IV. A. How does each of the following irreversible inhibitors interact with the Enzymes? 1. Cyanide 2. Heavy-metal ions B. List an antidote for each of these two poisons and describe how each functions.
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- 5.Aspirin isthedrug,used for the decreasing ofinflammatory reaction and temperature. 1)Describe the mechanism of aspirin action. 2) What types of reversible inhibition do you know.3)Give the examples of drugs acting as such inhibitors.8. In patients after prolonged hepatitis, the ALT and AST activities were measured in the blood serum. What transaminase activity is inereased to a greater extent, and why? For the answer: a) explain the meaning of the enzyme diagnostics; b) draw the scheme of reactions catalyzed by ALT and AST; c) point out coenzyme of these reactions; describe vitamin from which this cocnzyme is derived; d) describe the biological importance of this type of reactions in amino acid metabolism; e) specify the demands which are claimed to enzymes been used in enzyme diagnostics.Alpha-glucosidase inhibitors are contraindicated in all of the following cases, except:A. Diabetic ketoacidosisA. Liver cirrhosisB. HypertensionC. Large abdominal herniasD. Ulcerative colitis
- (c) Discuss the mechanism of action of the enzyme chymotrypsin.Drugs that inhibit eicosanoids formation may be... * agents reducing substrate arachidonic acid availability agents inhibiting the cyclooxygenase or lipoxygenase enzymes or both agents blocking eicosanoid receptors. O all of thema. What is the name of metabolite 1? b. What enzyme converts metabolite 1 to metabolite 2 (E1)? c. What is the name of metabolite 2? d. What enzyme converts metabolite 4 to metabolite 5 (E4)? e. What cofactor, if any, would E4 require?
- 8. In patients with diabetes mellitus type I, the biochemical disorders result from changes in fuel metabolism. One of these signs is acidosis. Explain why such patients have a deviation of blood pH from the norm? For this: b) write the reactions of synthesis and oxidation of these molecules, name the enzymes, coenzymes, reaction localization;B) Read the situations below and indicate which of the four methods of enzyme regulation is occurring for each. a) The energy-carrying molecule ATP is made by the enzyme ATP synthase. Muscle cells use a lot of energy and also have higher amounts of the ATP synthase enzyme than many ouier cem types. General mechanism of enzyme regulation: /1 b) Prostaglandins are messenger molecules involved in the inflammatory response, as well as th perception of pain. They are synthesized from polyunsaturated fatty acid substrates by an enzyn called cyclo-oxygenase. "Ibuprofen" is the active ingredient in a variety of anti-inflammatory medications such as Motrin® and Advil®. It reduces pain and swelling by binding to a hydrophobic channel in the active site of cyclo-oxygenase, blocking the polyunsaturated fatty acids from binding to the enzyme, and therefore stopping production of prostaglandins. General mechanism of enzyme regulation: a) In point form, describe the steps by which ATP is produced…For each of the following examples, indicate whether the drug is acting on physical process, chemical process or enzymatic system (your answer should be only; Physical, Chemical or Enzymatic). A. A drug is used as an antidote in lead poisoning and acts by binding to lead particles in body (chelation therapy). B. A drug acts to reduce flatulence and acts by reducing the surface tension of intestinal gas bubbles in the GI tract (e.g. Simethicone). C. A drug competes with alpha-glucosidase in intestine to reduce glucose conversion from disaccharides (e.g. Acarbose).
- 1. Discuss why a saturated fatty acid like lauric acid has a good anti-oxidant property. 2. Why are the essential fatty acid associated with low incidence of heart disease? Cite some clinical signs of essential fatty acid deficiency. 3. Explain how aspirin can block the synthesis of prostaglandins?3. A patient has got excess carbohydrate meal for the years and gain the weight. To explain this: a) draw the schemes of TAG synthesis in the liver; b) describe the transport of TAG from the liver to adipose tissue; c) describe the functions of insulin in the conversion of glucose to TAG in the liver and adipose tissue. Glucose containing Catoms was added to isolated hepatocytes inanexperiment. Ifthe glucose was added in excess, the rate of triacylglyccrol synthesis increased.1. With the prevalence in food of peeled cereals or bread made from high-grade flour, hypovitaminosis B1 may occur. Explain the role that vitamin B, plays in the body. For this: a) name the coenzyme which contains vitamin B, and enzymes, which require this cocnzyme to function; b) write the process in which these enzymes are involved and explain how the process speed will change with a lack of B,; d) what discase develops in the absence of vitamin B,.