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Concept explainers
Interpretation: To determine the number of moles ATP that is ultimately produced from the entry of 1 mole of FADH2 into the electron transport chain.
Concept introduction: Electron transport chain is a sequence of biochemical reactions in which electrons and hydrogen atoms from the citric acid cycle are transferred to various intermediate carriers and finally reacts with molecular oxygen to form a water molecule. The reaction of the formation of the water is:
There are four complexes associated with the electron transport chain that is present in the inner mitochondrial membrane. The four complexes that help in the electron transfer in the electron transport chain are:
Complex I:
Complex II:
Complex III:
Complex IV:
FADH2 is the reduced form of flavin adenine dinucleotide. The main function of flavin adenine dinucleotide is to act as an oxidizing agent and used by the cell in oxidation reactions like oxidation of fatty acid.
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Chapter 23 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- How many FADH2 molecules will be obtained from the complete oxidation of Myristic acid to CO2 ? A. 13 B. 11 C. 15 D. 17arrow_forwardHow many C02 molecules are produced from the complete oxidation of stearic acid through catabolic pathways? A. 14 B. 16 C. 18 D. 20arrow_forwardThe FADH2 formed during the Krebs cycle enters the electrontransport system at which site?a. NADH dehydrogenase b. complex II c. complex IV d. ATP synthasearrow_forward
- Starting with acetyl-CoA in the mitochondria, how many ATP molecules are needed to synthesize a 14 C fatty acid? A. 3 B. 6 C. 9 D. 12arrow_forwardDuring glycolysis, pyruvate oxidation, and the citric acid cycle, NADH is produced. The citric acid cycle also produces FADH2. What is the purpose of these molecules? a. to produce carbon dioxide to breathe out b. to produce oxygen that is needed for the electron transport chain c. to carry electrons to the electron transport chain d. to provide the ADP and phosphate that are needed to make ATParrow_forwardWhich stage in cellular respiration produces the most ATP? a. Glycolysis c. Krebs cycle b. Pyruvate oxidation d. Electron transportarrow_forward
- How would a ubiquinone inhibitor directly affect the ATP yield? a. By increasing the electron transport rate to a fraction of 1/2 b. By limiting the hydrogen protons pumped to a fraction of 1/4 c. By pumping additional hydrogen protons to a fraction of 1/2 d. By disabling the entire electron transport chain and chemiosmotic systemarrow_forwardGiven 60 glucose molecules available in a muscle fiber to undergo aerobic respiration, how many H+ protons can be pumped by transport proteins if the glycolytic NADH followed the Glycerol Phosphate Shuttle? a. 120 H+ protons b. 240 H+ protons c. 360 H+ protons d. 720 H+ protonsarrow_forwardEach molecule of FADH2 results in the production of how many ATP molecules during aerobic respiration? a. 3 b. 2 c. 4 d. 36arrow_forward
- What fundamental difference sets apart anaerobic respiration from aerobic respiration? a. Anaerobic respiration does not have Krebs Cycle. b. Anaerobic respiration does not have an electron transport chain. c. Anaerobic respiration involves substrate-level phosphorylation only. d. Anaerobic respiration utilizes electronegative compounds such as nitrates as final electron acceptor.arrow_forwardWhich stage of cellular respiration DOES NOT produce NADH? A. oxidative phosphorylation B. pyruvate oxidation C. glycolysis D. Krebs cyclearrow_forwardA mutation has damaged the formation of oxaloacetate. What process will be impaired? a. electron transport chain b. citric acid cycle c. chemiosmosis d. ATP synthasearrow_forward
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