Table C contains DNA-sequence information compiled by Ma...

Question

Table C contains DNA-sequence information compiled by Marilyn Kozak (1987). The data consist of the percentage of A, C, G, and T at each position among the 12 nucleotides preceding the start codon in 699 genes from various vertebrate species and at the first nucleotide after the start codon. (The start codon occupies positions to and the first nucleotide immediately after the start codon occupies position ) Use the data to determine the consensus sequence for the 13 nucleotides ( to and ) surrounding the start codon in vertebrate genes. <>

Accepted Answer

Hello everyone. And welcome to today's video cir consensus sequences are DNA or RN A sequences that represent the most common or typical nucleotide at each position within a group of related sequences. How is a consensus sequence identified? So as answer choice A we have by sequencing the genome of a single organism as answer choice B, we have by comparing multiple DNA sequences from different organisms. As answer choice C we have by randomly generating sequences using a computer algorithm. And as answer choice D we have by comparing the protein products from different organisms. Now, since we're creating this consensus sequence, this is going to be sequences that are just common or typical among different species or different organisms. So the best way to identify these common sequences among different organisms is by comparing or just sequencing multiple DNA sequences from these organisms so that we may find which ones are common among them. Now let's go over each of our answer choices so that we may solve this problem first, we have a which we said it was by sequencing the genome of a single organism. This is not going to allow us to compare. So we're going to cancel it out. Then we have by randomly generating sequences using a computer algorithm. Well, this question uh statement or this answer statement is not telling us that we're going to compare these sequences or what we're going to do with them. So we're going to cancel it out. Then we have d by comparing the protein products from different organisms. We're comparing the protein products could be useful but a protein can be made up of many different amino acids or from many or it can come from many different DNA nucleotides. So comparing the protein product is going to be too general. It is not going to be as, as specific as we needed to determine these consensus sequences. So we're going to cancel it out. Finally, we have B which is by comparing multiple DNA sequences from different organisms. And this is exactly what we wrote down here. This is going to allow us to compare because we're using multiple organisms. And by comparing these multiple DNA sequences, we could hopefully find which ones they have in common. So answer choice B is going to be the final answer to a question which states by comparing multiple DNA sequences from different organisms. I really hope this helped you and I hope to see you on the next one.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing