Microbiology: An Introduction, 11th Edition

by Tortora, Gerard J.; Funke, Berdell R.; Case, Christine L.

Published by Benjamin Cummings

ISBN 10: 0321733606

ISBN 13: 978-0-32173-360-3

Chapter 8 - Figure 8.21 - The creation and repair of a thymine dimer caused by ultraviolet light - Question - Page 228: 1

Answer

After the addition of nucleotides to the strand, a methyl group is added to them by the methylaze enzyme. The pairs with incorrect bases are not methylated and are removed through excision repair. Absence of a methyl group in a nucleotide is a sign of an incorrect base and excision repair.

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