Final answer:
Bacterial cells all contain a plasma membrane, ribosomes, cytoplasm, and nucleoid, but not all bacteria have flagella, pili, fimbriae, a cell wall, or capsule.Therefore, the correct structures found in all bacterial cells as per the options provided are: a) plasma membrane, c) ribosomes, e) nucleoid, and g) cytoplasm
Step-by-step explanation:
Not all bacterial cells have the same structures, but there are some elements that are common to all of them. These essential components include the plasma membrane, which surrounds the cell and offers protection from the outside environment; ribosomes, which are the sites of protein synthesis; the cytoplasm, which contains all the contents of the cell inside the cell membrane except the nucleus in eukaryotic cells; and the nucleoid, which is where the bacterial chromosome (DNA) is located.
Other structures such as flagella, pili (also known as pilus), fimbriae, cell wall, and capsule are not present in all bacterial species. Specifically, flagella are used for motility, pili are involved in attachment and genetic exchange, fimbriae aid in attachment to surfaces, the cell wall provides structural support and protection, and the capsule serves as an additional protective layer in some bacteria.
Therefore, the correct structures found in all bacterial cells as per the options provided are: a) plasma membrane, c) ribosomes, e) nucleoid, and g) cytoplasm. The cell wall (h) is present in almost all bacteria but there are exceptions, such as mycoplasma species that lack a cell wall due to their adaptation to a parasitic lifestyle within other cells.