Term
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Definition
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Term
| T/F A virus is metabolically active outside of the cell. |
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Definition
| False. Outside of a susceptible cell, the viral particle is metabolically inert. |
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Term
| T/F Viruses can possess both DNA and RNA. |
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Definition
| False. Viruses can possess either DNA or RNA. |
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Term
| When compared to conventional bacteria, viruses do not have a plasma membrane. |
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Definition
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Term
| Can viruses reproduce by binary fission? |
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Definition
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Term
| Do viruses have functional ribosomes? |
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Definition
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Term
| Why do we give antibiotics to animals with viral infections if the virus can not be treated by antibiotics?? |
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Definition
| Because the animal is more succeptible to secondary bacterial infections. |
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Term
| Can a virus generate its own energy? |
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Definition
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Term
| Are bacterial cells sensitive to interferon? |
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Definition
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Term
| What is a major reason that a virus cannot replicate on its own? |
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Definition
| A virus is too small!!! They must use host machinery to replicate. There is not enough room inside of the virus for all that is needed. |
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Term
| Viruses are ______ particles. |
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Definition
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Term
| Do viruses release toxins? |
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Definition
| No, the word virus means "fluid poison" but they do not actually have poisoning characteristics. This description was made because they easily passed through bacteriological filters. This left a "poisionous solution" in the beaker. |
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Term
| What is the host range of a virus? |
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Definition
| This is the range of animal species and tissue cells that the virus can infect. It can be broad or very limited. |
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Term
| Explain the structural unit, capsomeres, and capsid. |
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Definition
| The structural unit (or protomer) is a protein subunit that can be assembled into capsomeres. The capsomere will be assembled into the capsid. The capsid is the protein shell or coat that will enclose the nucleic acid genome. |
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Term
| The structural unit of the virus is composed of one protein subunit. |
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Definition
| False, it can be composed of one protein subunit or different protein subunits. |
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Term
| What is the term used to describe the capsid together with the enclosed nucleic acid? |
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Definition
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Term
| What is another name for a viron without nucleic acid. |
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Definition
| incomplete viron or empty capsid |
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Term
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Definition
| A helper virus will assist defective viruses replicate if they are found in mixed infections. |
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Term
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Definition
| This occurs in co-infected cells. The genome of one virus can become encapsidated in the protein coat of the second virus. |
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Term
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Definition
| Occasionally, during viral replication, the capsid may enclose host nucleic acid rather than viral. These particles will look like viruses, but they do not replicate. A pseudoviron can only be formed from viruses that replicate in the nucleus of the cell. |
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Term
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Definition
| This is a fragment of extrachromosomal genetic material that may become integrated into the chromosome or may remain separate. |
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Term
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Definition
A provirus is formed when the episome is integrated into the host cell chromosome. This is done in a latent state and must be activated before it is transcribed.
Progeny of the provirus will have the same genetic information as the provirus. |
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