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22 Cards in this Set

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prokaryote
single-celled organisms that lack a nucleus
bacillus
rod shaped prokaryotes
coccus
spherical prokaryotes
spirillum
spiral and cork-screw shaped prokaryotes
flagellum
whiplike structures used for movement
photoautotroph
prokaryotes that carry out photosynthesis in a manner similar to green plants
chemoautotrophs
prokaryotes that obtain energy directly from inorganic molecules
photoheterotrophs
prokaryotes combine the autotrophic and heterotrophic styles of life
binary fission
reproduction; doubles is size, then divides
conjunction
hollow bridge forms between two cells
endospore
formed when a bacterium produces a thinck internal wall that encloses its DNA
nitrogen fixation
the process of converting nitrogen into a form plants can use
pathogen
disease-causing agents
anti-biotic
compounds that block the growth and reproduction of bacteria
sterilization
destroys bacteria by subjecting them either to great heat or to chemical action
virus
particale of nucleic acid, protein, and in some cases lipids that can reproduce only by infecting living cells
capsid
a virus's outer protein coat
bacteriophage
viruses that infect bacteria
lytic infection
process in which the host cell is lysed and destroyed
lysogenic infection
a host cell makes copies of the virus indefinitely
retrovirus
some viruses that contain RNA as the genetic information
prions
short for "protein infectious particles"