Chapter 10, Problem 4CONQ

As described in Chapter $9$, one bp of DNA is approximately $0.34$ nmin length. A bacterial chromosome is about $4$ million bp in length andis organized into about $100$ loops that are about $40,000$ bp in length.

If it was stretched out linearly, how long (in micrometers) would one loop be?

If a bacterial chromosomal loop is circular, what would be itsdiameter? (Note: Circumference $\text{= πD}$, where D is the diameter of the circle.)

Is the diameter of the circular loop calculated in part B smallenough to fit inside a bacterium? The dimensions of the bacterial cytoplasm, such as E. coli, are roughly $0.5$μm wide and $1.0$μm long.