Which of the following refers to the region of RNA responsible for binding ribosomes during prokaryotic translation?
Correct answer: D. Shine-Dalgarno sequence
- A. TATA box
- B. Promoter
- C. Terminator
- D. Shine-Dalgarno sequence
Explanation
The correct answer is D) Shine-Dalgarno sequence. The Shine-Dalgarno sequence is a short RNA sequence found in the mRNA of prokaryotic cells, specifically in the 5' untranslated region (UTR). It is located upstream of the start codon (AUG) that signals the beginning of translation. The Shine-Dalgarno sequence base pairs with the complementary sequence on the 16S rRNA of the small ribosomal subunit during the initiation of translation. This interaction positions the ribosome correctly on the mRNA to start translation. The Shine-Dalgarno sequence is essential for the efficient initiation of translation in prokaryotic cells.
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