Louisiana Esthetics State Board Practice Test

Which of the following is NOT a basic part of the cell?

1. Cell membrane

2. Cytoplasm

3. Nucleus

4. Plasma

The correct answer is: Plasma

The distinction here lies in the understanding of cellular structures and their roles. The cell membrane, cytoplasm, and nucleus are all fundamental components of a cell. The cell membrane acts as a protective barrier that regulates what enters and exits the cell. The cytoplasm is the gel-like substance within the cell that contains organelles and is where many metabolic processes occur. The nucleus functions as the control center of the cell, housing the cell's genetic material. In contrast, "plasma" as a term is typically associated with the fluid component of blood, not a part of the cell structure itself. While plasma does play an essential role in the circulatory system, particularly in transporting nutrients, hormones, and waste products, it is not a basic part of the cell. Thus, identifying "plasma" as the option that does not belong in the context of basic cellular components is accurate, reflecting an understanding of cell biology.