Question

identify structure d. options: glycoprotein, cholesterol, phospholipid bilayer of membrane, protein, extracellular matrix

Explanation:

To identify Structure D, we analyze the cell membrane structure. The cell membrane's basic framework is the phospholipid bilayer, which consists of two layers of phospholipids with hydrophilic heads and hydrophobic tails. Glycoproteins (A) have carbohydrate chains, cholesterol (B) is a steroid in the membrane, proteins (like E, F) are embedded or associated, and extracellular matrix (C) is outside. Structure D matches the phospholipid bilayer's appearance (two - layered, forming the membrane's base).

Answer:

C. phospholipid bilayer of membrane