1 bp of DNA is approximately 0.34 nm in length. Abacterial chromosome is about 4 million bp in length. Thedimensions of the cytoplasm of a bacterium, such as E. coli, areroughly 0.5 μm wide and 1.0 μm long.A. A microdomain is a loop that contains about 10 kbp of DNA. Ifsuch a loop was stretched out linearly, how long (in micrometers)would the DNA be?B. If a bacterial microdomain was circular, what would be itsdiameter? (Note: Circumference = πD, where D is the diameter ofthe circle.)C. Is the diameter of the circular loop calculated in part B smallenough to fit inside a bacterium?

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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1 bp of DNA is approximately 0.34 nm in length. A
bacterial chromosome is about 4 million bp in length. The
dimensions of the cytoplasm of a bacterium, such as E. coli, are
roughly 0.5 μm wide and 1.0 μm long.
A. A microdomain is a loop that contains about 10 kbp of DNA. If
such a loop was stretched out linearly, how long (in micrometers)
would the DNA be?
B. If a bacterial microdomain was circular, what would be its
diameter? (Note: Circumference = πD, where D is the diameter of
the circle.)
C. Is the diameter of the circular loop calculated in part B small
enough to fit inside a bacterium?

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