Virus review 2.1
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A ____________is a small, nonliving particle that invades and reproduces inside a living cell.
What is a virus called that waits for a while before taking over a cell's functions?
Viruses are so small that they are measured in ________________________.
Organisms that live on or in a host and cause harm to the host are called _____________.
Once inside a cell, the ____________takes over the cells functions. New viruses are then assembled.
The shape of proteins allows the viruses coat to ______________to, or lock onto, certain cells in the host.
Viruses vary widely in ______________. Some are round, while others are rod-shaped. Others are bricklike or threadlike.
After entering a cell, an __________virus immediately goes into action.
Like keys, a virus's proteins only fit into certain "__________," or proteins, on the surface of a host's cells.
A ______________________is a virus that infects bacteria.
A _____________is a disease that is mild and makes people sick for a short time before they recover.
No organisms are ____________from viruses.
What two parts of humans bodies does a cold virus affect?
the nose and throat
The coat of a virus is made of ____________.
Because viruses are not alive, scientists do not use ______________________ to name them.
A cold sore is an example of a __________ virus.
The only way in which viruses are like organisms is in their ability to ___________.
Scientists are putting viruses to use in a new technique called ____________________.
A __________is a living thing that provides a source of energy for a virus or organism.
What are the two basic parts of a virus?
- 1. protein coat for protection
- 2. inner core made of genetic material
Biologists consider viruses to be nonliving because viruses are not cells. They do not use energy to __________ or _______________.
- or respond to their surroundings
Viruses cannot make or take in ________ or produce _____________.
What four ways do scientists name viruses?
- 1. after the scientist that discovered them
- 2. after the organism that the virus infects
- 3. after the place the virus was discovered
- 4. after the disease they cause
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