Urease Is an Enzyme That Catalyzes the Decomposition of Urea

question 74

Multiple Choice

Urease is an enzyme that catalyzes the decomposition of urea to ammonia and carbon dioxide. The rate constant for the uncatalyzed reaction is 4.0  10^-11/s at 22°C. Urease increases the rate constant to a value of 8.0  10^-5/s. Use the Arrhenius equation, which is given below, to determine the difference in the activation energies E_uncatalyzed - E_catalyzed. (R = 8.315 J/mol K)

• A) 23 kJ/mol
• B) 2.3 kJ/mol
• C) 15 kJ/mol
• D) 36 kJ/mol
• E) 51 kJ/mol

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Definitions:

Disenchantment

A feeling of disillusionment or dissatisfaction, often resulting from unmet expectations or the realization that reality does not match ideals.

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Temperature

A physical quantity expressing how hot or cold an environment is, typically measured in degrees Celsius (°C), Fahrenheit (°F), or Kelvin (K).