GENERAL HISTOLOGY

Detailed explanation-1: -Bacteria are unicellular organisms belonging to the prokaryotic group. They have cytoplasm, ribosomes, and a plasma membrane. No, bacterial cells lack a cell membrane. Instead of a cell membrane, they contain the cell envelope, which is an outer membrane of prokaryotic cells.

Detailed explanation-2: -The cell membrane is surrounded by a cell wall in all bacteria except one group, the Mollicutes, which includes pathogens such as the mycoplasmas. The composition of the cell wall varies among species and is an important character for identifying and classifying bacteria.

Detailed explanation-3: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.

Detailed explanation-4: -The cell types in Bacteria and Archaea are considered as “prokaryotes.” The use of the term prokaryote was first introduced as a result of electron microscope studies showing a shared simple cell structure among bacteria (Stanier & Van Niel 1962).