Question

In fluid mosaic model of plasma membrane:

• A. Upper layer is non-polar and hydrophilic
• B. Polar layer is hydrophobic
• C. Phospholipids form a bimolecular layer in middle part
• D. Proteins form a middle layer

Answer 1

The correct option is C Phospholipids form a bimolecular layer in middle part

In the fluid mosaic model,
The upper and lower phospholipid layers are symmetric. Also, the phospholipid heads are polar (not nonpolar) and hydrophilic.
There are icebergs of proteins are floating in both the layers of the phospholipids. Hence they do not form the middle layer.
The plasma membrane is composed of 2 layers of phospholipids facing each other. Hence they form the middle layer.