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Chapter 9: Problem 3

Distinguish between the locations of the phosphodiester bonds and the hydrogen bonds in a DNA molecule.

Short Answer

Expert verified
In a DNA molecule, phosphodiester bonds create the DNA's backbone, linking the deoxyribose sugars and phosphate groups of each nucleotide together. On the other hand, hydrogen bonds connect complementary base pairs in the center of the molecule, maintaining the double helix structure.

Step by step solution

01

Identify the Location of Phosphodiester Bonds

Phosphodiester bonds exist between the phosphate group and the deoxyribose sugar in the DNA backbone. These covalent bonds form the sugar-phosphate backbone of the DNA, connecting the 3rd carbon atom in the deoxyribose sugar of one nucleotide to the 5th carbon atom in the deoxyribose sugar of the next nucleotide.
02

Identify the Location of Hydrogen Bonds

Hydrogen bonds in a DNA molecule occur between the nitrogenous bases of the two DNA strands. Adenine (A) forms two hydrogen bonds with thymine (T), and Guanine (G) forms three hydrogen bonds with cytosine (C). These bonds hold the two DNA strands together, forming a double helix structure.
03

Distinguish Between Phosphodiester and Hydrogen Bonds

The phosphodiester bonds form a strong structural bond within each individual strand of the DNA, creating the backbone, while the hydrogen bonds create attraction between the two strands of DNA but are weaker, allowing them to be broken and reformed during processes like DNA replication and transcription.

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Most popular questions from this chapter

Is downloading a document from the Internet analogous to replicating DNA? Cite a reason for your answer.

List the components of a nucleotide.

Explain how DNA is a directional molecule in a chemical sense.

What part of the DNA molecule encodes information?

List the steps in DNA replication.
See all solutions

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