DNA and RNA are chemically very similar but are distinguished, in...

Question

DNA and RNA are chemically very similar but are distinguished, in large part, by the presence of a 2'-OH group in RNA and a 2'-H group in DNA. Why do you suppose that both DNA and RNA have 3'-OH groups and we do not typically find nucleic acids within cells that have 3'-H groups?

Accepted Answer

Hey everyone, let's take a look at this question together. This covalin bond is formed between two nucleotides that eventually will form the backbone of the D. N. A. So let's recall what we've learned about the backbone of the D. N. A. And try to figure out what covalin bond is formed between those two nucleotides. So we know that when we're talking about the covalin bond between two nucleotides that will form the backbone of the D. N. A. We're talking about that covalin bond between five and phosphate group of one nucleotide and the three and alcohol group of another nuclear type. And so this bond right here is that covalin bond that we're trying to figure out what type of prevalent bond and we know that it is a basso di ester bond or answer choice. The the correct answer because the covalin bond that is formed between the five and phosphate group of one nucleotide and the three end O. H. Group of another nuclear tide is a phosphor diastolic over bond which is answer choice date. And we know that it is not hydrogen bond is hydrogen bonds are the bonds that and that you brand of D. N. A. To get that helical orientation. And we know that it is not an ionic bond because D. N. A negative and to have an ionic bond you need to have opposite charges. And since D. N. A. Is negative we do not have that opposite charge of a positive charge. That we cannot have an ionic bond and then incestuous is incorrect because of like acidic bond. Is the bond that is formed between a nitrogen base, which is that hearing or the pyramid in and the sugar face, which in the case of D. N. A. Is deoxyribonucleic or an RNA. We have those ribose sugar, so it is not like a bond. And the only option here that best represent the covalin bond between the two nucleotides that eventually will form the backbone of the D. N. A. Is answer choice the phosphate ester bond. I hope you found this video to be helpful. Thank you and goodbye.

DNA and RNA are chemically very similar but are distinguished, in large part, by the presence of a 2'-OH group in RNA and a 2'-H group in DNA. Why do you suppose that both DNA and RNA have 3'-OH groups and we do not typically find nucleic acids within cells that have 3'-H groups?

Key Concepts

Nucleotide Structure

3'-OH Group Functionality

Chemical Stability and Reactivity

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