8. Which of the following is commonly known as the Complex II of the electron transport system of mitochondria? a. NADH dehydrogenase b. succinate dehydrogenase c. cytochrome c reductase d. cytochrome c oxidase
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- 1. Choose all the correct answers. Enzyme catalyzing this reaction: COO CO0 но C-H + NAD* CH2 + NADH + H* CH2 лвенный тет CoO COO L-Malate Oxaloacetate A. Belongs to the class of transferases. B. Belongs to the class of oxidoreductases. C. Is a simple enzyme. D. Is a holoenzyme.During ETS, terminal electron acceptor finally receives electrons from a.Succinate dehydrogenase b.Cytochrome C-oxidase c.NADH dehydrogenase d.Complex III1. The enzyme that catalyzes the transformation of C2H2 + H2 to C2H4 is likely to be classified as2. The enzyme that catalyzes the conversion of glucose + ATP to glucose-6-phosphate + ADP is likely to be classified asa. Isomeraseb. Ligasec. Transferased. Lyasee. Hydrolasef. Oxidoreductase
- In which of the given steps of TCA cycle one C is lost from substrate in the form of CO2 as well as a molecule of NAD+ is reduced? a.Oxalosuccinic acid to a-ketoglutaric acid b.Isocitrate to oxalosuccinic acid c.Malic acid to oxaloacetic acid d.a-ketoglutaric acid to succinyl CoA1. True / False: NADH dehydrogenase is the least electronegative complex of the ETC. 2. True / False: Most of the energy lost during the conversion of one form to another is as light. 3. True / False: The addition of a phosphate group is called phosphorylation. 4. True / False: The ETC pumps protons into the mitochondrial matrix. 5. True / False: FADH₂ transfers its electrons directly to cytochrome c. 6. True / False: FADH₂ is created exclusively during the citric acid cycle. 7. True/False: Alcohol fermentation occurs most commonly in animals and plants. 8. True / False: During fermentation, NAD* is regenerated when NADH is reduced. 9. True / False: The hydrolysis of ATP releases free energy. 10. True / False: Most of the CO₂ produced by cellular respiration is formed during ETC/chemiosmosis.1. Label each statement about citric acid cycle as true or false and state why you say so. a. The citric acid cycle is a cyclic metabolic pathway that involves eight steps. b. Four molecules of NADH and one molecule of FADH2 are formed in the cycle. c. The cycle is activated when the amount of available ATP is low and energy demands are high. d. The cycle is inhibited when the concentration of NADH is low.
- 4. Which of the following is responsible for initially receiving electrons from glycolysis upon entering the mitochondria with respect to the G-3-P shuttle system? succinate dehydrogenase triose-phosphate dehydrogenase cytochrome-C oxidase cytochrome reductase1. Under aerobic catabolism of glucose, in which compartment of the eukaryotic cell does the following reactions occur? a. Conversion of pyruvate to acetyl CoA. b. Conversion of succinyl-CoA to succinate c. Conversion of NADH to ATP d. Conversion of phosphoglycerate to phosphoenolpyruvate 2. Describe various mechanisms for regulation of blood glucose. 3. Give an account of β – oxidation of saturated even carbon fatty acid (Palmitic acid) along with the total ATPs obtained.1. To enter the citric acid cycle, glucose must be transformed into:A. pyruvic acidB. acetyl-CoAC. ATPD. NADH 2. Which of the following defines glycogenesis?A. process of glycogen formationB. joining of glucose moleculesC. catabolism of glycogenD. both A and B
- Which of the following statements about the TCA cycle is INCORRECT? O a. The TCA cycle can recover much more energy than homolactic fermentation. b. All reactions of the TCA cycle take place in the mitochondria. C. The energy released in the TCA cycle is mainly stored in the reduced electron carriers NADH and FADH₂. O d. Under anaerobic conditions the TCA cycle is used to oxidize pyruvate. Oe. The TCA cycle is also called the citric acid cycle after the product of the first reaction catalyzed by pyruvate dehydrogenase.Which of the following dehydrogenases delivers electrons to directly to UQ in the electron transport pathway from the intermembrane space side of the inner mitochondrial membrane? a. succinate dehydrogenase b. acyl CoA dehydrogenase c. creatine kinase dehydrogenase d. glycerol-3-phosphate dehydrogenase1. Label each statement about citric acid cycle as true or false. a. The citric acid cycle is a cyclic metabolic pathway that involves eight steps. b. Four molecules of NADH and one molecule of FADH2 are formed in the cycle. c. The cycle is activated when the amount of available ATP is low and energy demands are high. d. The cycle is inhibited when the concentration of NADH is low.