Ch 12 Crossword puzzle

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