Choose any/all that apply to the citric acid cycle.
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Choose any/all that apply to the citric acid cycle.
- One complete turn of the cycle generates three molecules of NADH, one molecule of FADH₂ and two molecules of CO2.
- The rate of the citric acid cycle is increased in the presence of ATP.
- The rate of the citric acid cycle is increased in the presence of cyanide, a potent inhibitor of the electron transport chain.
- The oxidation of acetyl CoA provides the energy-rich electrons that are harvested in the citric acid cycle.
- One complete turn of the cycle results in the consumption of one molecule of oxaloacetate.
- The citric acid cycle requires aerobic conditions even though no O₂ is directly consumed in the reactions of the cycle.
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- Complete oxidation of a 16-carbon fatty acid can yield 129 molecules of ATP Study Figure 19.2 and determine how many ATP molecules would be generated if a 16-carbon fatly acid were metabolized solely by the TCA cycle, in the form of S acetyl-CoA molecules.The completion of one cycle of the citric acid cycle oxidizing one acetyl CoA results in net... Group of answer choices 2 ATP produced consumption of 1 molecule of citrate consumption of 1 molecule of oxaloacetate production of 2 CO2 Which of the following is not a component of the citric acid cycle? Group of answer choices Oxaloacetate Succinyl CoA Malate Pyruvate Which of the following enzymes catalyzes an anaplerotic reaction? Group of answer choices citrate synthase pyruvate dehydrogenase complex malate dehydrogenase pyruvate carboxylaseFill in the blanks with the numerical answer only: Number of electrons generated in oxidation of 1 glucose to 2 pyrvuate in glycolysis. Number of electrons generated in the oxidation of 2 pyruvate by pyruvate dehydrogenase complex. Number of electrons generated for complex II in oxidation of 2 acetyl CoA via the TCA Cycle.
- Taking into consideration glycolysis, the pyruvate dehydrogenase complex and the citric acid cycle, how many substrate level phosphorylation events occur from a single molecule of glucose? 6 substrate level phosphorylation events 4 substrate level phosphorylation events 3 substrate level phosphorylation events 2 substrate level phosphorylation events None of the above answers are correctWhich of the following events does not occur during Krebs Cycle? Citrate synthase catalyzers the transfer of an acetyl group from acetyl coenzyme A to oxaloacetate to form citrate. Isocitrate dehydrogenase converts citrate to its isomer isocitrate. A carbon dioxide is released when alpha-ketoglutarate is oxidized to succinyl coenzyme A. The energy released from the conversion of succinyl coenzyme A to succinate is used to transfer a phosphate group to ADP to form ATP. During Krebs Cycle, succinate is oxidized to fumarate which is coupled to the reduction of FAD to FADH2. During electron transport, the electrons from FADH2 are transferred to coenzyme Q. Which of the following catalyzes these reactions? NADH dehydrogenase Succinate dehydrogenase FADH2 hydrogenase NADH hydrogenase reductaseA fatty acid (a long straight-chain carboxylic acid with an even number of carbons) is metabolized to acetylCoA, which can then enter the citric acid cycle to be further metabolized. A fatty acid with an odd number of carbons is metabolized to acetyl-CoA and one equivalent of propionyl-CoA. Propionyl-CoA cannot enter the citric acid cycle. Two coenzyme-requiring enzymes are needed to convert it to succinyl-CoA, a compound that can enter the citric acid cycle. Write the two enzyme-catalyzed reactions and include the names of the required coenzymes.
- Concerning the citric acid cycle (TCA cycle), which of the following statements is false? The TCA cycle generates electron carriers Oxidation of pyruvate in the matrix of the mitochondria produces sixteen total electrons Substrate level phosphorylation in the TCA cycle produces 2 GTP per the oxidation of a single glucose molecule The fate of the carbonyl carbon of acetyl CoAin the TCA cycle is to be lost as CO2 in the second turn Oxygen is required to regenerate electron acceptorsUnder anaerobic conditions, pyruvate will be converted to lactic acid. Why does this occur? To convert NADH to NAD* to feed back into glycolysis To supply the glycolysis reaction glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate with needed electrons in the form of NADH Because lactic acid can be converted to glucose to feed back into glycolysis Because lactic acid is needed to resupply glycolysis with electrons OThe Citric Acid Cycle results in (Choose all that apply) net oxidation of acetyl CoA carbons to two CO2 O three NAD to NADH reductions involving 6 electrons one FADH2 to FAD oxidation involving 2 electrons three NADH to NAD oxidations involving 6 electrons O one FAD to FADH, reduction involving 2 electrons O a substrate level phosphorylation
- List four products of glycolysis. How is pyruvate modified before entering the citric acid cycle? Why is the citric acid cycle called a cycle?There are eight chemical reactions that occur in the citric acid cycle process. The reactions of the citric acid cycle are shown in the figure below. acetyl-coenzyme A 0 CH₂-C-CoA HO-CH Reaction 7 O malate CH₂ CH || CH fumarate FADH₂ Reaction 6 FAD H+ + NADH NAD+ 1,0 H₂C CH₂ CH₂ Reaction 8 succinate ADP 0=C GTP CH₂ oxaloacetate Reaction 5 H-COA GDP ATP H₂O Reaction 1 C Reactions of the Citric Acid Cycle CH₂ CH₂ H-COA 0=C 1 CoA succinyl-CoA H+ HO-C Reaction CO₂ с CH₂ NADH CH₂ citrate Reaction 2 H-COA Reaction 3 CO₂ I CH₂ T CH₂ 0=C NAD+ HO–CH a-ketoglutarate CH, CH isocitrate NAD+ H+ + NADH In chapters 9 and 10, you were introduced to several classes of organic reactions. These classes include esterification, decarboxylation, hydration reactions, dehydration of alcohols, oxidation of alcohols, oxidation of aldehydes, reduction of aldehydes, and reduction of ketones. Find at least one of these reaction classes in the citric acid cycle. List the reaction number and the reaction. Write a…After pyruvate is formed, it must either be converted to another molecule to enter the citric acid cycle and ultimately produce ATP by utilizing the electron-transport chain, or go through alternate pathways to produce NAD Identify the products formed in the pathway of pyruvate and indicate whether NADH+H or NAD are produced under aerobic and anaerobic respiration Drag the appropriate labels to their respective targets. ▸ View Available Hint(s) Reset Help Alcohol (ethanol) Aerobic Respiration Anaerobic Respiration Acetyl coenzyme A Normal cell Yeast Lactate NAD+ produced NADH+H* produced Submit End products NAD*/ NADH+H* Previous Answers Request Answer Group 1 Group 2 Exercising Muscle Lactate Group 2 Group 1 Group 2
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