Term
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Definition
| Subcellular infectious agents that replicate only inside living host cells and are therefore obligate intracellular parasites |
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Term
| What nucleic acids do viruses contain? |
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Definition
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Term
| How do viruses reproduce? |
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Definition
| Synthesis of subunits they assembly of complete virus |
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Term
| What are consequences of viruses being non-living? |
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Definition
| They must be able to utilize host cell processes to produce their components and must encode and required processes not provided by the cell. |
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Term
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Definition
| A virus with only the nucleic acid and the capsid, no envelope. |
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Term
| What is reverse transcription? |
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Definition
| The process of converting RNA to DNA |
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Term
| What enzyme is important for viruses to make on their own because it is not found in normal cells? |
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Definition
| RNA-dependent RNA polymerase |
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Term
| What are defective viruses? |
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Definition
| Viruses without a complete genome, so they are only able to replicate/form a protein coat when their defect is complemented by a helper virus |
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Term
| What is a permissive cell? |
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Definition
| A cell that provides the biosynthetic machinery to support the complete replicative cycle of the virus |
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Term
| How is the capsid synthesized? |
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Definition
| Proteins assemble in protomers, protomers assemble in pentamers (capsomers), which assemble into the capsid/nucleocapsid |
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Term
| Where do most DNA viruses replicate? RNA? |
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Definition
DNA: nucleus
RNA: cytoplasm |
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Term
| What are some properties of naked capsids? |
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Definition
| Environmental stability to temperature, acid, proteases, detergents, and drying; release from cell by lysis |
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Term
| What are some properties of enveloped virused? |
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Definition
| Environmentally labile and disrupted by acid, detergent, drying, and heat; modify the cell membrane during replication; released by budding and cell lysis |
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Term
| What are viroids and prions? |
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Definition
| Both are subviral pathogens. Viroids contain only RNA, and prions contain only protein |
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