Fall05mid02 - BIOS 100 11am EXAM 2 Name 1 One mole of...

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BIOS 100 11am EXAM 2. October 14, 2005 Name___________________ 1. One mole of glucose can yield about how many moles of ATP via aerobic respiration? A. 2 B. 7 C. 30 D. 96 2. Glucose contains about 686 kcal that are released when it is completely oxidized to CO2 and H2O. So theoretically, it might be possible to make approximately how many ATP molecules from a molecule of glucose? ( think, how many kcal are in an ATP molecule) A. 14 B. 30 C. 100 D. 250 3. The energy given up by electrons as they move through the electron transport chain is used to: A. break down glucose B. make NADH and FADH2 C. pump H+ through a membrane D. split water E. manufacture glucose For #4 - #9, Use the key: A. phosphofructokinase B. Hexokinase C. ATPsynthase D. Ribulose bisphospahte carboxylase (rubisco) E. Pyruvate dehydrogenase 4. catalyzes the addition of phosphate to ADP, and is powered by flow of H+ thru membrane. 5. catalyzes the addition of phosphate to glucose 6. fixes CO2, by adding it to a 5-carbon molecule 7. is a control point in glycolysis, inhibited allosterically by ATP 8. results in formation of acetyl-CoA , CO2 and NADH 9. is found in the inner membrane of the mitochondria as well as in the thylakoid membranes of chloroplasts. 10. What is the electron carrier that functions in the Krebs cycle? A. NAD+ only B. both NAD+ and FAD C. the electron transport chain D. FAD only 11. Following glycolysis and the Krebs cycle ( and before stage IV has occurred), the carbon skeleton of glucose has been broken down ( oxidized) to CO2. Most of the energy is in the form of: A. ATP B. CO2 C. H2O D. High energy electrons transferred to electron carriers 12. Which of the following is NOT a function of the Krebs cycle? A. production of NADH B. release of CO2 C. production of pyruvate D. production of ATP
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13. How many molecules of CO2 are generated from each molecule of pyruvate introduced into the mitochondria? A. 1 B. 2 C. 3 D. 4 E. 5 14. When does feedback inhibition occur? A. when lack of an appropriate electron acceptor makes the electron transport chain stop B. when an enzyme that is active early on a metabolic pathway is slowed down or stopped by a product of the pathway C. when ATP synthase reverses and begins pumping protons out of the mitochondrial matrix D. when cellular respiration stops and fermentation begins 15. When you are exercising and you begin to ‘burn’ fat, which of the following is happening? A. fats are being broken down by beta-oxidation and converted to AcetylCoA B. fats are converted to glucose that enters glycolysis C. fats are converted to protein by deamination D. fats are converted to glucose that enters the Krebs cycle E. Any of these could be happening 16. In the absence of O2, in a very active muscle: A.  electrons are removed from NADH (to make NAD+) in the process of converting pyruvate to  lactate B.  alcohol is produced by bacteria that inhabit the muscle cell C.  ATP builds up and feeds back to inhibit phosphofructokinase
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Fall05mid02 - BIOS 100 11am EXAM 2 Name 1 One mole of...

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