Inquiry into Life
Inquiry into Life
14th Edition
ISBN: 9780073525525
Author: Mader, Sylvia S./
Publisher: McGraw-Hill College
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Chapter 25, Problem F2.6BYB
Summary Introduction

To determine:

The three components of a nucleotide.

Introduction:

The nucleotides are the building blocks of the nucleic acids DNA and RNA. They are used as the genetic material of cell. The nucleotides help in cell signaling and the transport of the energy throughout the cells.

Expert Solution & Answer
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Explanation of Solution

The nucleotides constituting the DNA and RNA are made up of three parts:

I. Nitrogenous Base:

The nitrogenous bases can be categorized into two categories, namely Purines and pyrimidines. The purines are Guanine and Adenine. Cytosine, Uracil and Thymine are the pyrimidines. The bases present in the DNA are adenine (A), thymine (T), guanine (G), and cytosine (C). While in RNA, the bases are adenine (A), thymine (T), uracil (U), and cytosine (C).

II. Pentose Sugar:

The sugar present in DNA is 2'-deoxyribose sugar. In RNA, the sugar present is ribose. Both the ribose and the deoxyribose are 5-carbon sugars.

III. Phosphate Group:

A single phosphate group is present in the nucleotides PO43-. The central atom is the phosphorus atom. One atom of oxygen is connected to the 5-carbon in pentose sugar and also to the phosphorus atom. When the phosphate groups link together to form the chains.

Conclusion

Nucleotides consists of three parts namely the nitrogen base, sugar and phosphate group.

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Chapter 25 Solutions

Inquiry into Life

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DNA vs RNA (Updated); Author: Amoeba Sisters;https://www.youtube.com/watch?v=JQByjprj_mA;License: Standard youtube license