Nature of Viruses
Across
- 2. Mutation rate is high in viruses because RNA replicases have no ------------ ability
- 3. +ssRNA used for translation to -------- for virion assembly
- 4. Basic capsid shape of most animal viruses
- 7. Difficult to trace phylogeny as virus ------ ---- is limited (2 words)
- 11. Viral capsids come in --- fundamental shapes
- 13. Infectious naked circular RNA molecules
- 14. BC class of dsDNA viruses. some parts single-stranded. Replication: DNA genome → +ssRNA → dsDNA by reverse transcription
- 16. +ssRNA used as new ------- for virus production
- 17. When prions convert proteins to prions these aggregate into ------- and -------
- 21. Type of capsid with 20 equilateral triangular faces & most efficient subunit arrangement (max. internal capacity)
- 22. Complex viruses have ----- symmetry = neither completely helical nor icosahedral
- 23. Names of systematic groups used to classify viruses in descending order from highest to lowest taxon
- 26. BC class of dsRNA virus → RNA replicases transcribe 1 strand to mRNA for translation
- 30. Viruses lack ---------
- 33. Viral genomes do not code for proteins for ---------- and -----------
- 34. Cell or organism types a virus can infect (2 words)
- 35. Viruses generally lack a ----------
- 36. A capsid that is tightly associated with the viral genome
- 37. Giant virus which was originally misidentified as a bacterium
Down
- 1. Naked viruses lack a ----- (2 words)
- 5. Type of capsid found in TMV (rod-like/thread-like)
- 6. BC class of +ssRNA viruses which are transcribed to many -ssRNA & +ssRNA copies in cell
- 8. --------- viruses have greater morphological diversity than naked viruses
- 9. --------- classification classifies viruses by genome replication & expression strategies
- 10. Enzymes which convert RNA genome to RNA strand of opposite polarity or orientation (2 words)
- 12. BC class of dsDNA virus → mRNA with host machinery
- 15. Genes which are expressed first after virus enters host cell, allowing it to take over host cell expression machinery
- 18. Host cells cannot produce RNA from ---
- 19. No. of conventional systematic groups used to classify viruses
- 20. Viruses are --- --- parasites (2 words)
- 24. Viruses lack ---
- 25. Subset of cells targeted by virus (2 words)
- 27. Giant viruses possess genes for ---
- 28. +ssRNA viruses (BC group VI) which must be converted to dsDNA by reverse transcription
- 29. BC class of +ssDNA virus → dsDNA with own enzymes → mRNA with host
- 31. Misfolded versions of normal proteins that are very resistant to degradation
- 32. Viruses cannot --------- on their own