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In which of the following is the peptidoglycan layer present in large quantity?

  • A.Gram-positive bacteria
  • B.Gram-negative bacteria
  • C.Fungi
  • D.Algae

Answer: A

Correct answer: Gram-positive bacteria

Gram-positive walls are mostly peptidoglycan - many layers, half or more of the wall’s dry weight. Gram-negative walls have a single thin layer under an outer membrane. Fungal and algal walls contain none: they are built of chitin, glucans or cellulose.

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