Ch 12 Crossword puzzle

1234567891011121314151617181920
Across
  1. 6. A virus that infects bacteria
  2. 9. ______________ occurs when a bacterium takes in a piece of bacterial DNA that is floating free in the environment.
  3. 11. A process in which a virus infects a cell but does not destroy it.
  4. 13. The transfer of genetic information from one bacterium to another
  5. 14. Prokaryotes that can act as decomposers in extreme environments
  6. 17. Many bacteria also have ________ outside their cell walls.
  7. 19. Infectious particles made of a short, circular strand of RNA
  8. 20. A substance that causes disease
Down
  1. 1. Viruses that can force a cell to transcribe its RNA into the cell's DNA
  2. 2. Microscopic organisms
  3. 3. Protein contained in the cell walls of bacteria
  4. 4. A method in which a plasmid replicates and is transferred from one bacterium to another by the use of a pilus
  5. 5. Bacteria that get their energy from dead and decaying matter
  6. 7. The most common form of reproduction in bacteria, which is asexual
  7. 8. Infectious particles made only of abnormal proteins
  8. 10. The poliovirus is __________
  9. 12. A protein described in 1957
  10. 15. The DNA region of bacteria
  11. 16. A virus which claimed the lives of many people in Africa
  12. 18. A carrier of genetic information