Biological Science
Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 4, Problem 1TYK

What are the four nitrogenous bases found in RNA?

a. uracil, guanine, cytosine, thymine (U, G, C, T)

b. adenine, guanine, cytosine, thymine (A, G, C, T)

c. adenine, uracil, guanine, cytosine (A, U, G, C)

d. alanine, threonine, glycine, cysteine (A, T, G, C)

Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

The five nitrogenous bases consisting of nitrogen-containing molecule used in the construction of nucleotides. The nucleotides are the building blocks of the nucleic acids like DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). The DNA and the RNA are the genetic material of an organism.

Answer to Problem 1TYK

Correct answer:

Adenine, cytosine, guanine, and uracil (A, C, G, U) are the four nitrogenous bases which are found in the RNA.

Explanation of Solution

Explanation for the correct answer:

Option (c) is given that A, C, G, and U are the nitrogenous bases found in the RNA. Since a group of five nitrogenous bases is utilized in building the nucleotides. The nitrogenous bases include adenine, guanine, cytosine, thymine, and uracil. The nitrogenous bases can be purines or pyrimidines. The adenine and guanine are six-membered nitrogen-containing rings and they fall under the purines. While thymine, uracil, and cytosine are six-membered nitrogen-containing rings and they fall under pyrimidines. Uracil is found in the RNA and complements adenine instead of thymine. Hence, option (c) is correct.

Explanation for incorrect answers:

Option (a) is given that C, G, T, and U (cytosine, guanine, thymine, and uracil) are the nitrogenous bases found in the RNA. Since, in the case of DNA, adenine forms double bonds with thymine. Adenine complements either thymine or uracil. There is no strand that consists of both thymine and uracil. So, it is an incorrect option.

Option (b) is given that A, C, G, and T (adenine, cytosine, guanine, and thymine) are the nitrogenous bases found in the RNA. Since, A, C, G, and T nitrogenous bases are found in the DNA. In RNA, uracil is present in place of thymine. So, it is an incorrect option.

Option (d) is given that alanine, threonine, glycine, and cysteine are the nitrogenous bases found in the RNA. Since, alanine, cysteine, glycine, and threonine are not found as nitrogenous bases in DNA or RNA. These are amino acids that form codons and each amino acid has multiple codons. So, it is an incorrect option.

Hence, options, (a), (b), and (d) are incorrect.

Conclusion

Thus, it can be concluded that the four nitrogenous bases found in RNA are adenine, cytosine, guanine, and uracil (A, C, G, U).

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
You aim to test the hypothesis that the Tbx4 and Tbx5 genes inhibit each other's expression during limb development. With access to chicken embryos and viruses capable of overexpressing Tbx4 and Tbx5, describe an experiment to investigate whether these genes suppress each other's expression in the limb buds. What results would you expect if they do repress each other? What results would you expect if they do not repress each other?
You decide to delete Fgf4 and Fgf8 specifically in the limb bud. Explain why you would not knock out these genes in the entire embryo instead.
You implant an FGF10-coated bead into the anterior flank of a chicken embryo, directly below the level of the wing bud. What is the phenotype of the resulting ectopic limb?  Briefly describe the expected expression domains of 1) Shh, 2) Tbx4, and 3) Tbx5 in the resulting ectopic limb bud.
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Text book image
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Text book image
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Text book image
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
DNA vs RNA (Updated); Author: Amoeba Sisters;https://www.youtube.com/watch?v=JQByjprj_mA;License: Standard youtube license