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- When glucose reacts with ATP to form glucose-6-phosphate: a. the synthesis of glucose-6-phosphate is exergonic. b. ADP is at a higher energy level than ATP. c. glucose-6-phosphate is at a higher energy level than glucose. d. because ATP donates a phosphate to glucose, this is not a coupled reaction. e. the reaction is spontaneous.22. Which hormone is NOT derived from cholesterol? a. oxytocin b. testosterone c. both a and b d. neither a nor b 23. Which lipoprotein mostly contains triacyglycerol (TAGs)? a. HDL b. VLDL c. LDL d. chylomicrons 24. Which enzyme in cholesterol synthesis is inhibited by statins? a. HMG-CoA synthase b. HMG-CoA reductase c. both a and b d. neither a nor b 25. Which lipoprotein prevents the formation of plaque in the artery? a. HDL b. VLDL c. LDL d. chylomicrons 26. In which test/s will triacylglycerol yield a positive result? a. acrolein b. translucent spot c. both a and b d. neither a nor b 27. In which solvent will corn oil be soluble? a. hexane b. benzene c. both a and b d. neither a nor b 28. In which test/s will cholesterol yield a positive result? a. acrolein b. Huble's test c. both a and b d. neither a nor b 29. Which sample would test negative in saponification test? a. cholesterol b. 18:2 fatty acid c. both a and b d. neither a nor b 30. What test could distinguish…1. In studying the effects of meditation, Benson found significant physiological changes, including: a. One's opposite to the "fight or flight" syndrome. b. Increased heart rate. c. Sensory stimulation. d. Cardiopulmonary alertness. e. Decreased neurotelephonic response. 2. The average American consumes nearly 150 pounds of sugars, sucrose and high fructose corn syrup, significantly less than was consumed in Colonial America. True False
- 1. 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. Oxidoreductase5. Which of the following enzymes is NOT used when fructose is metabolized to pyruvate in the liver? a. triose phosphate isomerase b. glyceraldehyde-3-phospate dehydrogenase c. glucokinase d. phosphofructokinase-1 e. pyruvate kinaseA patient who has been drinking large amounts of alcohol for long periods of time shows thefollowing symptoms: apathy, loss of memory, and a rhythmical to-and-fro motion of the eyeballs.Which of the following reactions are most likely to be affected in the patient? A. Conversation of pyruvate to acetyl-CoA B. Conversation of a-ketoglutarate to succinyl-CoA C. Both A and B D. Neither A nor B
- When the activated form of alcohol is used to synthesize glycerophospholipids, CDP-alcohol reacts with diacylglycerol to form glycerophospholipids. In this metabolic pathway, diacylglycerol is most likely produced by: a) Triacylglycerol lipase b) Phosphatidate phosphorylase c) Diacylglycerol lipase d) All of the above e) None of the aboveStatins are competitive inhibitors that target HMG CoA reductase to decrease plasma cholesterol. a) What effect statin has on the enzyme's Km, b) How can we reverse a competitive inhibitor's effect? a) Increases Km, b) Increasing the [S] a) decreasing Km, b) Increasing the [S] a) Increases Km, b) decreasing the [S] a) No effect on Km, b) Inhibitor cannot be reversedWhich of the following stimulates the conversion of pyruvate to acetyl-CoA? a) Activation of pyruvate dehydrogenase kinase b) A decrease in the ratio of NAD+/NADH c) Bothaandb d) Neither a nor b
- 3 Some enzymes are used in the clinical lab to diagnose diseases. There are two specific markers for enzymes in heart: lactate dehydrogenase(LDH) and creatine kinase (CK). Both of these enzymes are oligomeric,form several isoenzymes. The enzymes eatalyze the following reactions: 1. Name the classes of these enzymes. 2.What coenzyme reguires LDH? Write the formula ofthe vitamine, coenzyme is synthetized from. 3.Give the definition of the term “isoenzyme” and name types of isoenzyme and proteins appcared in the blood in myocardial infarction.1. Select the INCORRECT statement about Glutamate dehydrogenase : a. Catalyzes the removal of NH4+ into glutamate b.Catalyzes the incorporation of NH*4 into a-ketoglutarate c. Catalyzes the removal of NH*4 from glutamate C d. Catalyzes the incorporation of NH'4 into a-keto acid2. Which of the following statements is TRUE about phosphofructokinase-1? Select one: a. It is stimulated by AMP and ADP. b. It is inhibited by AMP and ADP. c. It is stimulated by citrate and ADP. d. It is stimulated by citrate and ATP.