Which molecules compose the majority of the cellular membrane of all cells, and possess both hydrophilic and hydrophobic regions?(1 point)

The majority of the cellular membrane of all cells is composed of **phospholipids**. Phospholipids have both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions, which makes them essential for the structure and function of cellular membranes. Therefore, the correct answer is:

**Phospholipids**