Eukaryotic membranes

Definition

Eukaryotic membranes are complex structures composed of a lipid bilayer with embedded proteins, carbohydrates, and cholesterol. They compartmentalize the cell, allowing for specialized functions in different organelles.

5 Must Know Facts For Your Next Test

1. Eukaryotic membranes contain phospholipids that form a bilayer, creating a semi-permeable barrier.
2. Proteins embedded in eukaryotic membranes perform various functions including transport, signaling, and structural support.
3. Cholesterol within the membrane helps to maintain fluidity and stability across various temperatures.
4. Carbohydrates attached to lipids (glycolipids) or proteins (glycoproteins) on the membrane surface play key roles in cell recognition and communication.
5. The endomembrane system includes the nuclear envelope, endoplasmic reticulum, Golgi apparatus, lysosomes, and vesicles.

Review Questions

Related terms

Phospholipid Bilayer: A double layer of phospholipids that forms the core structure of cellular membranes.

Endomembrane System:

A group of interconnected or related membranous organelles within eukaryotic cells responsible for synthesis, packaging, and transport.

Glycoprotein: Proteins with carbohydrate groups attached that play a role in cell-cell interactions.