Viruses

cell enzymes

Host ________ such as DNA polymerase make many copies of the phage DNA and transcribe the genes within these copies into mRNA.

Viroids

________: composed solely of a single- stranded circular RNA molecule a few hundred nucleotides in length.

RNA genome

________ does not code for proteins.

HIV

In the case of ________, the DNA provirus is not excised from the host chromosome.

Episomes

________: genetic elements that replicate independently but occasionally integrate into host DNA.

Virus

________: small infectious particle that consists of nucleic acid enclosed in a protein coat called a capsid.

Viruses

________ evolved from macromolecules inside living cells (maybe plasmids)

Host range

________: number of species and cell types that can be infected.

Prions

________: composed entirely of protein; converts normal proteins to abnormal form.

Proteins

________ modify capsid proteins or serve as scaffolding.

viral capsids

Structure: ________ vary in shape and complexity.

Virus

________ integrates into host genome and may remain dormant for long periods of time.

Virus

small infectious particle that consists of nucleic acid enclosed in a protein coat called a capsid

Host range

number of species and cell types that can be infected

Structure

viral capsids vary in shape and complexity

ex

HIV

Episomes

genetic elements that replicate independently but occasionally integrate into host DNA

ex

Herpes simplex type I and II, varicella zoster

Viroids

composed solely of a single-stranded circular RNA molecule a few hundred nucleotides in length

Prions

composed entirely of protein; converts normal proteins to abnormal form