Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 15 - Genes and How They Work - Figure 15.3 - Inquiry Questions: 2

Answer

DNA polymerase needs a proofreading function more than RNA polymerase because DNA is a longer-term, archival copy of information, while RNA is short-lived and frequently replaced.

Work Step by Step

DNA is like a machine to make engine parts and RNA the engine parts (not a perfect analogy, but useful here). If you damage the machine, you will always get bad parts--a disaster. If the machine is OK but a few parts come out badly made, you can throw those away and make proper parts in future.
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