Biological Science (6th Edition)
Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 16, Problem 1TYK
Summary Introduction

Introduction:

A mutation refers to the permanent alteration of the DNA (deoxyribonucleic acid) sequence in an organism. The mutations can occur due to the insertion, deletion, or change in the base-pair of the DNA sequence.

Expert Solution & Answer
Check Mark

Answer to Problem 1TYK

Correct answer:

The change in the base pair during replication process is referred to as a mutation.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (a) is given as a mutation. An alteration in the base-pair of the sequence during the DNA replication is a mutation because it is a permanent change that can affect the whole process of DNA replication. Moreover, it alters codon sequence that leads to formation of nonessential amino acids. Hence, Option (a) is correct.

Explanation for the incorrect answers:

Option (b) is given as mutations that fall in the protein-coding part of the gene. These mutations are known as missense mutations, which also come under mutations only. So, it is an incorrect option.

Option (c) is given as mutation in the transcribed part of the genome. Even, if the mutation does not fall in the protein-coding part or in the transcribed part of the genome, it would still be called as a mutation. So, it is an incorrect option.

Option (d) is given as single base-pair change is not considered as mutation. A change in a single base-pair has the potential to change the whole DNA sequence. Hence, a single base-pair change is also considered as a mutation. So, it is an incorrect option.

Hence, the options (b), (c), and (d) are incorrect.

Conclusion

A mutation is an alteration in the genome. The change in the base-pair of the DNA sequence is always considered as a mutation, no matter where it is present.

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Students have asked these similar questions
Which of the following terms refer to the case when a mutation results in a significant decrease or a complete loss of the functional activity of a gene product? a. gain-of-function mutation   b. loss-of-function mutation
For each statement below indicate whether it is true or false: A. Strand discrimination during the process of DNA repair is based on DNA methylation B. The genetic code has 64 amino acid-specifying codons C. Mutations in germline cells are more consequential to subsequent generations than mutations in somatic cells.
A.) There is no change in the DNA sequence if nucleotides are added or removed, it will have no effect to the cell. B.) Mutations in the DNA sequence are all irreversible. A. Statement A is correct B. Statement B is correct C. Both A and B are correct D. Both A and B are incorrect
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY