Which of the following is proteinaceous in nature?

  • A
    Polyethylene
  • B
    Silk and wool
  • C
    Cellulose
  • D
    Terylene

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Which of the following pairs of amino acids contains non-polar '$R$' groups?

Which of the two groups of the following formula is involved in peptide bond formation between different amino acids?

Who classified amino acids?

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