Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 12, DNA - 12.3 - DNA Replication - 12.3 Assessment - Page 353: 2a


Prokaryotic DNA is found in the nucleoid region and plasmids. Eukaryotic DNA is found in the nucleus, mitochondria, and chloroplast.

Work Step by Step

Prokaryotes do not have a nucleus, so their DNA is found in the nucleoid region not protected by a membrane such as a nucleus. Prokaryotes may also have plasmids, extra DNA that is not needed for survival but which may provide traits such as antibiotic immunity. Eukaryotes have most of their DNA in the nucleus, although the entire genome also includes bacteria found inside the mitochondria and chloroplast. The DNA in these organelles are explained by the theory of endosymbiosis.
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