Ch.20 vocab

2. a spiral cell
7. chemicals that interfere with life processes in bacteria
9. describes a process that requires oxygen
12. proteins with attached carbohydrate molecules
14. agents that cause disease
15. describes a process that does not require oxygen
18. thick walled protective spore that forms inside a bacterial cell; resists hard conditions
20. short thick outgrowths
21. infectious particle that consists only of a protein and does not contain DNA or RNA

1. cycle in which the viral genome replicates without destroying the host cell
3. the cycle,in bacterial viruses,of viral infection,replication,and cell destruction
4. process in which two organisms exchange genetic material
5. single strand of RNA that has no capsid
6. viruses that infect bacteria
8. gel like layer outside the cell wall and membrane of bacteria
10. a round shaped cell
11. substance produced by an organism and that is poisonous to other organisms
13. segments of nucleic acids contained in a protein coat
16. a rod shaped cell
17. virus protein coat
18. membranelike layer that covers the capsids of some viruses
19. viral DNA that has attached to a host cell's chromosome