mRNA sequences pass through how many ribosomal subunits during translation?

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Multiple Choice

mRNA sequences pass through how many ribosomal subunits during translation?

Explanation:
Two subunits. During translation the ribosome is made of a small and a large subunit, and the mRNA is threaded through both as it is read and as peptide bonds are formed. The small subunit handles codon recognition with tRNA, then the large subunit catalyzes peptide bond formation, so the mRNA sequence effectively passes through the entire two-subunit complex. This two-subunit arrangement exists in both bacteria (50S and 30S) and eukaryotes (60S and 40S).

Two subunits. During translation the ribosome is made of a small and a large subunit, and the mRNA is threaded through both as it is read and as peptide bonds are formed. The small subunit handles codon recognition with tRNA, then the large subunit catalyzes peptide bond formation, so the mRNA sequence effectively passes through the entire two-subunit complex. This two-subunit arrangement exists in both bacteria (50S and 30S) and eukaryotes (60S and 40S).

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