The main fabric of the plasma membrane is built from:

1. A membrane must keep watery fluid on one side apart from watery fluid on the other. 2. Only a molecule with both a water-loving and a water-fearing end can do that. 3. The main fabric of the membrane is composed of amphiphilic phospholipid molecules. 4. Proteins and carbohydrates are the second and third components, not the fabric itself. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 5 'Structure and Function of Plasma Membranes', sections 5.1-5.4_