Cell Membrane The Fluid Mosaic Model

1. The cell membrane is primarily made up of _______. phospholipids phospholipids 2. How many layers of lipids are there in the cell membrane?

3. How are the lipid layers arranged? Hydrophobic Tails 3. How are the lipid layers arranged? Hydrophilic Phosphate Head phospholipids phospholipids Color the Phosphate heads of the lipids – Dark Blue Color the hydrophobic tails of the lipids – Light Blue

Color the Proteins Dark Red Color the channel in the protein Pink Hydrophobic Tails 4. Large molecules called _Proteins___ are found embedded within the membrane. Hydrophilic Phosphate Head phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes Color the Proteins Dark Red Color the channel in the protein Pink

Hydrophobic Tails Hydrophilic Phosphate Head phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes 5. How do membrane proteins prevent certain substances from entering or exiting the cell? Size and shape

Hydrophobic Tails 6. What is the purpose of the carbohydrate on the outer surface of the cell membrane? Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes Color the Oligosaccharide – YELLOW- used for identification of the cell

Glycoproteins – sugars attached to proteins 7. What is the difference in the two carbohydrate on the outer surface of the membrane? Hydrophobic Tails Hydrophilic Phosphate Head Glycoprotein Glycolipid phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes Glycoproteins – sugars attached to proteins Glycolipids – Sugars attached to lipids

Color the Cholesterol Molecules - Orange 8. What is the role of Cholesterol in the membrane? Hydrophobic Tails Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes Color the Cholesterol Molecules - Orange

9. Which part of the proteins are polar? Hydrophobic Tails 9. Which part of the proteins are polar? Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes

10. Which part of the proteins are nonpolar? Hydrophobic Tails 10. Which part of the proteins are nonpolar? Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes

Hydrophobic Tails 11. What is the role of the enzymes that are embedded into the membrane? Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein enzymes

Color the microtubules - Green Hydrophobic Tails Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein Microtubules enzymes Color the microtubules - Green

Hydrophobic Tails Hydrophilic Phosphate Head Glycoprotein Glycolipid Cholesterol phospholipids phospholipids Protein Channel Transport Protein Transport Protein Microtubules Enzymes