Which one forms the continuous part of cell membrane

Options

A. Proteins
B. Carbohydrates
C. Lipids
D. All the above

Answer

To solve the question "Which one forms the continuous part of the cell membrane?", we can follow these steps:

### Step 1: Understand the Structure of the Cell Membrane
The cell membrane, also known as the plasma membrane, is primarily composed of a phospholipid bilayer. This bilayer is crucial for the membrane's structure and function.

**Hint:** Recall that the cell membrane is often described as a "fluid mosaic model" due to its dynamic nature and composition.

### Step 2: Identify the Components of the Cell Membrane
The main components of the cell membrane include:
- **Lipids** (specifically phospholipids)
- **Proteins**
- **Carbohydrates**

**Hint:** Think about the roles of each component in the membrane. Which one provides the structural foundation?

### Step 3: Focus on the Role of Lipids
Among these components, lipids, particularly phospholipids, form the continuous layer of the cell membrane. They arrange themselves into a bilayer with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

**Hint:** Consider the amphiphilic nature of phospholipids and how this characteristic contributes to the formation of a bilayer.

### Step 4: Analyze the Other Components
- **Proteins** are embedded within the lipid bilayer but do not form the continuous part of the membrane.
- **Carbohydrates** are attached to proteins and lipids on the extracellular surface but are not part of the membrane structure itself.

**Hint:** Remember that while proteins and carbohydrates play important roles in membrane function, they do not constitute the continuous layer.

### Step 5: Conclusion
Based on the analysis, the component that forms the continuous part of the cell membrane is **lipids**.

**Final Answer:** The correct option is **C. Lipids**.

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