Fill in the blank in each of the following statements.

1. Viruses require a   to reproduce.

    
   

2. is a term that means "disease-causing".

    
   

3. The virus reproductive cycle that is harmful to the host cell is the cycle.

    
   

4. Your body produces a protein called that interferes with a virus entering a cell.

    
   

5. Viral infections in are almost impossible to cure.

    
   

6. viruses are not immediately disease causing.

    
   

7. The protein coat of a virus is called the .

    
   

8. Virus enzymes disintegrate a cell to release new viruses in a process called .

    
   

9. By the process of transduction, viruses cause within a host population.

    
   

10. is a single-strand nucleic acid.

     
    

11. An icosahedron has (a number) triangular faces.

     
    

12. viruses have been genetically altered so they are unable to cause disease.