Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 1SQ
Which is not a
a. adenine
b. guanine
c. glutamine
d. thymine
e. cytosine
f. All are in DNA.
Expert Solution & Answer
Summary Introduction
Concept introduction: Nucleotides are building blocks of DNA and RNA. DNA has four nucleotides, namely adenine and guanine (which are purines), and thymine and cytosine (which are pyrimidines).
Answer to Problem 1SQ
Correct answer: Glutamine is not a nucleotide base in the DNA. Therefore, option c. is correct.
Explanation of Solution
Reasons for the correct statement:
Glutamine is a basic amino acid. DNA is made of purines and pyrimidines that are collectively called as nucleotides. Glutamine is neither a purine nor a pyrimidine.
Option c. is given as “glutamine”
As glutamine is an amino acid and not a nucleotide base, option c. is correct.
Reasons for the incorrect statements:
Option a. is given as “adenine”.
Adenine is a purine and a nucleotide base in DNA. Therefore, option a. is incorrect.
Option b. is given as “guanine”.
Guanine is a purine and is a nucleotide base in DNA. Therefore, option b. is incorrect.
Option d. is given as “thymine”.
Thymine is a pyrimidine and is a nucleotide base in DNA. Therefore, option d. is incorrect.
Option e. is given as “cytosine”.
Cytosine is a pyrimidine and is a nucleotide base in DNA. Therefore, option e. is incorrect.
Option f. is given as “All are in DNA”.
Adenine, guanine, cytosine, and thymine are present in DNA, and glutamine is absent in DNA. Therefore, option f. is incorrect.
Hence, options a., b., d., e., and f. are incorrect.
Conclusion
Purines and pyrimidines are the structural units of DNA. The purines are adenine and guanine, and pyrimidines are cytosine and thymine.
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Chapter 8 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 8 - Which is not a nucleotide base in DNA? a. adenine...Ch. 8 - What are the base-pairing rules for DNA? a. A-G,...Ch. 8 - Variation in _____ is the basis of variation in...Ch. 8 - One species' DNA differs from others in its...Ch. 8 - Prob. 5SQCh. 8 - Prob. 6SQCh. 8 - Prob. 7SQCh. 8 - When DNA replication begins, ______. a. the two...Ch. 8 - DNA replication requires _______. a. DNA...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...
Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - HersheyChase Experiments The graph shown in FIGURE...Ch. 8 - Energy that drives the attachment of a nucleotide...Ch. 8 - The phrase "5 prime to 3 prime" refers to the...Ch. 8 - After DNA replication, a eukaryotic chromosome...Ch. 8 - Prob. 13SQCh. 8 - Prob. 14SQCh. 8 - Prob. 15SQCh. 8 - Prob. 1CTCh. 8 - Woolly mammoths have been extinct for about 4,000...Ch. 8 - Xeroderma pigmentosum is an inherited disorder...
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