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- Which of the following enzymes do not catalyze a reaction in the citrate cycle that produces CO2 as a product? Choose one or more: OA. isocitrate dehydrogenase OB. fumarase L C. succinate dehydrogenase O D. succinyl-CoA synthetaseWhich of the following citric acid cycle intermediates is decarboxylated during the operation of the cycle? A. More than one correct response B. No correct response C. Isocitrate D. Succinate E. OxaloacetateWhich of the following statements is true about the citric acid cycle a. The Citric Acid Cycle is an 8-step cycle that produces the most electron carrier molecules throughout the process of cellular respiration. b. In Citric Acid Cycle, both the acetyl group and coenzyme A of Acetyl CoA are combined to oxaloacetate. c. In Citric Acid Cycle, glucose is only partially broken down and there are still remnants of glucose after this process. d. The ATP produced during this process is via oxidative phosphorylation
- Which of the following is the third step of Citric Acid Cycle? Select one: a. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH b. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH e. Succinate is oxidized to become fumarate forming FADH2 f. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) g. Citrate is rearranged to become Isocitrate h. Malate is oxidized to become oxaloacetate forming NADH i. Fumarate is combined with water to become MalateDifferent enzymes that catalyse the same reaction are called O A. isoenzymes O B. holoenzymes O C. cofactors O D. coenzymes O E. agonists Which statement concerning the glycolytic and gluconeogenic pathways is correct? O A. Both are catabolic. O B. Both are anabolic. O C. Gluconeogenesis is catabolic while glycolysis is anabolic. O D. Gluconeogenesis is anabolic while glycolysis is catabolic. O E. Gluconeogenesis occurs in brain and glycolysis occurs in muscle. In lactic acid fermentation, which substance is oxidized and which is oxidized? O A. Lactate is reduced and NAD* is oxidized. OB. Lactate is reduced and pyruvate is oxidized. OC. Pyruvate is reduced and NADH is oxidized. O D. NADH is reduced and pyruvate is oxidized. O E. Lactate is oxidized and NADH is reduced.If the enzyme that catalyzed the reaction that converts pyruvate to acetyl-CoA and carbon dioxide is inhibited: a. the production of ATP would decreases but the production of electron carriers would be unaffected b. the concentration of pyruvate would decrease c. the citric acid cycle will not be affected d. ATP production in the electron transport chain/oxidative phosphorylation will increase e. the concentration of acetyl Co A would decrease
- identify the reactions of the citric acid cycle that provide reducing power for the electron-transport chain a. conversion of succinyl-CoA to succinate b. conversion of fumarate to malate c. conversion of succinate to fumarate d. conversion of malate to oxaloacetateWhich of the following is the second step of Citric Acid Cycle? Select one: a. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH b. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH c. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH d. Malate is oxidized to become oxaloacetate forming NADH e. Fumarate is combined with water to become Malate f. Citrate is rearranged to become Isocitrate g. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Succinate is oxidized to become fumarate forming FADH2Which of the following statements about the TCA cycle is INCORRECT? a. All reactions of the TCA cycle take place in the cytosol. b. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH2. c. The TCA cycle can recover much more energy than homolactic fermentation. d. Under aerobic conditions the TCA cycle is used to oxidize pyruvate. e. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.
- The metabolic function of the pentose phosphate pathway is to: a. generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids. b. provide intermediates for the citric acid cycle c. participate in oxidation-reduction reactions during the formation of H,O d. act as a source of ADP for biosynthesisSteps in oxidative phosphorylation involves all of the following except 11. a. The phosphorylation energy is supplied by ATP metabolism b. Electron transfer chain moves electron from NADH and FADH2 to O2 c. Phosphorylation of ADP to ATP catalyzed by ATP synthase d. Electron do not flow to oxygen unless ATP is needed 12. List factors that can activate glucokinase for glucose metabolism in the liver 13. What are the functions of macromolecules with examples? Write the general balanced equation that shows the catabolism of glucose (GLYCOSLYSIS) to ATPS, carbon dioxide, and water. Include in the equation the formation of ATP from ADP and phosphate and oxygen utilization. 14. 15. What is post-translational processing of proteins and list 3 things that can happen to the proteins synthesized at this stage:Which coenzyme is not a Pyruvate Dehydrogenase Complex (PDH) requirement? O a. thiamine pyrophosphate O b. Coenzyme A O C. NAD+ O d. biotin Oe. FAD