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JEE Advanced levelSingle correct optionDifficulty 3 of 3bm102

Molar masses of the free amino acids: glycine 75, alanine 89, serine 105 g/mol (water 18 g/mol). The molar mass of the tripeptide Gly-Ala-Ser is

  1. A269 g/mol
  2. B215 g/mol
  3. C251 g/mol
  4. D233 g/mol

Answer: D

Forming a tripeptide from three amino acids loses 2 water molecules (two peptide bonds). Mass = g/mol.
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