World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN: 9781133109655
Author: Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher: Brooks / Cole / Cengage Learning
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Chapter 21, Problem 34A
Interpretation Introduction

Interpretation:

The double-helix structure of DNA, and types of bonding needs to be explained.

Concept introduction:

DNA- deoxyribonucleic acid, it is a genetic material for a cell. Mainly it is found in the nucleus of the cell. It is consisting of a deoxyribose sugar, a phosphate, and nitrogenous bases.

Expert Solution & Answer
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Answer to Problem 34A

The double helix structure of DNA is a complex and twisted ladder-like structure where the deoxy sugar, nitrogenous base, and phosphate group are present.

There are two types of bonding present in the DNA, one is covalent and the other one is hydrogen bonding.

Explanation of Solution

The most acceptable structure of DNA is the Double helix structure. It gives detailed information on the structure of a DNA molecule. There are two strands in a DNA molecule which are twisted with each other and representing a twisted ladder. DNA single-strand has a backbone made of deoxyribose and phosphate groups. The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C).

World of Chemistry, 3rd edition, Chapter 21, Problem 34A

The nitrogenous base is interconnected with hydrogen bonding, and sugar and phosphate groups structure are bonded with a covalent bond.

Conclusion

The DNA double helix polymer of nucleic acid joined together by sugar, a nitrogenous base, and a phosphate group.

The nitrogenous bases of two strands are linked with hydrogen bond and the covalent type of bonding with the complementary base pairing occurs within the chain of each strand of the double helix.

Chapter 21 Solutions

World of Chemistry, 3rd edition

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