Animal virus infectivity

[Raiden2012]

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So in the TPR book, one of the questions states that it is true that animal viruses do not necessarily need to have an envelope to be infectious.

However, there is also another question that states that a virus that is added to an extract of cytoplasm does not become infective due to lack of envelope.

Can anyone please explain the difference??

 

[nickelbackfan]

So in the TPR book, one of the questions states that it is true that animal viruses do not necessarily need to have an envelope to be infectious.

However, there is also another question that states that a virus that is added to an extract of cytoplasm does not become infective due to lack of envelope.

Can anyone please explain the difference??

Maybe they are talking about different viruses?

 

[Raiden2012]

Haha, they were different questions.

So in the TPR book,
Viruses that infect human cells must have an envelope - false

They kinda skimped on the reasoning and just said that although viruses with an envelope are restricted to infecting animal cells, the outer membrane is not required.

if that's the case, wouldn't adding virus to cytoplasm contents still make it infective since it does not require an envelope?