What kind of kinetics is observed in an enzymatic reaction, under conditions where the substrate concentration is much higher with respect to KM ([S] >> KM)? Assume that a monomeric and non-allosteric enzyme is considered.
A. Cooperative
B. First Order
C. Zero Order
D. The systerm is at equilibrium and no reaction occures
E. Second Order
What kind of kinetics is observed in an enzymatic reaction, under conditions where the substrate concentration...
If the concentration of substrate in an enzymatic reaction is set to the Km of the enzyme substrate system then the velocity is equal to: 0 units / second Vmax units/second Vmax/2 units/second 1/3 Vmax units/second 2/3 Vmax units/second 100 units / second
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
The Km of an enzymatic reaction is 10^-4 M. What substrate concentration is needed in order to attain 60% if the maximum velocity of the reaction?
(10 points) Michaelis-Menten kinetics. Consider ving enzymatic reaction, E + A H EA → E+ P where E, A, and P are the concentrations of enzyme, substrate and product reen Show that rate and product respectively. V = "max [A] Km + [A]
3) Enzyme kinetics are determined under initial rate conditions, wherein the initial substrate concentrations changes very little, because: (A) Products do not accumulate and inhibit the forward reaction (B) Enzymes are unstable under most assay conditions, and rapidly lose activity (C) The substrate concentration does not change appreciably and so does not create an additional variable (D) All of the above (E) Some of the above
Consider a description of an enzymatic reaction pathway that begins with the binding of substrate S to enzyme E and ends with the release of product P from the enzyme. E+S →ES → EP E+P Under many circumstances, KM = [E] [S] / [ES] What proportion of enzyme molecules are bound to substrate when [S] = KM? Why? Recall that when [S] = KM, the reaction rate is Vmax/2. Does your answer to Part A make sense in light of...
The rate law for a certain enzymatic reaction is zero order with respect to the substrate. The rate constant for this reaction is 4.6 times 10^2 M middot s^-1. If the initial concentration of the substrate is 0.338 mol L^-1, what is the initial rate of the reaction? rate = _______ times 10 _______ M middot s^-1
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...
Vmax II. Enzyme Kinetics 1. Vocabulary - match the term on the left with the definition on the right (each used only once) keat a. Concentration of inhibitor where the velocity is the maximum under a given set of conditions. Allostery b. Changes in active site properties through ligand binding to another site. K c. Rate of an enzyme reaction under a given set of conditions. Hill coefficent d. Maximum rate for an enzyme under a given set of conditions....
7. a) In an enzyme catalyzed reaction which follows the Michaelis-Menten kinetics. The substrate concentration (Km, Michaelis constant) needed to reach 50% of the maximum reaction velocity (Vmax) is 20 μΜ. What substrate concentration is required to obtain at least 75% of the maximum reaction velocity? Show the work to get full points. (5 points) b) You want to load 10 μg of protein in 15 μL into one of the 10% polyacrylamide gel well. The protein needs to be...