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Virology I
Question | Answer |
---|---|
Nucleic acid of all DNA viruses except _________ is double-stranded | Parvoviruses |
Most DNA viruses except ______ replicate in the nucleus | Poxvirus |
Most RNA viruses replicate in the cytoplasm except ________ | Orthomyxoviruses and HIV |
Nucleic acid of all RNA viruses is single-stranded except _________ | Reoviruses |
What makes retrovirsues unique? | Reverse transcriptase enzyme |
Units of protein surrounding the genome | Capsids |
These viruses - only contain the virion - stable to temperature, pH and chemicals | Naked Viruses |
These viruses are more fragile and pleomorphic with a typical bilayered membrane | Enveloped viruses |
What is the first step of viral replication? | Adsorption/Attachment |
A glycoprotein that is a part of the outer layer of the virus that fuses with the target cell by binding to CD4 and a chemokine receptor | Envelope glycoprotein GP120 |
Viruses that infect bacteria | Bacteriophages |
Ends with destruction of bacterial cell | Lytic cycle |
DNA remains integrated into the bacterial cell chromosome, generation after generation | Isogenic cycle |
A bacteriophage that kills the bacteria every infection cycle | Virulent bacteriophage |
A bacteriophage that displays Isogenic life cycle | Temperate bacteriophage |