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Viruses iconViruses
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active immunity immunity to disease resulting from the production of antibodies.

AIDS (acquired immune deficiency syndrome) disease resulting from a disorder of the immune system by HIV.

antibody substance that prevents infection; antibodies are produced by white blood cells in response to an invasion by an organism or substance.

bacteriophage virus that invades a bacterium.

capsid outer protein coat of a virus.

DNA (deoxyribonucleic acid) nucleic acid that carries genetic material and stores the information needed for protein synthesis.

HIV (human immunodeficiency virus) the virus that causes AIDS.

host organism in which another organism lives, such as a parasite.

immunity body?s system of natural resistance to disease.
interferon substance produced by a cell when it?s invaded by a virus.

lytic cycle reproductive process in viruses in which the host cell is killed.

lysenogenic cycle reproductive process in temperate viruses.
microorganism microscopic organism.

parasite organism that feeds off other living organisms.

passive immunity immunity that occurs when a person receives antibodies produced in another person or in an animal that has developed immunity to the disease.

poliomyelitis viral disease causing stiffness and paralysis that may result in death.

replicate process in which DNA molecules form exact copies or duplicates.

RNA (ribonucleic acid) nucleic acid that reads genetic information carried by DNA and guides protein synthesis.

temperate virus virus that does not immediately cause disease.

tobacco mosaic virus that infects tobacco and other plants.

vaccination process in which an antigen is introduced to stimulate the immune system.

virulent disease-causing agent that is highly infectious.

virus tiny non-living particle made up of hereditary material and protein.