Question

The order through which each codon passes, excluding start- and stop-codons MCQ: In translation, what is the order through which each codon passes, excluding start- and stop-codons? a) A site -> P site -> E site b) E site -> A site -> P site c) P site -> A site -> E site d) A site -> E site -> P site

Answer 1

In translation, the order through which each codon passes, excluding start- and stop-codons, is A site -> E site -> P site.

Step-by-step explanation:

In translation, the order through which each codon passes, excluding start- and stop-codons, is as follows:

1. A site: The charged tRNA with the corresponding anticodon enters the A site of the ribosome.
2. P site: The ribosome catalyzes the formation of a peptide bond between the incoming amino acid and the growing polypeptide chain.
3. E site: The deacylated tRNA, which no longer carries an amino acid, exits the ribosome from the E site.

Therefore, the correct answer is option (d) A site -> E site -> P site.

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