Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 18.13, Problem 28P
Why is the coenzyme called tetrahydrofolate?
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10. Enzymes that have binding sites for modulators are specifically called
a. zymogens
Ob. quaternary proteins
c. induced enzymes
d. allosteric enzymes
Chapter 18 Solutions
Essential Organic Chemistry (3rd 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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- Why are so many different enzymes needed?arrow_forwardThe first step of the metabolic process known as glycolysis is the conversion of glucose to glucose- 6-phosphate. This process has a positive value for rG' Glucose + Pi Glucose-6-phosphate + H2O rG' = +13.8 kJ/mol-rxn This reaction is coupled to the hydrolysis of ATP ATP + H2O ADP + Pi rG' = -30.5 kJ/mol-rxn What is the sum of these two equations and the value of rG' for the coupled reaction? Is the coupled reaction product-favored at equilibrium?arrow_forwardDescribe the importance of zymogens in the body. Give an example of an enzyme that has a zymogen.arrow_forward
- What is the Term for elemental cations that actas enzymatic cofactors?arrow_forwardWhich best describes the role of enzymes in a chemical reaction? A. They lower the activation energy in the reaction. B. They prevent the reaction from occurring. C. They are produced by the reaction. D. They are consumed by the reaction.arrow_forwardThe substance where the enzyme reacts with? A. Substrate B. Inhibitor C. A & B D. Activator E. Productarrow_forward
- What is an allosteric inhibitoarrow_forwardWhich of the following enzymes is found in blood serum and is diagnostic of prostate cancer if enzyme levels are elevated? A.alanine aminotransferase B.phosphohexose isomerase C.lactate dehydrogenase D.acid phosphatase E.alkaline phosphatasearrow_forwardwhat part of the name catalase indicates that it is an enzymearrow_forward
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