strand of RNA to a double stranded DNA

negative RNA virus must first

synthesize a DNA copy

positive sense RNA

single stranded genomes that are ready for immediate translation. (protein synthesis)

negative sense RNA

single stranded genomes that must be converted into proper form - not ready for translation.

in mulitpilication viruses aquire envelopes during


sequence of events in viral multiplication

adsorption, penetration, uncoating, synthesis, assembly and release

DNA viruses multiply in the host cells


RNA viruses multiply in the host cells


ctyopathic effects

effects due to infection of a virus, cells can undergo gross shape/size changes and/or develop intracellular changes


a virus that infects bacteria

oncogenic virus

a virus that can cause cancer

T-even phages infect ______ bacteria



(lysogenic replication cycle) Process of viral replication in which a bacteriophage enters a bacterial cell, inserts into the DNA of the host, and remains inactive. The phage is then replicated every time the host cell replicates its chromosome. Later, the phage may leave the chromosome.


geometric figure having 20 surfaces that meet to form 12 corners

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording