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Translation occurs at the **ribosome**. The codon currently being read sits at the:
AA site
BP site
CE site
DBoth A and P together (during peptide bond formation)
Answer & Solution
Correct answer: D. Both A and P together (during peptide bond formation)
During elongation: incoming aminoacyl-tRNA enters the **A** site (matching its codon). The growing peptide chain on P-site tRNA is transferred to A-site amino acid, forming a peptide bond. Ribosome translocates so that the now-empty tRNA moves to E site (exit), and A becomes P for the next cycle.
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