Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 4 - Nucleic Acids and the RNA World - Review - Page 105: 3

Answer

D

Work Step by Step

The base pairing rule makes sure that A always pairs with T and C always pairs with G. Two hydrogen bonds connect A and T, while three hydrogen bonds link C and G. This pairing helps cells copy genetic information as the DNA replicates and the cell undergoes mitosis. Because of this, complimentary pairing is vital for copying the correct nucleic acids.
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