Thayne Sweeten
-Do not have their genetic material enclosed inside a membrane; it is typically one circular chromosome. -Do not have membrane bound organelles. -Do not have DNA associated with histone proteins (special chromosomal proteins found in eukaryotes). -Usually have cell walls containing peptidoglycan -Divide by binary fission | ![]() | |
0.2 to 2.0 micrometers in diameter and 2 to 8 micrometers in length | ||
Round or spherical | ![]() | |
Rod shaped | ![]() | |
bacilli which look like cocci | ||
comma shaped, spiral shaped, or corkscrew shaped | ![]() | |
varies in shape | ![]() | |
Star shaped and square shaped bacteria have recently been discovered. | ||
-Single -Diplococci (pairs) -Streptococci (chains) -Tetrads (packet of four) and sarcinae (packets of eight) -Staphylococci (irregular clusters) | ![]() | |
-Single -Diplobacilli (pairs) | ![]() | |
Coccobacilli (resemble cocci) | ![]() |