Protein Synthesis · Botany

Which site on the ribosome is where the incoming aminoacyl-tRNA first binds?

  1. P-site (Peptidyl-tRNA site)
  2. E-site (Exit site)
  3. S-site (Signal site)
  4. A-site (Aminoacyl site)
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Correct answer: A-site (Aminoacyl site)

The A-site is the point of entry for the aminoacyl-tRNA, except for the initiator tRNA which binds directly to the P-site. The A-site checks the codon-anticodon match before peptide bond formation.

Difficulty: Medium Question 8 of 20

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