What type of bacteria is commonly referred to as "True Bacteria"?

Bacteria that are commonly referred to as "True Bacteria" belong to the group known as Eubacteria. This classification distinguishes them from Archaebacteria, which are a separate group of prokaryotic organisms that have distinct biochemical and genetic characteristics. Eubacteria include a wide variety of bacterial species that are found in many environments, including soil, water, and as part of flora in living organisms.

Eubacteria possess a classic bacterial structure, including a cell wall made of peptidoglycan, which is key in defining this group. They encompass common genera such as Escherichia (e.g., E. coli), Streptococcus, and Bacillus, which can be involved in processes ranging from human gut health to various disease-causing infections.

The other options refer to specific groups or types of bacteria that do not align with the term "True Bacteria." Archaebacteria are distinct from Eubacteria as they often live in extreme environments and have unique metabolic pathways. Mycoplasma refers to a group of bacteria that lack a cell wall, making them distinct from Eubacteria. Actinobacteria is a phylum within Eubacteria, but it does not represent the entirety of true bacteria.