Across
- 2. the protein covering of a virus's nucleic acid core.
- 4. a lysogenized bacteriophage; a phage that is latently incorporated into the host chromosome instead of undergoing viral replication and lysis
- 5. in virus propagation methods, the clear zone of lysed cells in tissue culture chick embryo membrane that corresponds to area containing viruses.
- 6. the degenerative changes in cells associated with virus infections'
- 7. limitation imposed by the characteristics of the host cell on the type of virus that ca n successfully invade it.
- 10. the process whereby solid and liquid materials are taken into the cell through membrane invagination and engulfment into a vesicle
- 13. a bacterium acquires a new genetic trait due to the presence of genetic material from an infecting phage
- 14. a cytopathic protein associated with the slow-virus spongiform encephalopathies of humans and animals
- 15. the indefinite persistence of bacteriophage DNA in a host without bringing about the production of virions
Down
- 1. a subunit of the virus capsid shaped as a triangle or disc
- 3. process whereby a bacteriophage in the prophage state is activated, begins replication, and enters the lytic cycle
- 8. an elementary virus particle in its complete morphological and thus infectious form. ____ consists of the nucleic acid core surrounded by capsid, which can be enclosed in an envelope
- 9. an infectious agent that, unlike a virion, lacks a capsid and consists of a closed circular RNA molecule. although known viroid are all plants pathogens, it is conceivable that animal versions exist
- 11. mammalian capable of causing malignant tumors
- 12. a multinucleated protoplasmic mass formed by consolidation of individual cells