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Which of these is a cocci occurring in single or pairs?

  • A.Diplococci
  • B.Streptococci
  • C.Tetracocci
  • D.
    None of the above

Answer: A

Correct answer: Diplococci

Diplococci divide in one plane and stay attached in pairs - Neisseria and Streptococcus pneumoniae are the familiar examples. Streptococci form chains, tetracocci groups of four, and staphylococci irregular clusters; the pattern follows from the planes of division and whether the cells separate.

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