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How would a 50% increase in enzyme concentration affect the observed KM? A. KM unchanged B....
OM HO OH For this figure, use the letter next to the carbon to answer the question. Which letter is closest to the carbon that is C4 of glucose? e b с How would a 50% increase in enzyme concentration affect the observed KM? KM will be unchanged KM will increase by 1/2 Cannot be determined. KM will decrease by 1/2
1. a) If one were to decrease the enzyme concentration by half, how would this affect the Vmaxvalue? Explain why this is so. What assumption are we making in regards to the relative amounts of substrate to enzyme? b) Is the turnover rate (kcat value) of an enzyme expected to change if the enzyme concentration was decreased by half? Briefly explain. c) Is the turnover rate (kcat value) of an enzyme expected to change in the presence of a competitive...
At what substrate concentration would an enzyme with a kcat of 30.0 sec-1 and a Km of 0.0030 M have an initial velocity that is 25% of the maximum velocity? a. 0.0010M b 0.0090 M c. 0.0015 M d. 0.0060 M e.Cannot be determined
What is substrate concentration, expressed as a multiple of Km, when an enzyme reaction is observed to have an initial rate Vo = 0.75 Vmax. Select one: O a. [S] = 0.33 x km O b. [S] = 0.25 km O c. [S] = 0.75 x Km O d. [S] = 0.3 x km O e. [S] = 0.5 x km Check Next page ime Jump to...
Enzyme activity will be high when substrate concentration is equal to KM b. below KM c. above KM d. none of the above Metalloproteases mostly use the element Cu b. Fe c. Zn d. Mn
3. Why is an allosteric enzyme more sensitive to substrate concentration around Km values than a Michaelis-Menten enzyme with the same Vmax? 4. Explain how pH and temperature influence enzyme activity. ( A Lineweaver-Burk (double reciprocal) plot was used to compare the effects of three different reversible inhibitors (A, B and C) on an enzyme. The plot of 1/V vs 1/[S] for the enzyme with no inhibitor is shown in a solid black line. The plot of 1/V vs 1/[S]...
If the substrate concentration is varied with a fixed concentration of enzyme, it is observed that at low substrate concentrations that overall order while at high substrate concentrations, the reaction will be overall order. Select one: a. first; second b. first; third order c. first; zero d. second; second e. second; pseudo first order
List and describe the factors that can affect enzymatic reactions. a. Substrate Concentration b. Enzyme Concentration c. pH d. Temperature e. Cofactors f. Inhibitors (I have them listed but do not understand their affects)
13 14 Search 13 How will a mutation in the active site df an enzyme that reducing substrate binding affect enzyme parameters? OS (2 points) Reduce Vm Reduce Km Increase km Reduce Vm and km 14 Which amino acid residue sequence would mostly likely compose a transmembrane segment of a protein? (2 Points) VLVAVLESFLLLSL GRRHLGFEATFFQ GRKKRRORRRPQ NVFKGNTISOKIS 15 What would be observed if purified IgG was boiled and not reduced and then applied to SDS- PAGE (2 points)
inhibitor? 9 How are the kinetics of an enzyme-catalyzed reaction affected by a competitive A) Veax decreased, Ke increased B) Veax decreased, A decreased C) Vax decreased K unchanged D) V unchanged, Kw increased E V unchanged, Ki decreased 20. The ability for an enzyme to pick out one particular substrate from the myriad of molecules floating around its environment is an example of A) natural selection B) specificity C) high affinity D) processivity E) none of the above The...