a. What kind of reaction is being performed here? b. What enzyme performs this reaction? c. What cofactors, if any, are required for this reaction?
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- 3. Consider the reaction: H3C-(CH₂) H H C—C—C—SCOA HH H₂C-(CH₂) a. What kind of reaction is being performed here? b. What enzyme performs this reaction? -C—C—C—SCOA H H c. What cofactors, if any, are required for this reaction?Consider the reaction: H O C—C—C—SCOA H₂C(CH₂)C= CO H H₂C-(CH₂) What kind of reaction is being performed here? b. What enzyme performs this reaction? OH H O O=C -C—C—C—SCOA H H c. What cofactors, if any, are required for this reaction?7. Consider the reaction: H3CC-CH₂-C—S-ACP H3C OH b. What enzyme performs this reaction? C-CH₂-C—S-ACP a. What kind of reaction is being performed here? c. What cofactors, if any, are required for this reaction?
- 5. Consider the reaction: | OH H H₂C-(CH₂) C C—C—SCOA HH H₂C-(CH₂) a. What kind of reaction is being performed here? b. What enzyme performs this reaction? OHO C—C—C—SCOA c. What cofactors, if any, are required for this reaction? HSucrase has an optimum temperature of 37°C and an optimum pH of 6.2. Determine the effect of the following on its rate of reaction: 1) no change 2) increase decrease 3) A. increasing the concentration of sucrase B. changing the pH to 4.0 C. running the reaction at 70°C What are the functions of Allosteric enzymes What are some factors that affects enzyme activity? I. II. III. IV. V. VI. Enzyme activity can be regulated by allosteric enzymes, feedback control, and covalent modifications. T/F Examples of Zymogens are the proteases trypsinogen and chymotrypsinogen. T/F? Trypsin catalyzes the removal of dipeptides from inactive chymotrypsinogen and trypsinogen to give the active proteases chymotrypsin and trypsin. T/F The removal of a polypeptide chain from proinsulin produces the active form of insulin. T/F? A kinase can activate an inactive enzyme by phosphorylation, ie adding a phosphate group. T/F? A phosphatase can activate an inactive enzyme by removal of phosphate. T/F? Identify…1. Consider the following parameters related to an enzyme that follows Michaelis-Menten kinetics for the reaction: k(1) k(2) S ----> ES ----> P k(-1)
- 3. Draw a properly-labeled reaction progress diagram with two lines: one line for the enzyme-catalyzed reaction, and one line for the enzyme-uncatalyzed reaction. The simplified expression for the reaction is S→ P. Assume this reaction is thermodynamically favorable. Show all appropriate species for the enzymatic reaction. Then, answer these questions: A) Are AG and AG# the same thing? B) Which of these properties is related to reaction velocity (k), and what equation describes that relationship? C) Finally, exactly how do enzymes speed up reaction rates? In your answer, please provide both a thermodynamic argument AND a structural argument.a. What is the name of metabolite 1? b. What is the name of metabolite 2? c. What kind of reaction occurred when 1 was converted to 2? d. What general kind of enzyme might you expect to perform this reaction? e. What cofactor, if any, would be required for this reaction?The decomposition reaction of hydrogen peroxide (H₂O₂) proceeds as follows: 2 H₂0₂ → 2 H₂O + 0₂ 2 This reaction can occur without a catalyst, in the presence of a chemical catalyst (platinum) or of a biological catalyst (catalase). 1- From the values given in the table below, determine the catalytic power of each catalyst (ratio of the catalyzed rate of reaction to the uncatalyzed rate). 2- Which catalyst is the most efficient? Reaction conditions No catalyst Platinum Catalase Ea (kJ.mol¹) at 20 °C 75 49 8
- 4.Pepsin is the proteolytic enzyme of gastric juice. The active form of this enzyme is formed from pepsinogen under HCL action.Optimum of enzyme action: pH = 1.5, t = 37°. Describe the properties of this enzyme. For this:1)Name and explain the mechanism of this enzyme activation.2)Draw the plot and explain the effects of pH and t on the reaction velocity.3) Explain how changes the velocity of this reaction in patients suffering from hypoacidie gastritis.1. Answer the following questions, based on this reaction: S +E ES EP E +P A)What is the slow step of this reaction, and why is that step slow?Match the following catalytic strategies with their example. Place a Letter on the picture. There are only two examples given. CH2OH CH2OH CH2OH CH2OH он он OH OH + H20 OH OH OH но H. но но OH OH OH OH OH OH A. Oxidoreducatase B. Transferase C. Hydrolase D. Lyase NH3 E. Isomerase F. Ligase R-CH-COO "ooc-CH2-CH2-C-COO Amino acid a-Ketoglutarate