One strand of a fragment of duplex DNA has the sequence ...

Question

One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.

Is the bond in part (f) a covalent or a noncovalent bond?

Accepted Answer

Hello, everyone and welcome to today's video. So which of the following bonds holds the two chains of DNA together in a DNA double helix. So as answer choice A, we have phospho dier bonds as answer choice B, we have hydrogen bonds and as answer choice C, we have glyco bonds. Finally, as answer choice D we have all of the above. Now remember that these two strands of DNA are going to be connected by a type of interaction. So let's go over each of our answer choices so that we may select the correct interaction. So as answer choice A we have phospho dier bonds. So remember that these phosphor dier bonds are going to support the backbone of the DNA structure, but they're going to be within a strength. These phosphor dier bonds connect the nucleotide together in a single strand with each other. Now, because of that, we're going to be canceling this answer choice out. Then we have C which is glycolic bonds. Now, these glyco bonds just like phospho dier bonds are going to exist within a strand. They don't really interact between strands and they're going to be holding the DNA molecule between. So they're going to be forming the bond between the sugar and they're nitrogen based again within a strand. And because of that, we're going to be canceling it out. Finally, we have B which is hydrogen bonds. Now remember that hyen bonds are going to be for me between nucleotides of different strength. So each nucleotide is going to form a certain number of hydrogen bonds with its complementary nucleotide in the opposite strands. And this is what it is going to be holding the two strands together. So answer choice B hydrogen bonds is going to be the correct answer for this question. I really hope this video helped you and I hope to see you on the next one.

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One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.

Is the bond in part (f) a covalent or a noncovalent bond?

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing

One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.Is the bond in part (f) a covalent or a noncovalent bond?

One strand of a fragment of duplex DNA has the sequence 5'-ATCGACCTGATC-3'.

Is the bond in part (f) a covalent or a noncovalent bond?