UNIT 2 Bio 11 Viruses

Why do viruses need a host

because they are nonliving particles that need to replicate inside a host cell they cannot reproduce on their own

Why can't antibiotics kill viruses

antibiotics can only kill bacteria

What virus is spherical and surrounded by membrane envelope and is also regular in shape

envelope

What virus is regular in shape and is a hollow tube filled with amino acids

helical

What virus is geometric in shape and is made of triangles fuse together in a sphere

icosahedral

What virus is geometric and shape and is icosahedral with a tail and infects bacteria

bacteriophage

How do viruses get energy

From the host cell

What are the two ways viruses can reproduce

Active and hidden

Describe active reproduction

virus attaches to cell, the viral genetic material takes over and begins to replicate immediately

Describe hidden reproduction

genetic material is combined with the cells and lies dormant until it is ready to become active

What are some common illnesses caused by virus

chickenpox, colds, flu, west Nile virus, chickenpox, aids, hepatitis

What are some characteristics that viruses share with living things

they reproduce but only in a living cell and they can mutate or change and they have DNA or RNA

What are the non-living characteristics of viruses

they are not made out of cells they have no metabolism they do not need food or energy they can be dehydrated and stored in definitely

What is a virus

nonliving particle that invades and then replicates inside a host cell