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16 Cards in this Set
- Front
- Back
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Bacteriophage T4 is an example of |
Complex viruses |
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Capsomere is |
A subunit of the viral protein shell |
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Enveloped viral membranes are generally ____ with associated virus-specific ____. |
lipid bilayers / glycoproteins |
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Reverse transcriptase is an |
RNA-dependent DNA polymerase |
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Viruses infecting ___ are typically the easiest to grow in the laboratory. |
Prokaryotes |
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Virus |
Genetic element that cannot replicate independently of a living host cell |
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Virus particle (virion) |
Extracellular form of a virus Facilitates transmission between host cells Contains nucleic acid surrounded by a protein coat and sometimes other layers of material |
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Viral genomes are |
Either DNA or RNA Most linear, some circular |
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How are viruses classified? |
By the hosts they infect Ex: bacterial viruses (bacteriophages) |
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Size of viruses |
0.02 - 0.3um smaller genomes than cells usually |
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Capsid |
The protein shell that surrounds the genome of a virus |
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Nucleocapsid |
Complete complex of nucleic acid and protein packaged in the virion |
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Enveloped virus |
Virus that contains additional layers around the nucleocapsid |
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Shapes of virions and viruses |
Helical (rod-shaped virus) Icosahedral (spherical virus) |
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Virus envelope composition |
Lipid bilayer with embedded proteins (glycoproteins) |
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Complex viruses |
Virions with several distinct parts Or Bacterial viruses with complicated structures (ex: Icosahedral heads and helical tails) |
