Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Textbook Question
Chapter 21, Problem 19RE
MATHEMATICAL Calculate the net ATP yield from oleic acid
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ENZYME KINETICS ANALYSIS
of 6
Xanthine oxidase (XO) is the enzyme that catalyzes the synthesis of uric acid, which in excess
causes gouty arthritis. The inhibition of this enzyme is therefore critical in its treatment. A student
researcher is investigating the inhibitory effects of kaempferol (Kmp) and chlorogenic acid (Cha) on XO
which uses xanthine (Xan) as substrate. Table 1 below shows the enzyme kinetic data. Construct the
Lineweaver-Burk plot complete with the linear regression analvsis. Fill in the needed information on Table
2 and paste a copy of your Lineweaver-Burk plot. submit the picture of your output in PNG or JPG format.
Table 1. Enzyme Kinetic Data
Velocity, mM/s
[S], mM
Хan
Kmp
Cha
0.492
0.0678
0.0351
0.0615
0.211
0.0531
0.0261
0.0451
0.087
0.0298
0.0157
0.0211
0.048
0.0195
0.0091
0.0142
0.029
0.0127
0.0067
0.0081
Table 2. Enzyme Kinetic Parameters
Xanthine
Kaempferol
Chlorogenic acid
Parameters
Vmax
Км
Type of Inhibition
Mode of Binding
NA
NA
Lineweaver-Burk Plot
61. MATHEMATICAL For the following aspartase reaction (see Ques-
tion 28) in the presence of the inhibitor hydroxymethylaspar-
tate, determine K and whether the inhibition is competitive or
noncompetitive.
[S]
(molarity)
V, No Inhibitor
(arbitrary units)
V, Inhibitor Present
(same arbitrary units)
:21×10¹01 0.026 TOIV 0.0109 9
5 X 10
0.092
0.040
0.086
0.120
10-3
IPO?
2.5 10-³
5×10 211 0.150 09M
ein
5 X 10-3
0.165
20 mys
0.142
Chapter 21 Solutions
Biochemistry
Ch. 21 - REFLECT AND APPLY (a) The major energy storage...Ch. 21 - RECALL What is the difference between...Ch. 21 - RECALL How are lipases activated hormonally?Ch. 21 - RECALL What is the metabolic purpose of linking a...Ch. 21 - RECALL Outline the role of carnitine in the...Ch. 21 - RECALL What is the difference between the type of...Ch. 21 - RECALL Draw a six-carbon saturated fatty acid and...Ch. 21 - REFLECT AND APPLY Why does the degradation of...Ch. 21 - REFLECT AND APPLY Given the nature of the hormonal...Ch. 21 - RECALL Compare the energy yields from the...
Ch. 21 - RECALL Which generates more ATPthe processing of...Ch. 21 - MATHEMATICAL Calculate the ATP yield for the...Ch. 21 - REFLECT AND APPLY It is frequently said that...Ch. 21 - RECALL Describe briefly how -oxidation of an...Ch. 21 - RECALL You hear a fellow student say that the...Ch. 21 - RECALL What are the unique enzymes needed to...Ch. 21 - RECALL What are the unique enzymes needed to...Ch. 21 - MATHEMATICAL Calculate the net ATP yield from the...Ch. 21 - MATHEMATICAL Calculate the net ATP yield from...Ch. 21 - MATHEMATICAL Calculate the net ATP yield from...Ch. 21 - REFLECT AND APPLY How many cycles of -oxidation...Ch. 21 - REFLECT AND APPLY It has been stated many times...Ch. 21 - RECALL Under what conditions are ketone bodies...Ch. 21 - RECALL Briefly outline the reactions involved in...Ch. 21 - REFLECT AND APPLY Why might a doctor smell the...Ch. 21 - REFLECT AND APPLY Why might a person who is an...Ch. 21 - REFLECT AND APPLY A friend who is trying to lose...Ch. 21 - RECALL Compare and contrast the pathways of fatty...Ch. 21 - RECALL Outline the steps involved in the...Ch. 21 - RECALL What is the metabolic importance of...Ch. 21 - RECALL In fatty acid degradation, we encounter...Ch. 21 - RECALL How are the two redox reactions of...Ch. 21 - RECALL How is ACP similar to coenzyme A? How is it...Ch. 21 - RECALL What is the purpose of having ACP as a...Ch. 21 - RECALL Why are linoleate and linolenate considered...Ch. 21 - REFLECT AND APPLY Is it possible to convert fatty...Ch. 21 - REFLECT AND APPLY What is the role of citrate in...Ch. 21 - REFLECT AND APPLY In the mitochondrion is a...Ch. 21 - REFLECT AND APPLY In fatty acid synthesis,...Ch. 21 - REFLECT AND APPLY (a) Where in an earlier chapter...Ch. 21 - RECALL What is the source of the glycerol in...Ch. 21 - RECALL What is the activating group used in the...Ch. 21 - RECALL What are the differences between synthesis...Ch. 21 - RECALL How are isoprene units important in...Ch. 21 - RECALL A cholesterol sample is prepared using...Ch. 21 - Prob. 46RECh. 21 - Prob. 47RECh. 21 - Prob. 48RECh. 21 - Prob. 49RECh. 21 - REFLECT AND APPLY A drug that reduces blood...Ch. 21 - RECALL What role does neuropeptide Y play in...Ch. 21 - Prob. 52RECh. 21 - Prob. 53RECh. 21 - Prob. 54RECh. 21 - RECALL What is the connection between insulin and...
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- RECALL How many enzymes are involved in mammalian pyruvate dehydrogenase? What are their functions?arrow_forwardREFLECT AND APPLLY Show how the estimate of 33% efficiency of energy use in anaerobic glycolysis is derived.arrow_forwardMATHEMATICAL Calculate the net ATP yield from the complete processing of a saturated fatty acid containing 17 carbons. Consider the -oxidation steps, processing of acetyl-CoA through the citric acid cycle, and electron transport.arrow_forward
- MATHEMATICAL For the following aspartase reaction (see Question 28) in the presence of the inhibitor hydroxymethylaspartate, determine KM and whether the inhibition is competitive or noncompetitive. [s](molarity)V,noInhibitor(arbitraryunits)V,InhibitorPresent(samearbitraryunits)110451041.5103510311.00.0260.0920.1360.1659.520.0100.0400.0860.1427.60arrow_forwardRECALL What is the difference between the type of oxidation catalyzed by acyl-CoA dehydrogenase and that catalyzed by -hydroxy-CoA dehydrogenase?arrow_forwardMATHEMATICAL Calculate the ATP yield for the complete oxidation of one molecule of palmitic acid (16 carbons). How does this figure differ from that obtained for stearic acid (18 carbons)?arrow_forward
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