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

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Students have asked these similar questions
RNA differs from DNA in that: a) The ribose in RNA nucleotides contains fewer oxygen atoms than does deoxyribose DNA nucleotides. b) It is always single stranded and cannot form base pairs. c) It contains the nucleotide uracil, which pairs with thymine. d) It is single-stranded but can fold into a variety of structures, some of which are double-stranded. e) RNA can only be found in the cytoplasm whereas DNA can only be found in the nucleus.
A) What is the difference between a nucleoside and a nucleotide? B) Give any two differences between DNA and RNA. C) Draw the structure of deoxyribose and ribose below, and number the carbons. What is the difference between the two structures? Please answer all 3 parts
When comparing the structures of RNA and DNA , which of the following statement is True?A-Only RNA contains 3'-deoxyribise rings B-Both RNA and DNA contain 3'-deoxyribise rings C-Only DNA contains 3'- deoxyribise rings D-Neither RNA or DNA contain 3'-deoxyribise rings
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