A DNA sequence encoding a five-amino acid polypeptide is given...

Question

A DNA sequence encoding a five-amino acid polypeptide is given below.

...ACGGCAAGATCCCACCCTAATCAGACCGTACCATTCACCTCCT...

...TGCCGTTCTAGGGTGGGATTAGTCTGGCATGGTAAGTGGAGGA...

What is the function of the Shine–Dalgarno sequence?

Accepted Answer

Hey, everyone. Let's take a look at this question together. What is the difference between the Shine Del Garno sequence and the Kozak sequence? Is it answer choice A, the Kozak sequence is a protein translation initiation site in eukaryotic M R N A. Whereas the Shine Del Garno sequence is a ribosome binding site found commonly in bacterial M R N A and rarely in archaic M R N A. Is it an your choice? B, the start codon is present in the Kozak sequence? Whereas the Shine dear sequence is located eight bases upstream of the start codon or is it answer choice C both answer choices A and B are correct or is it answer choice D both answer choices A and B are incorrect. Let's work this problem out together to try to figure out whether answer choice A answer choice B, both answer choices A and B or neither answer choice A or B are correct. Let's start off by talking about what we know about the Shin de Garno sequence, which we know is a ribosome binding site in bacterial and A M R N A. And it is located eight bases upstream from the start codon. And on the other hand, we have the Kozak sequence, which we know the Kozak sequence is a consensus sequence at the translation start site, which means that it contains the start codon since it is found the translation initiation site. So now that we know some key information about both the Shine Del Garno sequence and the Kozak sequence, we can identify some differences between the two. So starting off with answer choice A, it says that the Kozak sequence is a protein translation initiation site in eukaryotic M R N A, which we know that it is a consensus sequence that is found at that translation start site in eukaryotic M R N A. So that statement is true. And on the other hand, the Shin dear sequence or the S D sequence is a ribosome binding site that is found commonly in bacterial M R N A but rarely in Archa M R N A, which we know that the Shine Del Garno sequence is that rhizome binding site found in bacterial and Archa M R N A which it is found commonly in the bacterial M R N A and although rarely found in ARCA M R N A, it is still present. So answer choice A is true about the difference between the two sequences. And then answer choice B says that the start codon is present in the Cosac sequence which we know that the Cosac sequence contains that start codon And the Shine Del Garno sequence is located eight bases upstream of the start CODON, which is also a true statement about the Shine Del Garno sequence. So answer choice A and answer choice B are both true statements about the difference between the two sequences. So answer choice C both answer choice A and answer choice B are correct is the correct answer. Since we know that the Shine De Garno sequence is that ribosome binding site found in bacterial and Archa M R N A located eight bases upstream from the start codon. And on the other hand, the COZ sequence is the consensus sequence found at the translation start site, which is that start code on. So it does contain the start code on and answer choices A and B highlight both of the differences between the two sequences making answer choice C both answer choice A and answer choice B are correct. The correct answer. I hope you found this video to be helpful. Thank you and goodbye.

A DNA sequence encoding a five-amino acid polypeptide is given below.
...ACGGCAAGATCCCACCCTAATCAGACCGTACCATTCACCTCCT...
...TGCCGTTCTAGGGTGGGATTAGTCTGGCATGGTAAGTGGAGGA...
What is the function of the Shine–Dalgarno sequence?

Key Concepts

Shine-Dalgarno Sequence

Translation Initiation

Polypeptide Synthesis

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