In preparation for attachment to the tRNA, amino acids are activated by:
A) methylation.
B) adenylation.
C) dimethylation.
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

Amino acids are activated by adenylation, in which an adenosine monophosphate (AMP) molecule is added to the carboxyl group of the amino acid, forming an aminoacyl-AMP intermediate. This intermediate then reacts with the 3' end of the appropriate tRNA molecule to form an aminoacyl-tRNA, which can then be used in protein synthesis. Methylation and dimethylation are modifications that can occur to nucleotides in tRNA, but do not play a role in the activation of amino acids.

In Preparation for Attachment to the TRNA, Amino Acids Are