**Core Concept**
The eukaryotic plasma membrane is a complex structure composed of various lipids and proteins that play crucial roles in maintaining cellular integrity, regulating transport, and facilitating cell signaling. The plasma membrane is a dynamic structure that is constantly undergoing changes in its lipid and protein composition.

**Why the Correct Answer is Right**
The eukaryotic plasma membrane is primarily composed of phospholipids, cholesterol, and proteins. Phospholipids, such as phosphatidylcholine and phosphatidylethanolamine, form the bilayer structure of the plasma membrane. Cholesterol is embedded within this bilayer, helping to maintain its fluidity and stability. Proteins, including integral and peripheral proteins, are embedded within the lipid bilayer or attached to its surface, where they perform various functions such as transport, signaling, and cell-cell interactions.

**Why Each Wrong Option is Incorrect**
* **Option A:** Incorrect because the plasma membrane does contain phospholipids, which are a crucial component of its structure.
* **Option B:** Incorrect because the plasma membrane does contain cholesterol, which plays a vital role in maintaining its fluidity and stability.
* **Option C:** Incorrect because the plasma membrane does contain proteins, which perform various functions such as transport, signaling, and cell-cell interactions.

**Clinical Pearl / High-Yield Fact**
The plasma membrane is a dynamic structure that is constantly undergoing changes in its lipid and protein composition. This dynamic nature of the plasma membrane is essential for maintaining cellular homeostasis and regulating various cellular processes.

**Correct Answer:** D.