Cell Structure & Function

Question 1

Describe the plasma membrane

Answer 1

• Selectively permeable (regulates flow of materials)
• Maintains cellular environment
• Barrier: separates cytoplasm from extracellular matrix
• Double layer of phospholipids with embedded proteins

Question 2

Components of Phospholipid Bilayer

Answer 2

• *Bilayer = double layer of phospholipids*
• Phospholipid = phosphate head (hydrophilic) attached to fatty acid tail: (hydrophobic)