In the Figure Below, Which Label Represents the Shine Delgarno

Question

In the figure below, which label represents the Shine Delgarno site? 
A) A 
B) B 
C) C 
D) D 
E) -35

Accepted Answer

The Shine Delgarno site is a sequence on mRNA that is complementary to a sequence on the 16S rRNA of the small ribosomal subunit in bacteria. It helps in the recognition of the start codon and the correct positioning of the ribosome during translation. In this figure, label B represents the Shine Delgarno site, as it is the sequence that is upstream and complementary to the 16S rRNA. Labels A, C, and D are not related to the Shine Delgarno site, and -35 is a region on the promoter that is recognized by RNA polymerase for transcription initiation.