The bacterium EscherichiaBIO coli (or E. coli) is a si nglecelledorganism that lives

Chapter 1, Problem 60

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The bacterium EscherichiaBIO coli (or E. coli) is a si nglecelledorganism that lives inthe gut of healthy humans andanimals. Its body shape can bemodeled as a 2-m-long cylinderwith a I m diameter, andit has a mass of I x I0-12 g.Tts chromosome consists ofa single double-stranded chain of DNA 700 times longer thanits body length. The bacterium moves at a constant speed of20 mis, though not always in the same direction. Answer thefollowing questions about E. coli using SI units (unless speci ficallyrequested otherwise) and co1Tect significant figures.a. What is its length?b. Diameter?c. Mass?d. What is the length of its DNA, in millimeters?e. If the organi sm were to move along a straight path, howmany meters would it travel in one day?

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