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viruses entering cells

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viruses entering cells

Postby backtoschool » Tue Dec 13, 2005 7:11 am

Please bear with my thought process on this one. I'm hoping someone can confirm if I'm getting it or not.
I've recently learnt about cell membrane transport. One of the questions at the end of the chapter deals with an airborne supervirus being inhaled and asks the specific structure through which the virus entered the cell and the transport mechanism used. Is it safe to assume it wouldn't be through osmosis because osmosis is the diffusion of water? If it's airborne is it safe to assume bulk transport wouldn't be used? I'm left with diffusion or facilitated diffusion. I'm not so sure if it's facilitated diffusion because even though the cell didn't recognize it as harmful I'm not sure it would mistake the virus for something extra that it needs. That leads me to believe the transport mechanism used is diffusion. Am I on the right track?
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Postby mith » Tue Dec 13, 2005 6:36 pm

Try endocytosis and injection
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Postby MrMistery » Wed Dec 14, 2005 8:07 pm

Viruses do not diffuse through the membrane, they are too big. Generally each virus has it's own way of getting in the cell. I have no idea what the answer the want is...
But for your knowledge, each virus has it's own mechanism.
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Postby kaylin » Thu Dec 15, 2005 10:02 am

hey not endocytos
1. adsorbtion
2.penetration
3.eclipse
4.originating genom of virus
5.virion cpmpose
6.maturation
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Postby Geordie Boy » Fri Dec 16, 2005 9:10 am

I would have said endocytosis in most animal viruses. The cell wraps it in a vesicle and tries to digest it, which releases the virons RNA or DNA
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Postby biostudent84 » Fri Dec 16, 2005 9:53 am

When learning about how Viruses get their genetic material into the cell, the bacteriophage is usually used to show one way.

http://www.humnri.com/Humex/Submission/ ... ophage.jpg

The "feet" of the bacteriophage (shown in the picture) rest on the cell membrane. Then the "legs" have the virus "sit down" to press the Tail Pins into the membrane. Then the bacteriophage injects its genetic material directly into the cytoplasm.
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Postby victor » Fri Dec 16, 2005 12:24 pm

Geordie Boy wrote:I would have said endocytosis in most animal viruses. The cell wraps it in a vesicle and tries to digest it, which releases the virons RNA or DNA


Mostly like that and it's thru the receptors and anti-receptors mechanisms...
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Postby lara » Mon Jan 02, 2006 10:32 am

the steps-attach insert genetic material etc.is ok for phages.but in animal viruses a process similar to endocytosis is involved called viropexis.
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