Chapter 20 Biology Miller & Levine

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virus
A tiny, nonliving particle that invades and then reproduces inside a living cell.
prokaryotes
Cells that do not contain nucleus
Bacteriophage
A virus that infects bacteria
bacteria
live almost everywhere. This molecule is made up of sugar and amino acids. Some have a cell membrane outside the cell that protects them. They may also use flagella or pili for movement.
bacilli
rod-shaped prokaryotes
spirilla
spiral and cork-shaped prokaryptes
cocci
sphere-shaped prokarotes
binary fission
a type of asexual reproduction in which an organism relicates its DNA and divides in half, producing two identical daughter cells
pathogen
organism that can cause sickness
vaccine
a preparation of weakened or killed pathogens used to produce immunity to a disease
antibiotic
drugs to treat bacterial infection - keeps bacteria from growing and reproducing - do not harm host cell
Prion
protein particles that cause disease
infection
Contamination or invasion of body tissue by pathogenic organisms
Colonization
The presence of bacteria in or on your body without causing any symptoms of infection.
antibiotic resistance
the ability of bacteria to withstand the effects of an antibiotic
lytic cycle
cycle of viral infection; results in replication of virus and cell destruction
lysogenic cycle
replicates the viral genome without destroying the host
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