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Question

The first amino acid in any polypeptide chain of prokaryote is always
  1. Lysine
  2. Methionine
  3. Formylated methionine
  4. Formylated arginine

A
Formylated arginine
B
Lysine
C
Methionine
D
Formylated methionine
Solution
Verified by Toppr

The first amino acid in any polypeptide chain of a prokaryote is always formylated methionine. The first amino acid is methionine in eukaryotes. This is because AUG is a start codon that codes for formylated methionine in prokaryotes and methionine in eukaryotes.
Thus, the correct answer is 'Formylated methionine.'

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