How many pieces of DNA are in a bacterium?

Answer 1

Agreed! The majority of bacteria have a genome that contains one singular DNA molecule (ex: a chromosome) which consists of having millions of base pairs that are circular.

Answer 2

There is one circular strand (for the most part, there are exceptions) of DNA found in the nucleoid region of bacteria. This one strand contains all of the genes necessary for the bacteria to go through necessary biological processes.