Essential Organic Chemistry, Global Edition
3rd Edition
ISBN: 9781292089034
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 18.5, Problem 9P
What advantage does the enzyme gain by forming an imine?
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Chapter 18 Solutions
Essential Organic Chemistry, Global Edition
Ch. 18.1 - Prob. 1PCh. 18.2 - If H218O were used to hydrolyze lysozyme, which...Ch. 18.3 - Which of the following amino acid side chains can...Ch. 18.3 - Arginine and lysine side chains fit into trypsins...Ch. 18.4 - Which of the following amino acid side chains can...Ch. 18.4 - Prob. 6PCh. 18.5 - Prob. 7PCh. 18.5 - Draw the mechanism for the hydroxide-ion-catalyzed...Ch. 18.5 - What advantage does the enzyme gain by forming an...Ch. 18.7 - Prob. 10P
Ch. 18.7 - Prob. 11PCh. 18.8 - How many conjugated double bonds are there in a....Ch. 18.8 - Instead of adding to the 4a-position and...Ch. 18.8 - In succinate dehydrogenase, FAD is covalently...Ch. 18.8 - Prob. 15PCh. 18.9 - Acetolactate synthase is another TPP-requiring...Ch. 18.9 - Acetolactate synthase can also transfer the acyl...Ch. 18.9 - Prob. 18PCh. 18.9 - Prob. 19PCh. 18.10 - Prob. 21PCh. 18.11 - Prob. 23PCh. 18.11 - Which compound is more easily decarboxylated?Ch. 18.11 - Explain why the ability of PLP to catalyze an...Ch. 18.11 - Explain why the ability of PLP to catalyze an...Ch. 18.12 - What groups are interchanged in the following...Ch. 18.13 - Why is the coenzyme called tetrahydrofolate?Ch. 18.13 - What amino acid is formed by the following...Ch. 18.13 - How do the structures of tetrahydrofolate and...Ch. 18.13 - What is the source of the methyl group in...Ch. 18 - Prob. 32PCh. 18 - Prob. 33PCh. 18 - From what vitamins are the following coenzymes...Ch. 18 - Prob. 35PCh. 18 - For each of the following reaction, name both the...Ch. 18 - Explain why serine proteases do not catalyze...Ch. 18 - Prob. 38PCh. 18 - For each of the following enzyme catalyzed...Ch. 18 - Trisephosphate isomerase (TIM) catalyzes the...Ch. 18 - Prob. 41PCh. 18 - What acyl groups have we seen transferred by...Ch. 18 - When UMP is dissolved in T2O, exchange of T for H...Ch. 18 - Prob. 44PCh. 18 - When transaminated, the three branched-chain amino...Ch. 18 - Aldolase shows no activity if it is incubated with...
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- Oxaloacetate is an inhibitor of succinate dehydrogenase because it is structurally very similar to succinate as shown below. Also, its binding to the enzyme does not involve any covalent bond formation. What type of inhibitor is oxaloacetate? COO | CH₂ 1 CH₂ 1 COO Succinate COO | CH₂ C=O COO Oxaloacetate O a noncompetitive inhibitor both a noncompetitive and an irreversible inhibitor O an irreversible inhibitor O a competitive inhibitorarrow_forwardThe substance where the enzyme reacts with? A. Substrate B. Inhibitor C. A & B D. Activator E. Productarrow_forwardWhat is an antioxidant enzyme? Why is catalase considered to be an antioxidant enzyme?arrow_forward
- The reactant in an enzyme-catalyzed reaction is called a cofactor. True or False True Falsearrow_forwardActivation of a zymogen is by covalent modification. How might phosphorylation or dephosphorylation (also covalent modification) modify an enzyme to make it more active (or more inactive)?arrow_forwardBased on data attached please help with the following: -How does temperature affect the rate of the reaction? -How does the inhibitor affect the rate of the reaction?arrow_forward
- 1. What reaction is catalyzed by the enzyme carbonic anhydrase? Which metal ion serves as a cofactor for carbonic anhydrase? Explain how this metal ion is able to assist in catalyzing the reaction. 2. In relation to enzymes, what is the difference between a cosubstrate and a prosthetic group? Give one example of each.arrow_forwardDraw the structures of the substrate (pNPP) and of the inhibitors (Pi and Phe). Consider them in the fully deprotonated states. What similarities can you detect between each inhibitor and the substrate?arrow_forwardIdentify the modes of catalysis and when / why they occur• Acid-base • Covalent• Transition state stabilization• Catalysis by proximity • Catalysis by strain• Lock & key is better seen as describing substrate binding to active sitearrow_forward
- Compared to an uncatalyzed reaction, an enzyme-catalyzed reaction O produces different products. O requires a higher temperature. occurs at a faster rate. O uses less substrate. requires more energy.arrow_forwardWhat is the mechanism of action of the antibiotic drug Sulfanilamide in terms of enzyme inhibition?arrow_forwardNeostigmine is an inhibitor of acetylcholinesterase. The enzyme attempts to catalyse the same reaction on neostigmine as it does with acetylcholine. However, a stable intermediate is formed which prevents completion of the process and which results in a molecule being covalently linked to the active site. Identify (draw) the stable intermediate and explain why it is stable.arrow_forward
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