Multiple choice

Which of the following proteins initiates the polypeptide chain?

  1. Glycine

  2. Leucine

  3. Methionine

  4. Lysine

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because methionine amino acid is classified as non polar as it has a straight side chain that possesses a S-methyl thioether (i.e C-S-C bonding) at the gama-carbon. It is an essential amino acid in all metazoa. These are initiated by the polypeptide chain.