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Biology Vocab
Chapter 18
Term | Definition |
---|---|
Virus | Infectious particle made only of a strand of either DNA or RNA surrounded by a protein coat. |
Pathogen | Agent that causes disease. |
Viroid | Infectious particle made of single-stranded RNA without a protein coat, that almost always use plants as their host. |
Prion | Infectious agent that consists of a protein fragment that can cause other proteins to fold incorrectly. |
Capsid | Protein shell that surrounds a virus. |
Bacteriophage | Virus that infects bacteria. |
Lytic Infection | Infectious pathway of a virus in which host cells are destroyed. |
Prophage | DNA of a bacteriophage inserted into a host cell's DNA. |
Epidemic | Rapid outbreak of a disease that affects many people. |
Vaccine | Substance that stimulates an immune response, producing acquired immunity without illness or infection. |
Retrovirus | Virus that contains RNA and uses the enzyme called reverse transcriptase to make a DNA copy. |
Obligate Anaerobe | Prokaryote that cannot survive in the presence of oxygen. |
Obligate Aerobe | Prokaryote that cannot survive without the presence of oxygen. |
Facultative Aerobe | Organism that can live with or without oxygen. |
Plasmid | Circular piece of genetic material found in bacteria that can replicate separately from the DNA of the main chromosome. |
Flagellum | (plural: flagella) Whiplike structure outside of a cell that is used for movement. |
Conjugation | Process by which a prokaryote transfers part of its chromosome to another prokaryote. |
Endospore | Prokaryote cell with a thick, protective wall surrounding its DNA. |
Bioremediation | Process by which humans use living things to break down pollutants. |
Toxin | Poison released by an organism. |
Antibiotic | Chemical that kills or slows the growth of bacteria. |