22 Questions
What is the effect of increasing substrate concentration on the rate of an enzyme-catalyzed reaction at low substrate concentrations?
The rate of reaction increases linearly
What is the Michaelis-Menten equation for the rate of an enzyme-catalyzed reaction?
v = vmax [S]/(km + [S])
What is the effect of increasing substrate concentration on the rate of an enzyme-catalyzed reaction at high substrate concentrations?
The rate of reaction reaches a maximum value
What is the term for the maximum rate of an enzyme-catalyzed reaction at high substrate concentrations?
Vmax
What is the term for the substrate concentration at which the rate of an enzyme-catalyzed reaction is half of the maximum rate?
Km
What is the effect of increasing enzyme concentration on the rate of an enzyme-catalyzed reaction?
The rate of reaction increases linearly
What is the purpose of the Lineweaver-Burk plot?
To determine the Km value
What is the catalytic efficiency of an enzyme?
Kcat / Km
What is the term for the number of times a catalyst enters a reaction to form products per unit time?
Turnover frequency
What is the effect of increasing substrate concentration on the Km value?
Km remains unchanged
What is the rate of adsorption proportional to?
Partial pressure of A and the number of vacant sites
What is the effect of high pressure on the decomposition of PH3?
The reaction becomes zeroth order
In the Langmuir-Hinshelwood mechanism, what is the rate of reaction v proportional to?
The surface coverage of A and B
What is the relationship between the rate of adsorption and the rate of desorption in the Langmuir isotherm?
The rate of adsorption is equal to the rate of desorption at equilibrium
What is the effect of substrate concentration on the reaction rate in the Langmuir-Hinshelwood mechanism?
The reaction rate is proportional to the substrate concentration
What is the role of the surface in heterogeneous catalysis?
The surface acts as a catalyst
What is the approximate rate of change of intermediate species concentration during the steady-state approximation?
d[I]/dt ≈ 0
What is the relationship between the concentration of A and the concentration of intermediate species I under the steady-state approximation?
[I] ≈ ka [A]/kb
What is the rate of formation of product P in terms of the concentration of A under the steady-state approximation?
d[P]/dt = ka [A]
What is the condition for the steady-state approximation to be a good approximation?
ka > kb
What is the relationship between the rate constant k and the temperature T according to the Arrhenius equation?
k = A exp(-Ea/(RT))
What is the effect of increasing the temperature by 10 K on the rate constant k?
k increases by 2-3 times
Learn about temperature adaptation in biological systems, including the concept of activation energy, temperature dependence, and catalysis. Understand how biological organisms adapt to temperature changes and the role of catalysts in chemical reactions.
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