Virus question...

Debate and discussion of any biological questions not pertaining to a particular topic.

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biodawgz
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Virus question...

Post by biodawgz » Thu Jan 22, 2009 4:50 pm

The question is true or false: All virus particles produced from infected cells are infectious.

I find this to be very confusing. On the one hand, some virions are non-infective if they become damaged or are missing part of the genome in the cell. I know that a virus particle is non-infective if it cannot replicate, but am not sure if 'produced' means replicated.

Is the question saying this: A cell is injected with a virus. Are all virus particles that replicate infectious?

or is it saying. A cell is injected with a virus. Are all the virus particles from this injection in the cell infectious.

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jonmoulton
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Re: Virus question...

Post by jonmoulton » Thu Jan 22, 2009 6:29 pm

I'd read that question as asking whether all of the viral particles released from an infected cell are also infectious.

biodawgz
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Re: Virus question...

Post by biodawgz » Thu Jan 22, 2009 9:39 pm

and would you agree with me, that No they are not.

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jonmoulton
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Re: Virus question...

Post by jonmoulton » Fri Jan 23, 2009 1:08 am

"some virions are non-infective if they become damaged or are missing part of the genome in the cell"

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biohazard
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Post by biohazard » Mon Jan 26, 2009 9:03 am

I think many viruses, especially those with high mutation rates such as retroviruses, produce vast numbers of viral particles that are not infectious. Many mutations easily render some crucial receptor-binding protein or viral enzyme inactive, and thus the virus cannot infect its target cells.

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