The cholera bacterium as an example of a prokaryotic organism. The structure of prokaryotic cells to include cell wall cell-surface membrane, capsule, circular DNA, flagella and plasmid.

The bacterium that causes cholera is a prokaryotic organism as are all bacteria. 

These cells contain fewer organelles than an animal cell, and have some other features.

They have a cell-surface membrane, but they also have a cell wall like a plant: they have another layer outside of this to offer additional protection called a capsual.

The DNA in these cells is not contained within a nucleus- it is just a scrunched up ring called circular DNA.

A flagella helps bacteria move- often associated with sperm cells, but they are also important for cholera bacteria to get through the mucus lining to the epithelial cells in the small intestine.

Plasmids are small sections of DNA that are separate from the main circular DNA and replicate separately from it. They can carry genes that the bacteria didn’t always have and can be transferred between bacterium.