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DATE: DCHAPTER ATE : NAME3: NAME: CLASS: The Fluid-Mosaic Model WORKSHEET DATE : NAME : CLASS: CLASS: BLM 3-7 ANSWERS 1. Label the different parts of the cell membrane (plasma membrane) shown below. A. B. C. D. E. F. G. H. cell membrane (plasma membrane)I. phospholipid J. glycoprotein K. extracellular matrix (ECM) L. glycolipid M. carbohydrate chain N. hydrophobic tails of phospholipid O. phospholipid bilayer hydrophilic heads of phospholipid outside the cell inside the cell filaments of the cytoskeleton integral protein cholesterol peripheral protein 2. Complete the following table by identifying the membrane structure and describing the role of the different components of the cell membrane in the fluid-mosaic model. Labelled Part B Membrane Structure phospholipid C N glycoprotein cholesterol O peripheral protein BC Biology 12 Blackline Master BLM 3-7 Answers: The Fluid-Mosaic Model Role serves as a barrier to keep certain substances out of the cell; provides fluidity helps identify the cell regulates membrane fluidity; supports and strengthens the cell membrane provides support, stability, and shape Copyright © 2013 McGraw-Hill Ryerson Limited 978-1-25-908794-3 DATE: NAME: DCHAPTER ATE : NAME3: CLASS: WORKSHEET DATE : NAME : CLASS: CLASS: BLM 3-7 The Fluid-Mosaic Model ANSWERS (continued) 3. The cell membrane is said to be selectively permeable. What does this mean? The cell membrane will allow only certain molecules to pass through it. 4. Describe the fluid-mosaic model. The cell membrane (plasma membrane) consists of a phospholipid bilayer that has a fluid consistency. Various types of proteins are scattered throughout this phospholipid bilayer. Both the phospholipids and proteins move among each other. The lipid bilayer represents the “fluid” part of the fluid-mosaic model, while the various proteins found embedded in the cell membrane account for the “mosaic” part. 5. Classify the different types of integral proteins and give the function of the protein. Diagram of Protein Type of Integral Protein cell recognition protein Function helps the cell recognize itself A channel protein allows certain molecules to pass through the cell membrane e.g. transports H+ or Cl– receptor protein binds to a specific molecule that fits into its receptor site enzymatic protein involved in metabolic reactions carrier protein transports specific molecules across the cell membrane e.g. transports Na+ or K+ across a nerve cell membrane B C D E BC Biology 12 Blackline Master BLM 3-7 Answers: The Fluid-Mosaic Model Copyright © 2013 McGraw-Hill Ryerson Limited 978-1-25-908794-3