Cell Structure and Function

What is the significance of membrane asymmetry?

• Equal composition on both sides
• Same proteins on both sides
• Random distribution of lipids
• Different functions on either side of the membrane

What is the role of cholesterol in the cell membrane?

• Provides energy to the cell
• Acts as a signaling molecule
• Forms the cell wall
• Maintains membrane fluidity

What process occurs when a vesicle fuses with the plasma membrane and releases its contents?

• Endocytosis
• Osmosis
• Facilitated diffusion
• Exocytosis

What organelle modifies and packages proteins for delivery?

• Nucleus
• Mitochondria
• Ribosomes
• Golgi apparatus

What is the function of the endomembrane system?

• Photosynthesis
• Cell division
• Energy production
• Coordinate activities related to protein and lipid synthesis