Question

A tripeptide contains glycine, alanine, and serine. How many different sequences are possible?

• A. 5
• B. 6
• C. 7
• D. 2

Answer 1

The correct option is B 6

6 different tripeptides can be formed from one molecule each of serine, glycine, and alanine.

1. Ser–Ala–Gly

2. Ala–Ser–Gly

3. Gly–Ala–Ser

4. Ser–Gly–Ala

5. Ala–Gly– Ser and

6. Gly–Ser–Ala