What structure in a bacterial cell controls which substances enter and leave the cell? The cell membrane the cytoplasm the ribosome the flagella

The cell membrane controls passage of substances in/out of the cell

The cell membrane

Explanation:

The cell membrane is the outermost covering of a cell that is semipermeable and thus allows only selective transport of substances across the cell. The cell membrane is responsible for separating the internal contents of a cell from the external environment. The cell membrane is a phospholipid bilayer which has proteins present in it that either embedded deep within it or associated loosely. The cell membrane makes sure that the cell can maintain a constant ionic composition and protects it from the surrounding environment.