Test Bank for Advanced Nutrition and Human Metabolism.pdf

1. Membrane lipid bilayers consist primarily of ____. a. phospholipids b. cholesterol c. proteins d. saturated fatty acids e. enzymes ANSWER: a 2. Which of the following is a common function of membrane proteins? a. receptors b. detoxifiers c. purifier d. neutron transporter e. storage proteins ANSWER: a 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 ANSWER: b 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 ANSWER: b 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 ANSWER: b 6. How are the carbohydrate moieties of the plasma membrane glycoproteins and glycolipids oriented? : Page 3 a. outwardly, away from the cytoplasmic matrix b. inwardly, toward the lumen c. equally inwardly and outwardly to maintain symmetry d. between the bilayers of the membranes e. interlinked with each on both sides of the membrane ANSWER: b 7. Which of the following describes proteins attached to the membrane through hydrophobic interactions and embedded in the membrane? a. peripheral proteins b. rough endoplasmic reticula c. integral proteins d. Golgi apparatus e. apoproteins ANSWER: c 8. Which structure in the cell provides support and controls the movement of cell organelles? a. endoplasmic reticulum b. mitochondrion c. cytoskeleton d. cytosolic matrix e. nucleus ANSWER: c