Answer:
The correct answer to the question: Regarding plasma membranes, which of the following statements is false, would be, B: The thickness of the plasma membrane is only about 1 nm.
Explanation:
The plasma membrane is the structure of the cell that provides a protective barrier, between a cell´s intracellular environment and the extracellular matrix. Furthermore, aside from providing structural support, and protection, a cell´s membrane also serves as a communication media between the cells, and between a cell and all other elements outside of it. This membrance is formed by a phospholipid bilayer, with a space in between the two layers where the tail ends meet and it also has in its structure cholesterol and other lipids that allow the membrane to be fluid, but also structurally strong. However, what is not true is the thickness, as it is known that plasma membranes´ thickness actually lies between 7.5 to 10 nm, and not merely 1 nm. This is why the answer is B.
The statement, that is, the thickness of the plasma membrane is only about 1 nm is incorrect.
The membrane found in all the cells, which separates the cell interior from the external surroundings is known as the plasma membrane or the cell membrane. The prime function of the membrane is to provide structural support and barrier, which forms the boundaries of the cell.
The plasma membrane is considered as lipid bilayer as it comprises two layers of fat cells arranged in two sheets. The thickness of the plasma membrane is generally about 5 nm, and it surrounds all the cells providing the structure to the plasma membrane.
Thus, the incorrect statement is option B.
Find out more information about plasma membrane here:
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