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1. Which is FALSE about enzyme catalysis?A. Enzymes are highly specific for their substratesB. Enzyme-catalyzed reactions are 10^3 to 10^20 times faster than the coreesponding un-catalyzed reactionsC. Most enzymes are proteins or proteins with cofactorsD. Enzymes can lower activation energyE. Enzymes raise the equilibrium constant of a reaction
2. Specifically, what is meant by the steady-state assumption in the derivation of the Michaelis-Menton equation?A. The concentration of ES is constant.B. The formation of the product is the rate limiting step.C. The reaction has achieved maximum velocity.D. The rate of the P + E => ES is negligible.E. The temperature is constant.
3. If two enzymes catalyze the same reaction, what does a comparison of Km values tell you?A. The enzyme with a lower Km has a lower VmaxB. The enzyme with a higher Km has a lower VmaxC. The enzyme with a lower Km has a greater affinity for the substrate.D. The enzyme with a higher Km has a greater affinity for the substrate
4. Which statement is true about catalysts?A. They are generally complementary to the substrate.B. They lower the free energy of the intermediates.C. They stabilize transition states.D. They reduce ?G^o'E. All of the above
5. Which is classified as a chemical mode of catalysis?A. Induced fitB. Proximity effectC. Acid-base catalysisD. Transition state stabilizationE. Catalytic antibodies
Chromatographic assay reveals the total amount of T3 in the blood is 10 micrograms.
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Enzymes are typically required to catalyze reactions that would be very unlikely to occur on their own. Suppose that the activation energy, Ea, for the uncatalyzed cheese reaction at 20C is 18kcal/mol.
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how efficient is fermentaion? how efficient is cellular respiration ? Eggiciency is calculated as the amount of useful energy (as ATP) gained during the process divided by the total amount of energy available in glucose. Use 686 kcal as the total ..
Which magnification was most helpful in making this determination? What optical principles are involved here and describe the role of each.
2-experimental varieties of strawberry are produced by crossing a hexaploid line that contains 48 chromosomes and a tetraploid line that contains thirty-two chromosomes.
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