Organic Chemistry (8th Edition)
8th Edition
ISBN: 9780134042282
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 26P
For each of the following reactions, name both the enzymes that catalyzes the reactions and the required coenzyme:
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The enzyme that catalyzes reaction below can be classified as:
NAD*
NADH + H*
Но-
H-Ć-
Н—с—н
H-
malate
dehydrogenase
Oxaloacetate
Malate
Why do we say the two enzyme-catalyzed reactions taking place in your test tube are "coupled"?
O peroxidase and glucose oxidase utilize hydrogen peroxide as a substrate
O peroxidase utilizes the lactone produced by glucose oxidase as a substrate
O because there is a dye in solution
O peroxidase and glucose oxidase utilize glucose as a substrate
Operoxidase utilizes the hydrogen peroxide produced by glucose oxidase as a substrate
Evaluate
The enzyme that catalyzes this reaction is a(n)
H
1000
CH3
Acetaldehyde
Otransferase
NADH + H+
ligase
Olyase
oxidoreductase
hydrolase
alcohol
dehydrogenase
NAD+
OH
CH2
CH3
Ethanol
Chapter 23 Solutions
Organic Chemistry (8th Edition)
Ch. 23.1 - Prob. 2PCh. 23.1 - Prob. 3PCh. 23.2 - How many conjugated double bonds are there in a....Ch. 23.2 - Instead of adding to the 4a position and...Ch. 23.2 - Prob. 7PCh. 23.3 - Prob. 8PCh. 23.3 - Acetolactate synthase is another TPP-requiring...Ch. 23.3 - Acetolactate synthase transfers the acyl group of...Ch. 23.3 - Prob. 12PCh. 23.5 - Which compound is more easily decarboxylated?
Ch. 23.5 - Prob. 14PCh. 23.5 - Explain why the ability of PLP to catalyze an...Ch. 23.5 - Explain why the ability of PLP to catalyze an...Ch. 23.5 - The enzyme that catalyzes the C C bond cleavage...Ch. 23.5 - Propose a mechanism for the ,-elimination reaction...Ch. 23.6 - Ethanolamine ammonia lyase, a coenzyme...Ch. 23.6 - Prob. 20PCh. 23.7 - How do the structure of tetrahydrofolate and...Ch. 23.7 - What is the source of the methyl group in...Ch. 23.8 - Thiols such as ethanethiol and propanethiol can be...Ch. 23 - How does the metal ion in carboxypeptidase A...Ch. 23 - Prob. 24PCh. 23 - Prob. 25PCh. 23 - For each of the following reactions, name both the...Ch. 23 - Prob. 27PCh. 23 - When transaminated, the three branched-chain amino...Ch. 23 - What acyl groups have we seen transferred by...Ch. 23 - Propose a mechanism for the following reaction:Ch. 23 - Draw the products of the following reaction, where...Ch. 23 - When UMP is dissolved in T2O, exchange of T for H...Ch. 23 - Dehydratase is a PLP-requiring enzyme that...Ch. 23 - In addition to the reaction mentioned in Section...Ch. 23 - PLP can catalyze both ,-elimination reactions...Ch. 23 - The glycine cleavage system is a group of four...Ch. 23 - Prob. 37PCh. 23 - FADH2 reduces , -unsaturated thioesters to...
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- Use the name of the enzyme and any coenzyme to predict the products of this reaction. 0 OH NAD 2- LOPO, glyceraldehyde 3-phosphate dehydrogenasearrow_forwardFor the following reactions, name both the enzyme that catalyzes the reaction and the required coenzyme:arrow_forwardGive the name of the enzyme that will most likely catalyze each of the following reactions: O CH3 - CH2 - OH + NAD+ → CH3 – C – H + NADH + H+ Ans. ___________________________________________ CH3 – C – COOH + R – CH – COOH → CH3 – CH – COOH + R – C – COOH O NH2 NH2 O HO – C – CH – CH2 – C – OH → HO – C – CH = CH – C – OH + H2O O OH O O O CO2 + CH3 – C – C – OH + ATP → HO – C – CH2 – C – C – OH + ADP + Pi O O O O…arrow_forward
- If an enzyme-catalyzed reaction has a high rate at low pH and low rate at higher pH, this implies that a group on either the enzyme or the substrate must be for an efficient reaction. leaving group oxidoreductase coenzymes O protonated deprotonated The compound that consists of deoxyribose linked by an N-glycosidic bond to N-9 of guanine is: adenylate deoxyguanosine guanosine nucleotide guanylatearrow_forwardTPP is a coenzyme for transketolase, the enzyme that catalyzes the conversion of a ketopentose (xylulose5-phosphate) and an aldopentose (ribose-5-phosphate) to an aldotriose (glyceraldehyde-3-phosphate) and a ketoheptose (sedoheptulose-7-phosphate). Notice that the total number of carbons in the reactants and products is the same (5 + 5 = 3 + 7). Propose a mechanism for this reaction.arrow_forwardGlycerol-3-phosphatase catalyzes the hydrolysis of glycerol-3-phosphate according to the following reaction.Glycerol-3-P + H₂O ⇌ glycerol + Pi When the enzyme is added to a solution of 1.25 M glycerol-3-phosphate at 25.0°C, and the reaction proceeds to equilibrium, the equilibrium concentration of glycerol-3-phosphate is 3.60×10⁻² M. Calculate the standard free energy of hydrolysis of glycerol-3-phosphate.arrow_forward
- What class of enzyme catalyzes each of the following reactions?arrow_forwardThe rate-limiting step is a metabolic pathway is the slowest step which determines the overall rate of the other reactions in the pathway. In glycolysis, the rate limiting step is a phosphorylation reaction where phosphofructokinase (PFK-1) catalyzes the reaction fructose-6-bisphosphate -> fructose-1,6-bisphosphate, the same step in gluconeogenesis. Select one: The statement is FALSE. The statement is TRUE.arrow_forwardThe enzyme that catalyzes the following reaction belongs to which class? is-l O Lyase Isomerase Oxidoreductase O Hydrolase OHarrow_forward
- Identify the most likely additional substrates, products, and coenzymes for each reaction in the following imaginary pathway.arrow_forwardGluconeogenesis in humans involves many of the enzymes of glycolysis working in a reverse direction, but utilizes four unique enzymes. (a) Draw these four reactions at pH 7, indicating the reactants and products, and the full name of the enzyme. You are required to draw the structures of the products and reactants for the first two reactions in gluconeogenesis and their full names but only provide the full names on the remaining two reactions. You do not have to draw the structures of any cofactors just use their abbreviations.arrow_forwardTo what main class of enzymes does the enzyme that catalyzes the following reaction belong? 1- isomerase lyase oxidoreductase hydrolase transferase OH O™arrow_forward
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