Question

1. why do the polypeptides made in prokaryotes always contain formyl methionine as the first amino acid?

the terminator trna adds formyl methionine first.
the initiator trna adds methionine amino acid first.
the initiator trna adds formyl methionine first.
the terminator trna adds methionine amino acid first.

Explanation:

In prokaryotes, the initiator tRNA adds formyl - methionine as the first amino acid during polypeptide synthesis. Terminator tRNA is involved in termination of translation, not in adding the first amino - acid.

Answer:

The initiator tRNA adds formyl methionine first.