WCU PHYS 261 Week 2 Quiz: Ch 4, 5 PDF

WCU PHYS 261 Week 2 Quiz: Ch 4, 5 Study online at https://quizlet.com/_a0mw2t 1. In the aerobic metabolism of glucose, ________ oxygen acts as the final acceptor of electrons. 2. The process of forming mRNA is called transcription 3. Which of the following is the...

WCU PHYS 261 Week 2 Quiz: Ch 4, 5 Study online at https://quizlet.com/_a0mw2t 1. In the aerobic metabolism of glucose, ________ oxygen acts as the final acceptor of electrons. 2. The process of forming mRNA is called transcription 3. Which of the following is the best example of feed- High ATP concentra- back inhibition? tions in the cell inhib- it the action of phos- phofructokinase, the third enzyme of gly- colysis. 4. In the hypothetical chemical reaction A+B ’ C+D, A and B what is/are the reactant(s)? 5. What is the definition of metabolism? It is the total of all the chemical reactions in an organism. 6. Match the membrane protein with its function. ligands bind to these proteins and are A. transfer signals from the extracellular environ- changed by the pro- ment to the cytoplasm of the cell tein B. form cell-to-cell connections C. bind to molecules to facilitate entry to or exit from the cell D. ligands bind to these proteins and are changed by the protein enzymes 7. Match the transport process to its description. facilitated diffusion A. simple diffusion B. facilitated diffusion C. both D. neither a form of mediated transport 1/4  WCU PHYS 261 Week 2 Quiz: Ch 4, 5 Study online at https://quizlet.com/_a0mw2t 8. Aerobic metabolism of glucose requires oxygen and produces more ATP per glucose than anaerobic pathways 9. How many CO2 molecules are produced for each 6 glucose molecule that is catabolized completely by glycolysis, the citric acid cycle, and the electron transport chain? 10. Where does the energy come from to power the From H+ addition of a high-energy phosphate group to an ADP molecule by ATP synthase in the inner mito- chondrial membrane? 11. Which of the following is a key intermediate of glu- acetyl-CoA cose catabolism that enters the citric acid cycle? 12. What is the potential yield of ATP molecules for 3 each FADH2 molecule entering the electron trans- port system? 13. An allosteric modulator binds to a region of the en- zyme other than the active site. 14. In the reaction shown, identify the role of each of products the participants. CO2 + H2O öcarbonicanhydraseöcarbonicanhydrase H2CO3 A. enzyme B. substrate(s) C. product(s) H2CO3 15. When an enzyme's activity is inactivated by heat or denatured a change in pH, the enzyme is said to be 2/4  WCU PHYS 261 Week 2 Quiz: Ch 4, 5 Study online at https://quizlet.com/_a0mw2t 16. In the reaction shown, identify the role of each of enzyme the participants. CO2 + H2O öcarbonicanhydraseöcarbonicanhydrase H2CO3 A. enzyme B. substrate(s) C. product(s) carbonic anhydrase 17. The template strand of DNA serves as a guide for mRNA synthesis. 18. Most enzymes are which type of molecule? protein 19. Which of the following best describes why vitamins Many vitamins are are important in the human body? precursors of coen- zymes such as NAD and FAD, which are necessary for meta- bolic reactions and pathways. 20. For each mitochondrial NADH molecule that moves none of the above through the electron transport system, what is the potential yield of ATP molecules? 21. Enzymes __________. increase the rate of chemical reactions 22. An enzyme that transfers phosphates from ATP to kinase a substrate molecule is a 23. Which type of membrane transporter would be ac- A voltage-gated chan- tivated by a change in ion concentration? nel 24. anticodon 3/4  WCU PHYS 261 Week 2 Quiz: Ch 4, 5 Study online at https://quizlet.com/_a0mw2t The tRNA molecule contains the three-base se- quence that is complementary to a codon is called the 25. Which can serve as substrates for ATP production? glucose, amino acids, and fatty acids 4/4