What characteristic of detergents makes them effective in breaking down cell membranes?

What characteristic of detergents makes them effective in breaking down cell membranes?

• A. They are always hydrophobic
• B. They are amphiphilic
• C. They are acidic
• D. They are basic

Answer: (B)

Detergents are effective in breaking down cell membranes primarily due to their amphiphilic nature. Amphiphilic molecules possess both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions. This dual characteristic allows them to interact with both water and lipid components of cell membranes. When detergents encounter the cell membrane, their hydrophobic tails can insert themselves into the lipid bilayer, while their hydrophilic heads remain in contact with the surrounding aqueous environment. This action disrupts the cohesive forces between the lipids in the membrane, leading to the solubilization of the membrane components and ultimately breaking down the structure of the cell membrane. The other options do not accurately describe the nature of detergents and their mechanism of action. While some detergents might be either acidic or basic, it is their amphiphilic property that is key to their effectiveness in disrupting cell membranes. Hydrophobic molecules alone would not be able to interact effectively with both lipid and aqueous environments, and the absence of hydrophilicity would limit their ability to solubilize membranes.

Detergents are effective in breaking down cell membranes primarily due to their amphiphilic nature. Amphiphilic molecules possess both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions. This dual characteristic allows them to interact with both water and lipid components of cell membranes.

When detergents encounter the cell membrane, their hydrophobic tails can insert themselves into the lipid bilayer, while their hydrophilic heads remain in contact with the surrounding aqueous environment. This action disrupts the cohesive forces between the lipids in the membrane, leading to the solubilization of the membrane components and ultimately breaking down the structure of the cell membrane.

The other options do not accurately describe the nature of detergents and their mechanism of action. While some detergents might be either acidic or basic, it is their amphiphilic property that is key to their effectiveness in disrupting cell membranes. Hydrophobic molecules alone would not be able to interact effectively with both lipid and aqueous environments, and the absence of hydrophilicity would limit their ability to solubilize membranes.