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1 a. Which prokaryotic ribosomal subunit binds the mRNA? b. What is the sequence in the...

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a. Which prokaryotic ribosomal subunit binds the mRNA?

b. What is the sequence in the mRNA called that facilitates this interaction, and where is it located?

c. Which specific component within this particular subunit facilitates binding to the mRNA?

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Answer #1

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a. The 30S prokaryotic ribosomal subunit binds to mRNA.

b. Shine-Dalgarno sequence in the mRNA facilitates the interaction. It is located around the 8 bases upstream of the start codon AUG.

c. The 16S rRNA component of the 30s subunit facilitates binding to the mRNA.

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Answer #2

A. In both prokaryotes and eukaryotes the first step of the initiation stage is the binding of a specific initiator methionyl tRNA and the mRNA to the small ribosomal subunit. The 30S subunit binds to the mRNA template at a purine-rich region (the Shine-Dalgarno sequence) upstream of the AUG initiation codon.

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