Chapter 24 Flashcards
A biological particle composed of genetic material and protein.
virsus
a bilipid membrane that surrounds the capsid
envelope
a protein sheath that surrounds the nucleic acid core in a virus
capsid
A virus that reproduces by the lytic cycle. Causes a disease
virulent
A virus that reproduces only by the lysogenic cycle. Does not cause a disease.
Temperate
contain the enzyme reverse transcriptase. This enzyme allows the virus to make DNA from RNA. The AIDS virus is one
retroviruses
a short single strand of RNA with no surrounding capsid.
viroid
a glycoprotein particle containing a polypeptide of about 250 amino acids. They are capable of reproducing in some living cells.
prions
viruses that infect bacteira
bacteriophage
a method of viral replication in which a viral genome is replicated as provirus without destroying the host cell
Lysogenic cycle
single celled organisms that do not have a membrane bound nucleus.
Prokaryote
Are adapted to the harsh environment in which they live.
Archeabacteria
live only in the absence of free oxygen.
methanogens
live only in areas of high salt concentration.
extreme halophiles
live only in places that are very acidic and where temperatures are very hot. (110 degrees C)
thermoacidophiles