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Viruses & Bacteria

Review for Infectious Disease Unit

virus a non-living particle made of proteins, nucleic acids, and sometimes lipids; can only reproduce by infecting living cells
capsid the protein coat surrounding a virus
bacteriophage viruses that infect bacteria; literally "bacteria-eaters"
lytic infection a virus enters a host cell, makes copies of itself, and causes the cell to burst (or lyse); symptoms usually appear within several days of infection
lysogenic infection viral nucleic acid is inserted into the host cell's DNA, where it is replicated along with the host DNA without immediately damaging the host cell; symptoms may not appear for months or years after infection
prokaryote a cell that does NOT contain a nucleus; also known as bacteria
decomposer an organism that breaks down dead tissues and recycles the nutrients back into the soil
pathogen any disease-causing agent
antibiotic a drug used to treat a bacterial infection; useless against viral infections
vaccine a weakened or killed pathogen that is injected into the body and triggers the immune system to produce antibodies, providing immunity to a specific disease
antibody proteins produced by the immune system which bind to pathogens and tag them for destruction by white blood cells
eukaryote a cell that contains a nucleus
Created by: SHSbiology
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