Which step occurs in the a site of the ribosome during translation?
- an uncharged trna is ejected from this site as the ribosome slides to the next codon.
- an incoming charged trna binds to this site.
- none of the other answer options is correct.
- the trna carrying the growing polypeptide moves to this site as the ribosome slides to the next codon.

B. An incoming charged tRNA binds to this site.

Explanation:

This is part of a process called TRANSLATION, in which mRNA is translated into proteins by the ribosomes, it comprises 3 stages: Initiation, Elongation, and Termination.

The A site is part of the ribosome, which has 1 binding site for mRNA and 3 binding sites for tRNA: A: Aminoacyl or acceptor site; P: Peptidyl; E: Exit, and it´s involved in ELONGATION, where it binds to the Aminoacyl tRNA (charged tRNA), that has the aminoacid that´s going to be added.

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