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Chemistry Biomolecules General Single Correct MCQ
Published on: August 13, 2026

When an α -amino acid contains a substituent, there is possibility of optical isomers. For example, L-alanine and D-alanine are two enantiomers. What is the number of all possible linear tripeptides (repetitions of amino acids permitted) that can be formed from the following three amino acids: glycine, L-alanine and D-alanine as the starting materials in the condensation reaction ?

A
3C 2
B
3!
C
8
D
27

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The correct answer is:
D
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