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