Bacteria cells have no nuclei. They do have something similar to a nucleus with is called a nucleoid which kind of like a simpler version of a nucleus. It still contains DNA but has less complicated parts to it than a nucleus does. Nucleoids are also spread out through the cell versus a nucleus which is more contained in the cell. Bacteria is prokaryotic which means that they do not have a nucleus or other specialized organelles. They have a cell membrane which basically keeps everything in, kind of like our skin. They can definitely reproduce, thats why we get sick and have to take antibiotics that help to stop their reproduction. And they have 'means of locomotion' which basically means that they can move around. They move through their pili and flagella.