Midterm 1 Exam Review-1

Midterm 1 Exam Review-1 - Midterm 1 Exam Review 1. Draw a...

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Midterm 1 Exam Review 1. Draw a peptide bond between any two amino acids at the pH of 6 and circle the peptide bond? Also, indicate all alpha carbons? 2. Consider the follow reaction. X Y + D ; Keq = 10 ^-8 . Calculate the standard free-energy change? 3. Consider a reaction similar as in question 3, who’s ∆G 0’ is determined to be +2.9kcal/mol. a. Calculate the equilibrium constant of the reaction? b. In spite of the positive ∆G 0’ , how can this reaction go on inside a cell? 4. Consider the follow reaction GTP GDP + Pi. For this reaction the ∆G 0’ is - 4.9kcal/mol. [GTP]= 10 -1 mM, [GDP]= 10 -3 mM, [Pi]=10 -5 . Calculate ∆G for this reaction?
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5. Consider the same reaction as in question 4. If Keq for this reaction was found to be 10 -2 . Calculate ∆G, using the same concentration as in question 4. 6. Define endergonic and exergonic in terms of Reactions? 7. List the 3 mechanisms by which enzymes accelerate reactions. Lowering activation energy does not count as one. 8.
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Midterm 1 Exam Review-1 - Midterm 1 Exam Review 1. Draw a...

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