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The genetic material of a typical bacterium is

  • A.a single linear chromosome bound to histones
  • B.carried entirely on independent plasmids
  • C.a single circular chromosome in the nucleoid
  • D.several linear chromosomes within a nucleus

Answer: C

The nucleoid is a region of the cytoplasm rather than a compartment, since no membrane separates it. Plasmids may be present in addition, but they carry accessory genes such as those for antibiotic resistance rather than the genes essential for life.

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