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biochem test3 08 - University of Houston BCHS 3304 Exam III...

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Unformatted text preview: University of Houston BCHS 3304 Exam III Instructor Dr. Briggs Apr. 03, 2008 Printed Name 6TH. a mat. , GT“ 5 "‘35 E g . _ _____ , 7 _ LAST, FIRST ' Multiple choice, 2 pts each (100 pts) — Circle letter (i.e. a., b., 0., d., or e.) of the Lugs; correct answer, then mark it on the Scantron sheet with a #2 pencil. Mark BOTH the exam AND the Scantron sheet. A table of half reactions and graph paper are at the end of this exam. 1). Catabolism is: a. The synthesis of complex molecules from simple ones b. The eating of human flesh c. The acquisition of free energy fr > W W" , e. Self—feeding oréanisrns 2). The KM can be considered to be the same as the dissociation constant K5 for E + S binding if: a. this statement cannot be completed because KM can never approximate Kg b. ES —> E + P is fast compared to ES —> E + 5;th c. the tumofiver number is very large l; M : k0 e. Item/KM is near the diffusion-controlled limit fix 3). How many carbon atoms does a keto'lse contain? a. One b. Two c. Three 4). What kind of functional group does an aldose contain? a. Ketone ‘3 b. Ketene c Aldane a tier”? —~ . Qumran? e. Hexane 5). Find the initial velocity for an enzymatic reaction when VmEm = 6.5 X 10‘5 mol/sec, [S] =3.0 X 10'3 - L__——’———‘—J Lf——J M, and KM= 4.5 x 10 3 M. information is given to make this calculation @ 1.4 x 10'2 mol/sec d. 8.7 x 10—3 Incl/sec e. 3.9 x 10‘5 mol/sec ...
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