Chapter 01: The Cell: A Microcosm of Life Indicate the answer choice that best completes the statement or answers the question. 1. Membrane lipid bilayers consist primarily of ____. a. phospholipids b. cholesterol c. proteins d. saturated fatty acids e. enzymes 2. Which of the following is a common function of membrane proteins? a. receptors b. detoxifiers c. purifier d. neutron transporter e. storage proteins 3. What is the role of cholesterol in plasma membrane structure? a. to produce bile b. to regulate fluidity and permeability c. to reduce stability d. to produce hormones e. to catalyze chemical reactions 4. Which of the following is not a usual function of the cytoskeleton? a. locomotion b. generation of ATP c. structural support d. positioning of organelles e. transfer of DNA and RNA 5. Which cellular component enables signal transmission to various parts of the cell due to interconnections within the cytosol? a. glycoproteins b. microfilaments c. glycolipids d. integral proteins e. nucleic acids 6. How are the carbohydrate moieties of the plasma membrane glycoproteins and glycolipids oriented? a. outwardly, away from the cytoplasmic matrix b. inwardly, toward the lumen c. equally inwardly and outwardly to maintain symmetry