41 The following data describe an enzyme-catalyzed reaction (hydrolysis ofcarbobenzoxyglycyl-L-tryptophan) Plot these results using the Lineweaver-Burkmethod, and determine values for KM and VmaxVelocity (mM.sec-)0 0240 0360 0530 0600 0610 062Substrate Concentration (mM)255010 015 020025 042 If the KM of an enzyme for its substrate remains constant as the concentration of theinhibitor increases, what can be said about the mode of inhibition and why?43 Calculate the turnover number for an enzyme, assumıng Vmax IS 05 M sec1 and theconcentration of the enzyme used is 0 002 M Why is it useful to know this?44 Dıscuss the mechanism of the Bohr effect that occurs during the interactions of Hbwith oxygen under physiological conditions in the lungs and tissues Make use ofrelevant graphs and diagrams to explain your answer

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Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Utilising the provided class data generate the following graphs: I) Michaelis Menten; II) Lineweaver-Burk; and III) Hanes-Woolf. Ensure that you clearly label each graph,and add the relevant trendlines with equations. Table 1: Class data demonstrating the Absorbance at 700nm obtained for the alkaline phosphatase enzyme reaction Table 1 tube Abs700mm 1 0.000 2 0.060 2 0.090 4 0.140 5 0.190 6 0.250 7 0.290 The equipment we used are • 20mM Tris Buffer pH 8.5 • 33mM MgCl2 • Alkaline Phosphatase (2mg/ml) in 20mM Tris Buffer pH 8.5 • 4mM Glucose-1-phosphate • Acid Molybdate pH 5.0 • Reducing Agent • Distilled Water • Glass Test tubes • Tube Rack • Cuvette • Pipettes and Tips • Water bath set to 37oC The method we used is Method/Protocol: 1. Read the protocol in its entirety before starting. Take note of any additional information that appears in subsequent steps that may influence how previous steps are performed. 2. Using glass tubes, generate the reactions mixtures…
The equation of the double reciprocal plot is y = 0.5294 x + 1.4960. What is the value of vmax (in M/s)? The substrate concentration is given in units of molarity (M) and reaction velocity has units of molarity per second (M/s). (Report to three significant figures)
can you explain what is happening in the attached graph? Figure 3: Lineweaver-Burke plot of alkaline phosphatase activity without inhibitor
If the enzyme lactase has a Vo of 0.111111111111 mM per minute when [S] = 1.0 mM, and a Vo of 0.20 mM per minute when [S] = 5.0 mM, what is its Km? 0.125 mM 0.25 mM 0.50 mM 1.25 mM 5.0 mM
Write the balanced reaction catalyzed by phophoenolpyruvate carboxylase (P PC). Remember to add any cofactors, and to draw the structure formulas (a line-bond representation is fine) for the main substrate and product of the reaction.
Chymotrypsin has the highest affinity for which of the following substrates: Table. The values of KM and kcat for some Enzymes and Substrates Enzyme Chymotrypsin Ки (М) 4.4 x 10-1 8.8 x 10-2 6.6 x 104 Kcat (S-1) 5.1 x 10-2 1.7 x 10-1 1.9 x 102 Substrate N-acetylglycine ethyl ester N-acetylvaline ethyl ester N-acetyltyrosine ethyl ester Catalase H2O2 2.5 x 10-2 1.0 x 107 Urease Urea 2.5 x 10-2 4.0 x 105 OA. N-acetylglycine ethyl ester OB. N-acetylvaline ethyl ester OC. N-acetyltyrosine ethyl ester D. Urea
Table 1 shows the kinetic data that have been obtained for glucoamylase from Aspergillus niger at different temperatures in the production of glucose from maltodextrin. The rates of reaction measured are using an enzymes concentration of 0.003 μmolml-¹. Table 1: Glucoamylase Activity at different temperatures Maltodextrin Concentration (μmol/L) 0.5 1 1.5 2.2 5.5 11 Initial Reaction Velocity (μmol/L.s) T = 40°C 2.1 3.5 4.9 5.6 589 8.3 9.3 T = 60°C 5.2 9.7 13 16 23 31
There are six classes of enzymes, namely oxidoreductases, transferases, hydrolases, lyases, isomerases and ligases. (i) (ii) Cell disruption is one of the steps performed during enzyme production. Explain the reason of performing cell disruption in enzyme production and provide THREE (3) enzyme extraction methods for this type of enzyme. Explain the principles of gel electrophoresis as one of the methods used for enzyme purification.
1) Is the ratio of the forward rate constant and reverse rate constant changed by the presence of an enzyme catalyst? 2) 4) What is the simplest mathematical relationship between substrate concentrations [S], initial velocity (Vo) of an enzyme catalyzed reaction, the maximal velocity of the reaction (Vmax), and the ½ maximal Vo (i.e. Km) ? (Hint: what is the Michaelis-Menten Equation? 3) Graphically illustrate the most useful derivation of the Michaelis-Menton equation (that darn linearized, double-reciprocal)
The enzyme serine hydroxymethy ltransferase (SHMT) catalyses the conversion of serine into glycine. The fo llowing table gives the initial rates, vo, for the SHMT-catalysed reaction of the substrate serine at var ious concentratio ns of serine, lSI.[S]/(mmol dm-3) 10 20 30 40vo(μmol dm-3 s-1) 1.63 2.94 4.10 4.95Use the data to determine the values of the MichaelisMenten constant, the maximum velocity of the reaction, and the maximum turnover number of the enzyme.

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