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Viruses
Question | Answer |
---|---|
What is the definition of a virus? (O__ I___ B___ P___) | Obligate intracellular biotrophic parasite |
What do all viruses contain? | A protein coat (Capsid) and a nucleic acid |
What is another name for the protein coat of a virus? | Capsid |
What are the subunits of the capsid called? | Capsomeres |
What part of the virus is antigenic? | Capsid/envelope |
What is the classification of viruses, where proteins cover the exposed surfaces of the nucleic acid? (RNA) | Helices |
What is the classification of viruses where the DNA or RNA is surrounded by a protein structure? | Polyhedrons |
What shape is formed in polyhedron viruses? | Icosahedron |
What is an example of complex viruses? | (T2) Bacteriophage |
Attachment, penetration and release do not occur in plant viruses. What do they then rely on? | Vectors |
When the genetic material is incorporated into the genome in the lysogenic cycle, what is it the resulting chromosome called? | Prophage |
What is the process of incorporating new DNA into a host cell genome? | Transduction |
What is the release of the viral chromosome called? | Induction |
When does the induction occur? | Only in harsh environments |
What enzyme do retroviruses contain? | Reverse transcriptase |
What is so special about retroviruses? | They make dsDNA from ssRNA, and incorporate this newly formed DNA into the host genome |