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Which organisms are chiefly responsible for degrading lignin in soil?

  • A.Green algae
  • B.White-rot fungi
  • C.Nitrifying bacteria
  • D.Denitrifying bacteria

Answer: B

White-rot fungi secrete peroxidases and laccases able to attack the aromatic rings of lignin, a capability very few organisms possess. The bacteria listed work on nitrogen compounds, and algae photosynthesise rather than decompose.

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