Double-stranded DNA is a cylinder that is 20A wide and 3.4A longper base pair. E. coli chromosome is a single double-stranded molecule that is 4.6 million bplong.

An average E. coli cell is a cylinder that is 2 ?m longand 1 ?m in diameter (1 ?m = 10,000 A). Given that thevolume of a cylinder is ?r2h where ? = 3.14, r = radiusof the cylinder and h = height of the cylinder, calculate how muchof the volume of an average E. coli cell is taken up by itschromosome.