The DNA sequence below gives the first 12 base pairs of the trans...

Question

The DNA sequence below gives the first 12 base pairs of the transcribed region of a gene, and the template and nontemplate strands of DNA are identified. The transcription start is the thymine nucleotide at the end of the sequence given. Use the diagram to answer the list of questions. Make a copy of the diagram before you begin answering the questions, or have one group member diagram the answers for bacteria and another group member diagram the answers for eukaryotes.

Nontemplate strand ___________TTGCTACGGTCA___________
Template strand ___________AACGATGCCAGT___________

Write the anticipated bacterial consensus sequence(s) in the approximate position(s) on the diagram.

Accepted Answer

Hey, everyone. Let's take a look at this question together in bacteria. The sigma factor is a protein that helps R N A polymerase recognize and bind to promoter regions in DNA to initiate transcription. Which of the following promoter sequences does Sigma factor 70 in E coli bind to during transcription? Is it answer choice. A the prib no box, answer choice B the 35 element, answer choice C the 32 element or answer choice D both answer choices A and B. Let's work this problem out together to try to figure out which of the following promoter sequences does Sigma factor 70 and E coli bind to? So we're talking about bacteria and that Sigma factor 70 in E coli specifically. And so the Sigma factor 70 and E coli binds to two different promoter sequences during transcription. And those two promoter sequences that Sigma factor 70 and E coli binds to is the 10 element which is 10 base pairs upstream of the transcription start site. And it also binds to the element which is 35 base pairs upstream from the transcription start site. So we can see that we have the 35 element. However, we know it also binds to that 10 element, which another name for the 10 element is the prib no box, which is answer choice A. So that means that Sigma Factor 70 in E coli binds to both the prib no box and the 35 element making answer choice D both answer choices A and B are correct. Since we note that Sigma Factor 70 in eli binds to the 10 element, which is also called the prib no box as well as that 35 element. So answer choice, D both answer choices A and B are correct is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing