The Structure of Bacteria 

Most bacterium have a ridgid cell wall with a thin and rubbery cell membrane surrounding the cytoplasm inside of the cell. It contains DNA in its' chromosomes. The extra parts of the DNA can be found in the cytoplasm. The ribosomes  are an essential part in the process of copying the DNA.  Bacteria has three main important features, the cell shape, cell wall structure , and motility.   There are three different basic shapes of bacteria cells. It can be spherical, rod-shaped, or spiral shaped.  The wall  helps protect the cell and maintain its shape. Most bacteria have a cell wall that is outside of their plasma membrane. The two main cell walls of bacteria are Gram-positive bacterium and Gram-negative bacterium.  Almost all motile bacteria has flagellum. It is found in the plasma membrane in the cell walls of bacteria. Bacteria uses flagella to move around. It can also move around by producing a big layer of slime to glide around.  Most bacteria have structures called pili , which helps bacteria stick to each other.

Unfamiliar Words 

DNA-  also know as  deoxyribonucleic acid is  genetic information found in the nucleus of a cell. 
Chromosomes- part of the cell that carries the genes.
Cytoplasm- everything inside of the cell membrane.
Ribosomes- found in cytoplasm and play a big role in protein synthesis. 
Cell Wall Structure -  helps maintain the shape of  the cell and protect it. The two types of cell walls are gram-positive and gram-negative bacteria. 
Gram-positive bacterium -  almost  made up of peptidoglycan. 
Gram-negative bacterium - has less petidoglycan and another membrane. 
Motility- the ability to move. 
Flagella- found in the plasma membrane of the cell wall it can be all over the cells surface or on one or both ends. 
Pili- helps bacteria stick to one another.