exam1_prac_prob

# exam1_prac_prob - 20.320 Spring 2006 Exam 1 Review Practice...

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20 .320 Spring 2006 Exam 1 Review Practice Problems 1. A system (P + L Æ C) undergoes complex formation and comes to equilibrium at the following species concentrations: [P] = 10 µM, [L] = 10 µM, [C] = 10 µM. a) What is K d for this reaction? b) At equilibrium, what is the fractional saturation y? -6 2. Given the following conditions: [P] 0 = 100 µM, K d = 10 M. What concentration of ligand would you need to start with inorder to be able to assume the pseudo first order approximation (% error < 1%)? 3. Take the equation: Under what conditions will [C] L,I = [C] L ? 4. Write the system of equations governing the following reaction scheme: a) What are the units on k2? b) Does the system have an equilibrium state? If so, what is it? If not, why not? 5. Given the reaction: a) What is the time constant for the reaction? b) How many time constants must pass before the reaction is within 90% of equilibrium? c) What would increase the time to equilibrium?

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exam1_prac_prob - 20.320 Spring 2006 Exam 1 Review Practice...

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