the enzyme catalase on hydrogen peroxide while subject to different concentrations of an inhibitor. The hypothesis was that hydrogen peroxide will be broken down by catalase into hydrogen and oxygen‚ where a higher concentration of inhibitor will yield less oxygen‚ resultant of a lower rate of reaction. Crushed potato samples of equal weight were placed in hydrogen peroxide solutions of various temperatures. The results showed that less gas was produced as the concentration of the inhibitor rose
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The effect of Lead ions on amylase activity Aim What is the effect of Lead ions on the enzyme Amylase. And does it have an inhibitory effect‚ which causes the substrate‚ in this case starch to be blocked from the reaction process in the enzyme catalyst. Also is the effect reversible or irreversible‚ which is put on the amylase. Method Apparatus and substances required Test tube holder 2% starch solution 6 boiling tubes labelled 1 to 6 1% lead nitrate solution 6 test tubes labelled A to E‚
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Topic 2- Pages 38-39 1a. A is a substrate for the enzyme as it has the complementary shape to fit into it. 1b. The non-competitive inhibitor decreases the RoR as it binds to somewhere else than the active site and then causes the active site to change shape meaning the substrate is no longer complementary so it wouldn’t bind together. 1ci. Peptide 1cii. The 35 and 52 amino acids are held close to form the active site due to the tight folding of the polypeptide chains 2ai. There will be
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the same functional group 3. In living organisms‚ buffers do which of the following? a) prevent charged particles from entering cells b) neutralize the effect of enzymes c) maintain pH in the cells within a narrow range‚ allowing enzymes to function d) allow the pH of cells to change without affecting the action of the enzymes e) maintain cytoplasm in a fluid condition 4. When atoms from two different elements are brought together under conditions that will favour a reaction and they
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Starch can be hydrolyzed into simpler carbohydrates by acids‚ various enzymes‚ or a combination of the two. The resulting fragments are known as dextrins. The extent of conversion is typically quantified by dextrose equivalent (DE)‚ which is roughly the fraction of the glycosidic bonds in starch that have been broken. These starch sugars are by far the most common starch based food ingredient and are used as sweetener in many drinks and foods. They include: Maltodextrin‚ a lightly hydrolyzed (DE
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1. What is a COX-2 inhibitor? Why is it named so? How does it differ from COX-1 inhibitors? (3) COX-2 inhibitors are drugs used to treat inflammation. An example of a COX-2 inhibitor would be Celebrex. They are named COX-2 inhibitors because they inhibit cyclooxygenase-2 (COX-2) which is the enzyme responsible for inflammation. COX-2 inhibitors only affect inflammation while COX-1 would affect both inflammation and gastric acids in the stomach. COX-1 could lead to stomach issues with prolonged use
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diabetes: a consensus approach. Ball S.G.‚ Hass A.S.‚ (1994): what to expect from ACE inhibitors after myocardial infarction. Br Heart J. Biovail Pharmaceuticals‚ Inc Merck Sharp & Dohme. Vasotec® (1986): formulary information monograph. West Point‚ P.A. Merck. Prinivil® (lisinopril) (2006): tablets prescribing information. Whitehouse Station‚ N.J. D‚ Robertson J.I.‚ (1990): Angiotensin converting enzyme inhibitors and moderate hypertension Neaton J.D.‚ Kuller L.H.‚ (2005): Diuretics are color blind
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different. Therefore‚ both cinnamic acid and benzoic acid exhibit non-competitive inhibition for tyrosinase. Thiourea showed different results for Vmax and Km‚ still indicating that thiourea is a non-competitive inhibitor of tyrosinase. It was found that cinnamic acid is the strongest inhibitor of the three. Introduction Tyrosinase‚ also commonly called polyphenol oxidase‚ catalyses two reactions: ortho-hydroxylation of monophenols and aerobic oxidation of ortho-diphenols. Equations 1 and 2: Monohydroxyphenol
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How PPI (Proton Pump Inhibitors) Cause Anxiety? You might be feeling stressed and anxious at times and wondering why does it happening. I recommend you to check if you are taking proton pump inhibitors. Your doctor might have prescribed you proton pump inhibitors for your stomach related disease and you might be taking it for a long time. Yes‚ chronic use of proton pump inhibitors can show anxiety symptoms! When Do PPIs Prescribe? In digestive diseases like gastritis‚ there is increased secretion
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__________________________________ AP Biology LAB 2. ENZYME CATALYSIS ESSAY 2000 The effects of pH and temperature were studied for an enzyme-catalyzed reaction. The following results were obtained. a. How do (1) temperature and (2) pH affect the activity of this enzyme? In your answer‚ include a discussion of the relationship between the structure and the function of this enzyme‚ as well as a discussion of how structure and function of enzymes are affected by temperature and pH. b. Describe
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