What metabolic products are formed from pyruvate in each case: a) anaerobic conditions in the body b) anaerobic conditions in yeast c) aerobic conditions
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- What
metabolic products are formed from pyruvate in each case: - a) anaerobic conditions in the body
- b) anaerobic conditions in yeast
- c) aerobic conditions
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- two of the reduced electron carriers in the citric acid cycle come directly from a) isomerization of citrate b) lactic acid fermentation under anaerobic conditions c) condensation of acetate to form long-chain fatty acid d) oxidative decarboxylations e) succinate dehydrogenase reactionWhich of the following is true of the steps of glycolysis which yield pyruvate as the end product? a) They all occur in the cytoplasm. b) They all occur in the mitochondria. c) They occur primarily in the mitochondria. d) They occur primarily in the cytoplasm.10) The glycerol phosphate shuttle functions in. A) Lipid catabolism C) Anaerobic glycolysis for the regeneration of NAD 8) Triglyceride synthesis D) Aerobic glycolysis to transport NAH equivalents resulting from glycolysis into mitochondria. 11) In muscles, the pyruvate is converted into lactate. Find the correct statement A) During lactate formation, NADH is reconverted into NAD B) During the product of lactate two AT are produced C) Lactate is the substrate from the downstream pathway D) Lactate acts as the substrate for the formation of amino acid 12) Which of the following regulates lipolysis in adipocytes A) Activation of fatty acid synthesis mediated by CAMP 8) Glycerol phosphorylation to prevent futile esterification of fatty acids C) Activation of triglyceride lipase as a result of hormone stimulated increases in cAMP levels D) Activation of cAMP production by Insulin 13) Glycolysis consists of three irreversible steps. Which of the following enzyme catalyzes the reaction are…
- 11 Which metabolic pathway is common to both cellular respiration and fermentation? There might be more than one answer A)the oxidation of pyruvate to acetyl CoA B)glycolysis C)the citric acid cycle D)oxidative phosphorylation E)chemiosmosisDuring the metabolism of glucose in anaerobic cells, the enzyme lactate dehydrogenase is essential to allow glycolysis to continue. This enzyme catalyzes the reduction of pyruvate to lactate. Why is this so essential? OA) It lowers the pH. B) It re-oxidizes NADH to NAD+. C) Lactate stimulates hexokinase activity. D) Pyruvate inhibits pyruvate kinase.Concerning the use of pyruvate when ratio of NADH/NAD+ is low, what is the fate of the carbon labeled in pyruvate when metabolized under these conditions? a) Production of glucose b) Oxidation to CO2 via the TCA cycle c) Conversion to pyruvate to generate oxaloacetate to move electrons to the cytosol via the malate shuttle d) Pyruvate is never metabolized by the cell, instead pyruvate is converted to lactate and solely exported for the Cori cycle and dependent on the liver to recycle the carbon skeleton
- Which coenzyme is most often used in dehydrogenation reactions of the type –CH2CH2- = -CH=CH- ? a) NAD b) FAD c) NADP d) FMN Which one of these transports fructose? A) GLUT-2 b) GLUT-3 c) GLUT-4 d) GLUT-5 The pyruvate dehydrogenase complex converts pyruvate to which molecule? A) oxaloacetate b) glycogen c) acetyl-CoA d) citrate The pyruvate dehydrogenase complex produces how many ATP molecules at the substrate level? A) 0 b) 1 c) 3 d) 4 The pyruvate dehydrogenase complex produces how many ATP molecules indirectly via oxidative phosphorylation per glucose molecule? A) 1 b) 3 c) 5 d) over 30Which of the following do cellular respiration and fermentation have in common? There might be more than one answer.  A) Both of these pathways provide a mechanism for oxidation of glucose B) The citric acid cycle is involved in both of these pathways C) Enzymes are involved in both of these pathways D)ATP synthase is required to complete both of these pathways E)Both of these pathways occur within mitochondria F) ATP is generated in both of these pathways .The major control enzyme in glycolysis is: a) hexokinase b) phosphofructokinase c) aldolase d) pyruvate kinase In step 4, when fructose-1,6-biphosphate is cleaved, the two molecules formed are: a) GAP and DHAP b) GAP and 3-PG c) 3-PG and 2-PG d) PEP and pyruvate NAD is used in which step? A) conversion of DHAP to GAP b) conversion of GAP to 1,3-BPG c) conversion of 1,3-BPG to 3-PG d) conversion of PEP to pyrunate The number of ATP molecules formed at the substrate level in glycolysis is: a) 1 B) 2 c) 3 d) 5 The number of ATP molecules formed indirectly via oxidative phosphorylation in glycolysis is: a) 1 B) 2 c) 3 d) 5
- The oxygen (O2) consumed during aerobic cellular respiration is involved directly in which process or event? A) the phosphorylation of ADP to form ATP B)accepting electrons at the end of the electron transport chain C)glycolysis D)the oxidation of pyruvate to acetyl-CoA E)the citric acid cycle 12.Glycolysis consists of three irreversible steps. Which of the following enzyme- catalyzed reaction are not irreversible steps in glycolysis? a) Hexokinase Ob) Phosphofructokinase Oc) Glyceraldehyde-3-phosphate kinase Od) Pyruvate kinaseWhat Is The Main Purpose Of Oxygen In Cellular Respiration? A)Allowing For The Break Down Of Glucose In Pyruvate B)Suppling Electrons To The Electron Transport Chain C)Allowig For A Flow Of Electrons In The Electron Transport Chain D)Oxidation Of Pyruvate To Acetyl COA