The purine? rich Shine?
Dalgarno sequence in prokaryotic mRNA functions to
A) base pair with the A?T rich Pribnow box.
B) bind sigma factor.
C) base pair with transfer RNA.
D) facilitate the initiation of protein synthesis.

Question

Quizplus · Accepted Answer

The Shine-Dalgarno sequence, which is a purine-rich sequence located upstream of the start codon in prokaryotic mRNA, functions in facilitating the initiation of protein synthesis by allowing base pairing with the complementary sequence of 16S rRNA in the small ribosomal subunit. This helps in positioning the ribosome at the correct AUG start codon for the initiation of translation. Therefore, it plays a crucial role in the process of prokaryotic translation.

The Purine? Rich Shine