Ch 12 Crossword puzzle

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