4 Written questions
4 Multiple choice questions
- bacterial viruses with a polyhedral head & a helical tail.
- contains only a nucleic acid.
- is the protective outer coat.
- the virus that causes AIDS.
4 True/False questions
Viruses → have nuclei & organelles.
Tobacco virus → consists of a protein coat & a nucleic acid core.
typical virus → causes disease in tobacco plants.
clearcutting of forests → is most closely associated with emerging viruses.