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23 Cards in this Set
- Front
- Back
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Miniscule, acellular, infectious agent having either DNA or RNA... |
Virus |
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Does not have cytoplasmic membrane, cytosol or organelles... |
Virus |
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Cannot carry out any metabolic pathway, cannot grow or respond to environment and cannot reproduce independently... |
Virus |
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The extracellular state of a virus is called a... |
Virion |
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Protein coat surrounding viral nucleuc acid is called a... |
Capsid |
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Some viruses have a phospholipid layer on the outside called a(n)... |
Envelope |
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A virus may have _____ or _____ but NEVER both. |
DNA or RNA |
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All viruses always replicate... |
INSIDE another cell |
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This provides protection for viral nucleic acid and is a means of attachment to host cells... |
Capsid |
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The five stages of the lytic replication cycle are... |
1. Attachment 2. Entry 3. Synthesis 4. Assembly 5. Release |
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Explain attachment... |
The phage attaches to surface of host cell... |
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Explain entry... |
Phage injects DNA into host by penetrating through cell membrane |
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Explain synthesis... |
The host cell's DNA is degraded and the cell's metabolism is directed to initiate phage biosynthesis. Phage DNA then replicates inside cell, synthesizing new phage DNA and proteins. |
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Explain assembly |
DNA assembles into fully-formed viral phages which means the phages are mature. |
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Explain release... |
The cell lyses and bursts. The phages are released. |
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True or False: viral DNA can incorporate itself into bacterial DNA... |
True |
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Define Lysogenic Conversion |
This results when phages carry genes that alter the phenotype of bacterium. |
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True or False: Animal viruses have tails/tail fibers. |
False |
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In the replication of animal viruses, DNA viruses often enter the... |
Nucleus |
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In the replication of animal viruses, RNA viruses often replicate in the... |
Cytoplasm |
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In animal viruses, most DNA viruses assemble in the ____________, while most RNA viruses develop solely in the _______________. |
Nucleus, cytoplasm |
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Extremely small, circular pieces of RNA that are infectious and pathogenic in plants... |
Viroids |
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A parasitic particle that forms large vacuoles in the brain and as a characteristic of spongy appearance... |
Prion |
