7: Membranes (part 3: The Fluid Mosaic Model) Quizellenj2026-01-13T14:07:01-05:00 Please sign up for the course before taking this quiz. 1. Where might you find a higher concentration of cholesterol in a membrane?1 In an oligosaccharide. In a transmembrane protein. In a lipid raft. In the enzyme Flippase. 2. What keeps transmembrane proteins bound to the membrane?1 They are anchored in by many other proteins. They have a large hydrophilic region in their middle. They have a hydrophobic region in their middle. They have an ionic charge that is attracted to the phospholipid tails. 3. Which layer of the membrane has more phospholipid molecules in it?1 outer layer inner layer 4. “Glyco” is Greek and “sacchar” is Latin for1 "Big" "Sugar" "Protein" "Signal" 5. What process is the enzyme Flippase especially helpful for?1 Ion exchange. Moving lipid rafts. Endocytosis. Sending messages. 6. All transmembrane proteins are integral proteins, but not all integral proteins are transmembrane proteins.1 True False 7. “Oligo” is Greek for:1 few many long short 8. What is the job of the enzyme Flippase?1 turns transmembrane proteins upside down. moves a phospholipid from one side of the bilayer to the other. turns the hydrophobic tails towards the outside of the membrane. takes two phospholipids and has them trade places. 9. When a protein passes all the way through a membrane from one side to the other, it is called a/an1 integral protein lipid raft peripheral protein transmembrane protein 10. Only the cells in your reproductive system have “self” ID tags.1 True False 11. Peripheral proteins1 are embedded in a membrane, but don't go all the way through from one side to the other. are embedded in the membrane, all the way from one side to the other. are the same as integral proteins. don't go inside the membrane. 12. Lipid rafts help proteins that belong together, stay together.1 True False 6: Membranes (part 2: Membrane Transport) 8: Proteins (part 1: Amino acids) Back to: 7: Membranes (part 3: The Fluid Mosaic Model)
