In order for protein synthesis to begin, which of the following statements reflects the correct sequence of events?

Question

Quizplus · Accepted Answer

Protein synthesis begins with the binding of the small ribosomal subunit to the 5' end of the mRNA. The large subunit then joins, creating the P and A sites where reactions between codons on the mRNA and anticodons on tRNA are stabilized. The initiation codon AUG on the mRNA then base pairs with the anticodon UAC on the initiator tRNA, allowing the large subunit to attach and start protein synthesis. Choice A is incorrect because it reverses the roles of the AUG codon and UAC anticodon. Choice B is incorrect because it describes a step that occurs during elongation, not initiation. Choice D is incorrect because it reverses the roles of the mRNA and tRNA in base pairing.

In Order for Protein Synthesis to Begin, Which of the Following