Question

Which of the following statements is incorrect regarding the cell membrane?

• A. The fluid mosaic model was proposed to explain the structure of the plasma membrane
• B. Lipids are arranged in a bilayer with hydrophobic heads facing outside and hydrophilic tails towards inside
• C. Proteins are embedded within the lipid layer
• D. The plasma membrane allows only certain molecules to pass through it

Answer 1

The correct option is B Lipids are arranged in a bilayer with hydrophobic heads facing outside and hydrophilic tails towards inside

Fluid mosaic model was proposed to explain the structure of the plasma membrane. This model was proposed by Singer and Nicolson. According to this model, the phospholipids are arranged in a bilayer with their hydrophilic heads facing outside and hydrophobic tails facing towards the inner side. Proteins are embedded within the bilayer. The plasma membrane is a selectively permeable membrane as it allows certain molecules to pass through it on either side of it.