That would be catalysts.
Catalysts accelerate (speed up) chemical reactions without damaging itself. They do this by decreasing the activation energy of a chemical reaction.
Enzymes are a type of catalysts.
Answer: It stops getting amino acids when rRNA reaches the termination codon.
Explanation: During initiation stage of translation, the tRNA starts getting amino acids when the rRNA encounters the start codon, AUG. Like translation is terminated when the stop or termination codon is reached. There are three stop codons: UGA, UAA and UAG. These codons do not code for any amino acids.
It probably crawled into the sap when it was still gooey, then got stuck. The sap dried and the bug was still there, and the the tree or whatever rotted away and then it was in the dirt for awhile and then there was an insect in the amber!!