In the fluid mosaic model of a plasma membrane:
 

1. Upper layer is non-polar and hydrophilic
2. The polar layer is hydrophobic
3. Phospholipids form a bimolecular layer in the middle part
4. Proteins form a middle layer
Subtopic:  Cell Membrane |
 62%
Level 2: 60%+
AIPMT - 2002
Hints

The cell membranes are mainly composed of:

1. Phospholipids

2. Proteins

3. Fats

4. Carbohydrates

Subtopic:  Cell Membrane |
 83%
Level 1: 80%+
AIPMT - 2005
Hints