Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 16 - 16.3 - Concept Check - Page 332: 1


A nucleosome is about 10nm in diameter. It consists of 8 histone protein molecules forming two circles stuck together like two halves of an Oreo cookie. The DNA in a nucleosome loops around the protein cookie twice. Nucleosomes look like beads on a string when viewed in the TEM using appropriate staining.

Work Step by Step

All of this can be obtained by reviewing the material on p. 328 in Fig. 16.22.
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