Biology CP- Mr.Willets
Homework- Viruses
These can be answered from class notes
1) A virus does not resemble any living thing because it is non- _______________________ and it does not perform any of the __________________________
2) The one chemical a virus has that makes us think it is related to life is ______________________. Also, its ability to ________________________ might make us believe it's alive.
3) What does a virus need in order to reproduce? ____________________________
4) The basic structure of a virus includes the outer ______________________ and ______________ inside.
5) A virus can only infect a specific type of cell because some part of the virus must have the correct
_______________ that matches the _______________________ site on the host cell.
6) Viruses that infect bacteria are called ________________________________
Viruses that infect nasal passage cells are called ___________________________
What cells do rabies viruses infect? __________________ HIV? _____________
7) Because a virus must live inside a cell where it does damage, it is called a _________________________________________________________ (three words)
8) What is the difference between a virulent virus and a temperate virus? _______________________
___________________________________________________________________________
9) The process where a virus invades a cell and destroys it is called the _________________ Cycle.
The five steps in this process are: ___________________ , ________________________, _______________________, _______________________ , ____________________
What happens to the host cell when the new viruses are released? _______________________ This is called _______________
10) What process does a retro-virus use that is not used anywhere else? ________________________
What does this process do? _______________________________________________________
Why is it called a retro-virus? ___________________________________________________
Give an example of a retro-virus. ___________________
11) Viruses can carry a piece of ____________ from one host cell to another. If this happens in bacteria, it could produce a bacteria that is better able to ______________________
We use viruses to do this in what new branch of biology? ____________________________________
12) What are two things simpler than viruses but that act in a similar way? _________________ and
_______________________ What disease does one of these cause? ________________________