Quiz 21 / 1 ptsQuestion 1An enzyme’s effect on the forward and reverse reaction rates of a reactionit catalyzes is best described as follows it increases the reverse but not the forward reaction rate it changes the equilibrium constant of the reaction it increases both reaction rates to the same extent Correct!Correct! it increases the forward but not the reverse reaction rate 1 / 1 ptsQuestion 2Which part of chymotrypsin is most important in promoting specificity ofhydrolytic cleavage of only certain peptide bonds of a protein? aspartate of the catalytic triad erine of the catalytic triad hydrophobic pocket Correct!Correct! o yanion hole 1 / 1 ptsQuestion 3The term S/(S + Km) as discussed in class is the Vo at a given value of S describes the fraction of maximum enzyme rate as a function of substrateconcentrationCorrect! defines the Hill coefficient as Km describes the fraction of binding site occupancy as a function of ligandconcentration0 / 1 ptsQuestion 4During our discussion of chorismate mutase we learned: Tryptophan is an allosteric activator of the enzyme orrect Answer Tyrosine is an allosteric activator of the enzyme The enzyme has a four subunit quaternary structure Both W and Y are allosteric inhibitors of the enzyme 0 / 1 ptsQuestion 5In a Lineweaver-Burk plot The slope of the plot is Vmax The substrate increases to the right along the horizontal axis 1/S is plotted against 1/Vo orrect Answer The y-intercept is 1/Km Quiz Score: 3 out of
View Full Document