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Viruses are composed of protein and DNA. The DNA encodes the protein as well as the DNA for the virus. Viruses depend on host cells because they are incapable of reproducing themselves. They enter the host cell and the viral DNA is inserted into the host DNA. The virus then "hijacks" the host cells replication machinery to make more viral protein and viral DNA.
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Viruses do not contradict the idea that all living things are made of cells because?
Viruses aren't considered to be alive because they depend on a host cell for energy and reproduction.
Are viruses general or specific to the cells that they infect?
viruses are specific to the cells they infect called host cells
Why do viruses not contradict the idea that all living things are made of cells because?
A virus is an extremely small cell. You can have big cells and little cells. Viruses aren't considered to be alive because they depend on a host cell for energy and reproduction.
Viruses depend on living things for what?
Viruses depend on living cells because they reproduce inside of them.
Why do viruses kill?
Your host cells in your body.
Viruses can reproduce only inside what?
host cells!
What is a host cell for a virus?
Host cells of viruses include human and other animals, and plants and fungi. Also bacteria and protozoa and algae are host cells of viruses.
Is there a difference with viruses and cells?
Yes there is a difference. Viruses are non-living and cells are living This is because Viruses can't reproduce on their own without a host. They don't have a metabolism like cells. They can't maintain homeostasis. They cannot synthesize proteins (they lack the ribosomes to do so) without a host. Without a host viruses can neither generate nor store ATP (adenosine triphosphate). Viruses cannot live unless they have a host.
How do you explain how copies of viruses are produced?
copies of viruses are produced because some viruses stay inside there host cells.
Parasytic bacteria depend on eukaryotic host cells of what?
There are many forms of parasitic bacteria. The parasitic bacterium that depends on eukaryotic host cells are of the Rickettsia family.
What are these molecules called that protect potential host cells?
Antibodies protect potential host cells. They act against bacteria and viruses.
Why do scientists think there are so many types of viruses?
Because viruses originated from a variety of host cells.
