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

Question

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

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

Accepted Answer

Hey, everyone. Let's take a look at this question. Together, DNA and R N A are made up of nucleotides that are connected to one another in a chain by chemical bonds known as ester bonds. Which of the following statements about phospho dier bonds is incorrect. Is it answer choice. A? This bond acts as a bridge between the adjacent nucleotides forming a complete strand of DNA. Answer choice B they are the backbone in the nucleic acids as the linkage helps in the formation of the long strands. Answer Choice C, they are formed between the three N phosphate group of one nucleotide and the five end hydroxyl group of the adjacent nucleotide or answer choice D none of the above. Let's work this problem out together to try to figure out which of the following statements about phospho dier bonds is incorrect. So some things that we know about phospho dier bonds is that they are formed between the three end hydroxyl group of one nucleotide and the five end phosphate group of an adjacent nucleotide. And we also know that the bond acts as a bridge between the nucleotides forming a complete strand. And so looking at our answer. Choices, answer choice A says this bond acts as a bridge between the adjacent nucleotides forming a complete strand of DNA, which we know is a true statement about boso dier bonds. So answer choice A is not the correct answer. And answer choice B says that they are the backbones in the nucleic acids as the linkage helps in the formation of the long strands, which we know is also a true statement because DNA and R N A are made up of nucleotides that are connected to one another in a chain by chemical bonds known as ester bonds. So answer choice B is also not the correct answer. And answer choice C says that they are formed between the three end phosphate group of one nucleotide and the five end hydroxyl group of an adjacent nucleotide, which we know is an incorrect statement because it is formed between the three end hydroxyl and the five end phosphate and not the other way around. So that means that answer choice C is an incorrect statement making it the correct answer. Since we note that phospho dier bonds are formed between the three end hydroxyl group of one nucleotide and the five end phosphate group of an adjacent nucleotide. And that the bond acts as a bridge between the nucleotides forming a complete strand. So answer Choice C is the only incorrect statement here about phospho dier bonds making it the correct answer. I hope you found this video to be helpful. Thank you and goodbye.

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

Key Concepts

Covalent Bonds

Noncovalent Bonds

DNA Structure

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