The genome of the bacterium Neisseria gonorrhoeae consists of one double- stranded DNA molecule that contains 2220 kilobase pairs. Calculate the length of this DNA molecule in centimeters. If 85% of this DNA molecule is made up of the open reading frames of genes encoding proteins, and the average protein is 300 amino acids long, how many protein- encoding genes does Neisseria have? What kind of information do you think might be present in the other 15% of the DNA?