Test Bank For Advanced Nutrition and Human Metabolism, 7e Sareen Gropper, Jack Smith, Timothy Carr

Test Bank For Advanced Nutrition and Human Metabolism, 7e Sareen Gropper, Jack Smith, Timothy Carr-1. Most of the metabolic energy produced in cells is made in the mitochondria. a. True b. False 2. An increase in the concentration of a substrate will increase the rate of the enzyme-catalyzed reaction. a. True b. False 3. Polysomes function to transcribe mRNA into proteins. a. True b. False 4. If two enzymes (e.g., pyruvate dehydrogenase and pyruvate carboxylase) compete for the same substrate (pyruvate), the one with the higher Km has less affinity and will be more active when pyruvate concentrations are high. a. True b. False 5. Transcription of DNA cannot be altered. a. True b. False 6. The nuclear envelope is a single membrane structure that helps to isolate the nucleus from the rest of the cell. a. True b. False 7. The lipid bilayer determines the function of the plasma membrane, while the proteins are primarily responsible for the structure of the membrane. a. True b. False 8. When discussing enzyme kinetics, Km refers to the substrate concentration at which the enzyme is saturated and functioning at maximal velocity. a. True b. False 9. Peripheral proteins are involved in cell-cell recognition, whereas integral proteins function primarily as receptors/transporters. a. True b. False 10. The various components within a cell (e.g., mitochondria) are not “free-floating” in the cytosol, but rather, are held in place by the cytoskeleton. a. True b. False Name: Class: Date: Chapter_01_The_Cell A_Microcosm_of_Life 11. Different cells express different proteins because they contain different sequences of DNA in the nucleus. a. True b. False 12. Oncosis results from cell injury and is associated with cellular swelling and swelling of the mitochondrial nucleus. a. True b. False 13. Allosteric regulation of enzymes is carried out by modulators, other proteins that bind to the enzyme to inhibit its activity. a. True b. False 14. Most cellular reactions are irreversible because the same enzyme that catalyzes the conversion cannot catalyze the reverse reaction. a. True b. False 15. The plasma membrane is a sheet-like structure composed solely of lipids. a. True b. False Indicate the answer choice that best completes the statement or answers the question.