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CH1, I. Genes are DNA, II. Chemical Characteristics of DNA, III. DNA Size…

- - - - only the DNA is transmitted to the progeny phages produced by infecting bacteria
  - - - virus particle by itself
      - no metabolic activity of its own
      - if virus infects a host cell, the cell begins to make viral proteins
      - viral genes are replicated and newly made genes with viral protein assemble into virus particles
      - in the laboratory, phage DNA can be used to introduce new genetic traits into animal cells or whole animals