Virus Biology

A virus consists of:

• RNA or DNA and a cell membrane

• RNA or DNA and a protein coat

• RNA and DNA and a protein coat

• proteins, cell membrane, and RNA

What happens after the virus has been taken up by the cell?

• it begins making protein

• it divides, or replicates

• it inserts into the host DNA

• it switches to infectious mode

What is the outside protective coating of a virus made of?

• lipids

• carbohydrates

• protein

• carbon

What reason do scientists give for saying that viruses are not living organisms?

• they cannot reproduce without the aid of a host

• they do not metabolize food into energy

• they do not have organized cells

• all of the above

• none of the above

True or False: Most viruses are so small that they can't be seen with with the unaided eye (basically saying we can't see them unless we have a microscope)

• True

• False

What happens in the lytic cycle?

• the spacecraft shaped virus attaches to the host cell then leaves

• the spacecraft virus kills the host cell

• the spacecraft shaped virus attaches to the host cells and as it leaves it kills the host cell

• the spacecraft virus attaches to the host cell injects DNA as the virus leaves it kills the host cell

What happens in the lysogenic cycle?

• A virus injects DNA into a host cell

• Bacteria injects genetic material into a host cell

• Bacteria injects DNA into a host cell

• A virus injects its genetic material into a host cell

Why do viruses need a host cell?

• because they aren't living

• because they need to reproduce

• because they can't live without a host cell

What does the lytic cycle result in?

• destruction of the infected cell and the membrane

• multiple new cells

• people going in sane

What is the outside, protein coat on a virus called?

• genetic material

• capsid

• envelope

• tail fibers