3. Consider the reaction: H3C-(CH₂) H H C—C—C—SCOA HH H3C-(CH₂) a. What kind of reaction is being performed here? b. What enzyme performs this reaction? H c. What cofactors, if any, are required for this reaction? H C—C—C—SCOA
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- 6. Consider the reaction: H H SCOA 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? H H SCOA4. Consider the reaction: OH CH H3C O C H₂ a. What kind of reaction is being performed here? H3C C H₂ b. What enzyme performs this reaction? 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? H
- Sucrase 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…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?You are working on an enzyme that obeys standard Michaelis-Menten kinetics. What variable is the V, dependant on if the concentration of the substrate is substantially higher than the concentration of the enzyme? [S] [E] [ES] O [P] O not enough information provided
- 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?(i) During the Pyruvate Decarboxylase (PDC) catalysed reaction, a covalent coenzyme intermediate is formed. On the skeleton of the covalent coenzyme intermediate below draw the appropriate double bonds, charges, and electron pairs to illustrate the two resonance forms of this intermediate. Name each form in the boxes provided. HO S R' N -R HO S R' N -RThe 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
- 1) what is the equilibrium constant for the reaction A + CT AT+ C? Show calculations. 2) the image1.) Evaluate the general reaction pictured and select the statement that best explains the process taking place. A+ enzyme + ATP → [A^enzyme¨P] → B + enzyme + ADP + phosphate ion 2.) The combustion of glucose occurs as an oxidation-reduction reaction according to the chemical equation: C, H12O6 (s) + 6O2 (g) → 6CO2 (g)+ 6H2O(g) Which component of the equation is reduced during the reaction?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.