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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. Describe the double-helical structure of DNA. What type of bonding occurs within the chain of each strand of the double helix? What type of bonding exists between strands to link them together’?

Interpretation Introduction

Interpretation:

The type of bonding occurs within the chain of each strand of the double helix and between strands to link them together should be determined.

Concept Introduction:

Nitrogenous base get attached with pentose sugar to produce nucleoside. This nucleoside esterified with phosphoric acid to produce nucleotide.

Polynucleic acid such as DNA or RNA produced from polymerization of these nucleotide joined to each other. The nitrogenous bases may be adenine, guanine, cytosine or thymine.

Explanation

Nucleotide is made of nitrogenous base attached with pentose sugar along with phosphoric acid which get esterified while nucleoside only contains nitrogenous base attached with pentose sugar.

These nucleotides joined to produce polynucleic acid such as DNA or RNA. The nitrogenous bases may be adenine, guanine, cytosine or thymine.

Thus, the backbone of DNA consists of deoxyribose sugar and phosphate group.

The bases present between the strand are joined to stabilize the helix. Adenine having 2 hydrogen bonds with thymine while guanine having 3 hydrogen bonds with cytosine...

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