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#Question id: 169


 An octapeptide composed of four repeating glycylalanyl units has:

#XL - T Zoology
  1. one free amino group on an alanyl residue.

  2. one free amino group on an alanyl residue and one free carboxyl group on a glycyl residue.

  3. one free amino group on a glycyl residue and one free carboxyl group on an alanyl residue.

  4. two free amino and two free carboxyl groups.


Answer:- Option(s): 3


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