Final answer:
The sequences described are the Shine-Dalgarno sequences found in prokaryotic mRNA, specifically in E. coli. They are located ten nucleotides upstream from the AUG initiation codon and are complementary to the UCCU core sequence element of E. coli 16S rRNA. The Shine-Dalgarno sequence interacts with the ribosome to anchor the ribosomal subunit during translation.
Step-by-step explanation:
The sequences described in the question are the Shine-Dalgarno sequences. These sequences are found in prokaryotic mRNA, specifically in E. coli. They are located about ten nucleotides upstream from the AUG initiation codon and are complementary to the UCCU core sequence element of E. coli 16S rRNA. The Shine-Dalgarno sequence interacts with the rRNA molecules of the ribosome, anchoring the ribosomal subunit at the correct location on the mRNA template during translation.