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Which of the following is not true about peptidoglycan?

  • A.It is a polymer consisting of N-acetyl glucosamine, N-acetyl muramic acid and amino acids (alanine, lysine, etc.)
  • B.It is present in prokaryotic cell wall
  • C.It occurs in the form of a bag shaped macro molecule surrounding the cytoplasm membrane
  • D.None of the above

Answer: D

Correct answer: None of the above

All three statements are correct: peptidoglycan is a polymer of NAG and NAM with short peptide chains; it is found in the prokaryotic cell wall; and the cross-linking makes it a single bag-shaped macromolecule (the sacculus) enclosing the whole cell. Since none of them is untrue, the answer is none of the above.

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