Correct option is C
The correct answer is: (3) 5 nm
Explanation:
In cell membranes, lipid molecules are arranged as a continuous double layer, forming a structure known as the lipid bilayer. The typical thickness of this bilayer is around 5 nm. This structure is essential for maintaining the integrity and functionality of the membrane in cells.
Information Booster:
The lipid bilayer is composed of two layers of phospholipids.
The hydrophilic heads face the aqueous environment, while the hydrophobic tails face inward.
The 5 nm thickness is typical for biological membranes such as the plasma membrane.
The lipid bilayer plays a crucial role in selective permeability, allowing certain molecules to pass while blocking others.
This thickness is small enough to allow membrane flexibility and fluidity.
The bilayer structure is essential for various cell functions like signal transduction, transport, and energy production.
Additional Information:
Option (1) 20 nm: This is incorrect, as 20 nm is much thicker than the typical lipid bilayer thickness.
Option (2) 50 nm: This is incorrect, as 50 nm is much thicker and does not represent the typical thickness of the lipid bilayer.
Option (4) 1 nm: This is incorrect, as 1 nm is too thin for the lipid bilayer, which requires a certain thickness to maintain its function and integrity.
