Question

The shine-dalgarno sequence is __________:

a. complementary to sequences found in the 16s rrna.
b. involved in determining the translational start site in eukaryotic mrnas.
c. a conserved sequence in prokaryotic mrnas involved in positioning of the 50s subunit/mrna complex for initiation of translation.
d. complementary to sequences found in the 23s rrna.
e. a conserved sequence in the promoter region that enhances transcription in prokaryotic cells.

Answer 1

The Shine-Dalgarno sequence is complementary to sequences found in the 16S rRNA. It is an important component in prokaryotic translation initiation by aligning the mRNA on the ribosome for correct protein synthesis.

Step-by-step explanation:

The Shine-Dalgarno sequence is: a. Complementary to sequences found in the 16S rRNA.

This sequence is found upstream of the start codon in prokaryotic messenger RNA (mRNA) and plays a critical role in the initiation of protein synthesis.

The Shine-Dalgarno sequence aligns the mRNA on the ribosome by pairing with the complementary region of the 16S rRNA in the small 30S ribosomal subunit.

Through this interaction, the ribosome is positioned correctly to start translation at the start codon.