Organic Chemistry
Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Chapter 28.SE, Problem 13VC

Identify the following bases, and tell whether each is found in DNA, RNA, or both:

Chapter 28.SE, Problem 13VC, Identify the following bases, and tell whether each is found in DNA, RNA, or both:

Expert Solution
Check Mark
Interpretation Introduction

a)

Interpretation:

To identify the following bases and state whether each lie in DNA, RNA or both.

Concept introduction:

Proteins and biopolymers are made up of amino acids, nucleic acids which are joined together to form a long chain. Nucleic acids are the biopolymers of nucleotides, which is composed of a nucleoside. Each nucleoside is bonded to a phosphate group.

Each nucleoside is composed of an aldopentose sugar linked through its anomeric carbon to the nitrogen atom of a heterocyclic purine or pyrimidine base. RNA contains ribose as a sugar component and DNA contains 29-deoxyribose as a sugar component.

DNA contains four different amine bases: two substituted purines (adenine and guanine) and two substituted pyrimidines (cytosine and thymine). Adenine, guanine, and cytosine also occur in RNA, but thymine is replaced in RNA by a closely related pyrimidine base called uracil.

Answer to Problem 13VC

The base given here is: Guanine (G)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  1

It is found in both DNA and RNA.

Explanation of Solution

In the above diagrams of bases, guanine and cytosine are found in DNA and RNA. Whereas, uracil is found in only RNA. Here the blue atoms are the symbols for nitrogen, red atom represents oxygen, black atom represents carbon and grey atom represnts hydrogen.

Conclusion

The base given here is: Guanine (G)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  2

It is found in both DNA and RNA.

Expert Solution
Check Mark
Interpretation Introduction

b)

Interpretation:

To identify the following bases and state whether each lie in DNA, RNA or both.

Concept introduction:

Proteins and biopolymers are made up of amino acids, nucleic acids which are joined together to form a long chain. Nucleic acids are the biopolymers of nucleotides, which is composed of a nucleoside. Each nucleoside is bonded to a phosphate group.

Each nucleoside is composed of an aldopentose sugar linked through its anomeric carbon to the nitrogen atom of a heterocyclic purine or pyrimidine base. RNA contains ribose as a sugar component and DNA contains 29-deoxyribose as a sugar component.

DNA contains four different amine bases: two substituted purines (adenine and guanine) and two substituted pyrimidines (cytosine and thymine). Adenine, guanine, and cytosine also occur in RNA, but thymine is replaced in RNA by a closely related pyrimidine base called uracil.

Answer to Problem 13VC

The base given here is: Uracil (U)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  3

It is found in RNA.

Explanation of Solution

In the above diagrams of bases, guanine and cytosine are found in DNA and RNA. Whereas, uracil is found in only RNA. Here the blue atoms are the symbols for nitrogen, red atom represents oxygen, black atom represents carbon and grey atom represnts hydrogen.

Conclusion

The base given here is: Uracil (U)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  4

It is found in RNA.

Expert Solution
Check Mark
Interpretation Introduction

c)

Interpretation:

To identify the following bases and state whether each lie in DNA, RNA or both.

Concept introduction:

Proteins and biopolymers are made up of amino acids, nucleic acids which are joined together to form a long chain. Nucleic acids are the biopolymers of nucleotides, which is composed of a nucleoside. Each nucleoside is bonded to a phosphate group.

Each nucleoside is composed of an aldopentose sugar linked through its anomeric carbon to the nitrogen atom of a heterocyclic purine or pyrimidine base. RNA contains ribose as a sugar component and DNA contains 29-deoxyribose as a sugar component.

DNA contains four different amine bases: two substituted purines (adenine and guanine) and two substituted pyrimidines (cytosine and thymine). Adenine, guanine, and cytosine also occur in RNA, but thymine is replaced in RNA by a closely related pyrimidine base called uracil.

Answer to Problem 13VC

The base given here is: Cytosine (C)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  5

It is found in both DNA and RNA.

Explanation of Solution

In the above diagrams of bases, guanine and cytosine are found in DNA and RNA. Whereas, uracil is found in only RNA. Here the blue atoms are the symbols for nitrogen, red atom represents oxygen, black atom represents carbon and grey atom represnts hydrogen.

Conclusion

The base given here is: Cytosine (C)

Organic Chemistry, Chapter 28.SE, Problem 13VC , additional homework tip  6

It is found in both DNA and RNA.

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Students have asked these similar questions
The sequence of a short DNA segment is  ATGGCAATAC. (a) What name do we give to the two ends (terminals) of a DNA molecule? (b) In this segment, which end is which? (c) What would be the sequence of the complementary strand?
(i) Name four bases present in DNA.(ii) Which of them is not present in RNA.(iii) Give the structure of a nucleotide of DNA.
Which statement best explains the chemical differencesbetween DNA and RNA? (a) DNA has two different sugarsin its sugar–phosphate backbone, but RNA only has one.(b) Thymine is one of the DNA bases, whereas RNA’s correspondingbase is thymine minus a methyl group. (c) TheRNA sugar–phosphate backbone contains fewer oxygenatoms than DNA’s backbone. (d) DNA forms double helicesbut RNA cannot.

Chapter 28 Solutions

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Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY