The structure in the cell that controls the movement of substance in and out of...

Explanation

The question is asking about the structure in the cell that regulates the movement of substances in and out of it. The options provided are Cytoplasmic membrane, Nuclear membrane, Cytoplasm, and Protoplasm. Among these options, the correct answer is Cytoplasmic membrane. Now, let's understand what a cytoplasmic membrane is. It is also known as the plasma membrane or cell membrane. It is a thin, semi-permeable membrane that surrounds the cell, separating its internal environment from the external one. The plasma membrane is made up of lipids and proteins, and it plays a vital role in the cellular processes that take place within the cell. The plasma membrane controls the movement of substances into and out of the cell. It allows some substances to pass through it while preventing others from doing so. This process is called selective permeability. The plasma membrane also helps in maintaining the shape of the cell and protecting it from the external environment. In conclusion, the structure in the cell that controls the movement of substances in and out of the cell is the cytoplasmic membrane. It is a thin, semi-permeable membrane that surrounds the cell and plays a vital role in the cellular processes taking place within the cell.