BI/CH421 Biochemistry Exam 1 10/02/2017 | SOLVED EXAM, DOWNLOAD FOR QUALITY GRADES

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1. The equilibrium constant, Keq, for the hydrolysis of ATP (ATP à ADP + Pi) is 2 x 105 M. If the measured concentration of the cellular concentrations of ATP, ADP, and Pi are 5 mM, 0.5 mM and 5 ... mM respectively. From this information, you can say (worked example 1.1in your text) a. The reaction is at equilibrium inside cells b. The hydrolysis reaction will proceed spontaneously inside cells c. The hydrolysis of ATP will require an input of energy to occur within cells d. The hydrolysis of ATP could only occur spontaneously if it is coupled to an energetically favorable reaction e. Both C and D are true 2. Rank the following bonds in terms of their relative typical strengths 1: Dipole-dipole interaction 2: Ionic interaction 3: London dispersion forces 4: Hydrogen bond a. 4 > 1 > 2 > 3 b. 3 > 2 > 1 >4 c. 2 > 4 > 3 > 1 d. 2> 4 > 1 > 3 3. Which amino acid pairs listed below are some of the major contributors to protein absorbance at 280 nm? a. Tyrosine and proline b. Tryptophan and histidine c. Histidine and proline d. Tyrosine and tryptophan e. All amino acids absorb at 280 nm 4. How many hydrogen bonds can pyridoxal phosphate (shown below) donate to the surrounding water? a. 0 b. 1 c. 2 d. 3 e. >3 5. The pH of a solution containing 1x10-4 M of HCl will b [Show More]

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