Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. Urry
Publisher: PEARSON
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Chapter 56.4, Problem 3CC

MAKE CONNECTIONS → Mutagens are chemical and physical agents that induce mutations in DNA (see Concept 17.5). How does reduced ozone concentration in the atmosphere increase the likelihood of mutations in various organisms?

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E17. Gene mutagenesis is also used to explore the structure and function of proteins. For example, changes can be made to the coding sequence of a gene to determine how alterations in the amino acid sequence affect the function of a protein. Let's suppose that you are interested in the functional importance of a particular glutamic acid (an amino acid) within a protein you are studying. By site-directed mutagenesis, you make mutant proteins in which this glutamic acid codon has been changed to other codons. You then test the encoded mutant proteins for functionality. The results are as follows: Functionality (%) Normal protein 100 Mutant proteins containing Тугosine Phenylalanine 3 Aspartic acid 94 Glycine From these results, what would you conclude about the functional significance of this glutamic acid within the protein?
MAKE CONNECTIONS Speculate about whether thesame enzyme could methylate both a histone and a DNAbase. (See Concept 5.4.)

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Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY