Question

mnemonics are helpful for remembering what happens in each of the ribosomes three trna - binding sites. which three mnemonics below best describe what happens at the e, p, and a sites? select the three best answers. the a site is where an aminoacyl trna, meaning a trna linked to an amino acid - enters the ribosome. the a site is where an auxiliary trna, meaning an extra trna, is held even though it is not needed for translation to continue. the p site represents the process of translation. the p site represents peptide bond formation. the e site is where trnas enter the ribosome. the e site is where trnas exit the ribosome. elongation is a 3 - step sequence that repeats over and over. 1. a trna enters the a site. if its anticodon is complementary to the next codon in the mrna that needs to be translated, the trna binds to the mrna and remains in the a - site. (if the anticodon and codon arent complementary, no binding occurs and the trna leaves the a - site.)

Explanation:

• For the A - site: The A site is where an Aminoacyl tRNA (tRNA linked to an amino acid) enters the ribosome. This is correct as per the process of translation. The second option about the A site (auxiliary tRNA) is incorrect.
• For the P - site: The P site is involved in peptide bond formation. The option about the P site representing the process of translation is too vague.
• For the E - site: The E site is where tRNAs exit the ribosome. The option about tRNAs entering at the E - site is incorrect.

Answer:

• The A site is where an Aminoacyl tRNA, meaning a tRNA linked to an Amino acid - enters the ribosome.
• The P site represents Peptide bond formation.
• The E site is where tRNAs Exit the ribosome.