Describe the subcellular structures that found in all bacteria

The subcellular structures found in bacteria are: cell wall, cytoplasmic membrane, cytoplasm, ribosomes, vacuoles, plasmids, nucleoid —circular DNA— and annexes, such as pili, cilia and flagella.

Explanation:

Bacteria are unicellular prokaryotic organisms, characterized by a simple structure, lacking a nucleus and most of the organelles, with a circular DNA molecule that is free in the cytoplasm.

The sub-cellular structures present in the bacetry are

Cell wall, surrounding the plasma membrane, composed of peptidoglycan. Plasma membrane of lipidic nature, which covers and protects the cytoplasm.  It is possible to find in some bacteria two plasma membranes.Cytoplasm, lacking endomebrane system. Nucleoid is not a true nucleus with nuclear membrane, but corresponds to circular DNA that is free in cytoplasm. Plasmids are fragments of DNA that are associated with the nucleoid, useful for the exchange of genetic material with other bacteria. Ribosome, which participate in the synthesis of bacterial proteins.Vacuoles are structures that are responsible for the storage of reserve substances, useful for bacterial metabolism. The structures annexes to bacteria are the pili, cilia and flagella. The pili are small villi present on the bacterial surface and participate in the process of intercellular communication and conjugation in prokaryotes. Cilia and bacteria serve for the mobility of bacteria.

Covalent bond is the correct answer