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Final exam - 42101Finalexam May8,2012 Name ,...

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42 101 Final exam Name________________________________________________ May 8, 2012 Unless otherwise stated, there is only one correct answer per question General solutions ) ( ) ( t kY dt t dY = kt e Y t Y 0 ) ( = k dt t dY = ) ( k 2 1 ln 2 1 = τ kt t Y = ) ( k D 2 ln = τ [ ][ ] [ ] RL L R K D = [ ] [ ] [ ] [ ] T D R RL L K L f = + = If ligand in excess η σ ε t - exp 1 = 0 E E t E η σ σ ε 0 0 + = Strain for a Kelvin Voigt solid Strain for a Maxwell fluid
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42 101 Final exam Name________________________________________________ May 8, 2012 Unless otherwise stated, there is only one correct answer per question 1. What type of chemical reaction progresses as S + E ֖ ES E + P? (2 points) A. Fast reaction B. Slow reaction C. Enzymatic reaction D. Michaelis Menten reaction 2. If K D << ligand concentration and ligand is in excess, what fraction of receptors are bound? (2 points) ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Gadolinium Gd 152 is used as a contrast agent for MRIs, and a radioactive isotope Gd 153 is used for PET. Gd 153 is produced in a nuclear reactor and has a half life of 250 days. 3. What is an application for which PET is better than MRI? (2 points) 4. How does gadolinium produce contrast in an MRI? (2 points) 5. If 1 gram of Gd 153 is injected into a patient for a PET scan. How much is left in the body after 1 year? (6 points) ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ 6. Draw and label the 3 component stresses in a blood vessel (3 points)
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