Explanation:

The given figure is a diagrammatic representation of a bacterial cell. The correct answer is option 'B' because it correctly represents the structure of a bacterial cell.

Structure of Bacterial Cell:

A bacterial cell is a prokaryotic cell that lacks a true nucleus and other membrane-bound organelles. The basic structure of a bacterial cell consists of the following components:

1. Cell Wall: It is a rigid, protective layer that surrounds the cell membrane and provides shape and support to the cell. The cell wall of bacteria is composed of peptidoglycan, a complex molecule made up of amino acids and sugars.

2. Cell Membrane: It is a thin, flexible layer that surrounds the cytoplasm and separates the cell from its environment. It is composed of lipids and proteins and is selectively permeable, allowing only certain substances to enter and exit the cell.

3. Cytoplasm: It is a gel-like substance that fills the cell and contains various enzymes and other molecules required for cellular metabolism and growth.

4. Ribosomes: They are small, spherical structures that are responsible for protein synthesis. They are located in the cytoplasm and are composed of RNA and protein.

5. Nucleoid: It is a region in the cytoplasm that contains the bacterial chromosome, which is a circular DNA molecule that carries the genetic information of the cell.

6. Pili: They are hair-like structures that protrude from the cell surface and are involved in attachment to surfaces and transfer of genetic material between cells.

7. Flagella: They are long, whip-like structures that protrude from the cell surface and are involved in motility.

Conclusion:

Thus, the given diagram correctly represents the structure of a bacterial cell, with all the major components labeled and positioned correctly.