Chapter 21 Vocab

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Across
  1. 2. unicellular organism that lacks a nucleus
  2. 3. kind of virus that infects bacteria
  3. 6. type of infection in which a virus enters a cell, makes copies of itself, and causes the cell to burst
  4. 7. protein coat surrounding a virus
  5. 9. type of asexual reproduction in which an organism replicates its DNA and divides in half, producing two identical daughter cells
  6. 11. preparation of weakened or killed pathogens used to produce immunity to a disease
  7. 12. bacteriophage DNA that is embedded in the bacterial host's DNA
  8. 13. a group of drugs used to block the growth and reproduction of bacterial pathogens
Down
  1. 1. RNA virus that contains RNA as its genetic information
  2. 4. structure produced by prokaryotes in unfavorable conditions; a thick internal wall that encloses DNA and a portion of the cytoplasm
  3. 5. type of infection in which a virus embeds its DNA into the DNA of the host cell and is replicated along with the host cell's DNA
  4. 7. process in which some prokaryotes exchange genetic information
  5. 8. disease causing agents
  6. 10. particle of proteins, nucleic acids, and sometimes lipids that can replicate only by infecting living cells