Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 20, Problem 40RE
Interpretation Introduction
Interpretation:
The role of uncouplers in oxidative phosphorylation is to be explained.
Concept introduction:
Uncouplers can be defined as substances that uncouple phosphorylation of ADP from electron transfer and dissociate the synthesis of ATP from the transport of electrons through the cytochrome system.
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ENZYME KINETICS ANALYSIS
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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
Using a biochemical map and text describe the process by which lactate is recycled from the
muscle to liver for gluconeogenesis during high intensity exercise (e.g. a soccer match).
Chapter 20 Solutions
Biochemistry
Ch. 20 - RECALL Briefly summarize the steps in the electron...Ch. 20 - RECALL Are electron transport and oxidative...Ch. 20 - Prob. 3RECh. 20 - REFLECT AND APPLY Show how the reactions of the...Ch. 20 - REFLECT AND APPLY How does mitochondrial structure...Ch. 20 - Prob. 6RECh. 20 - Prob. 7RECh. 20 - MATHEMATICAL Using the information in Table 20.2,...Ch. 20 - Prob. 9RECh. 20 - Prob. 10RE
Ch. 20 - MATHEMATICAL Calculate E for the following...Ch. 20 - Prob. 12RECh. 20 - MATHEMATICAL Which is more favorable...Ch. 20 - REFLECT AND APPLY Comment on the fact that the...Ch. 20 - RECALL What do cytochromes have in common with...Ch. 20 - RECALL How do the cytochromes differ from...Ch. 20 - RECALL Which of the following does not play a role...Ch. 20 - Prob. 18RECh. 20 - Prob. 19RECh. 20 - REFLECT AND APPLY Two biochemistry students are...Ch. 20 - REFLECT AND APPLY Cytochrome oxidase and...Ch. 20 - Prob. 22RECh. 20 - REFLECT AND APPLY Reflect on the evolutionary...Ch. 20 - REFLECT AND APPLY Experimental evidence strongly...Ch. 20 - Prob. 25RECh. 20 - REFLECT AND APPLY What is the advantage of having...Ch. 20 - REFLECT AND APPLY Why do the electron-transfer...Ch. 20 - Prob. 28RECh. 20 - Prob. 29RECh. 20 - Prob. 30RECh. 20 - RECALL Describe the role of the F1 portion of ATP...Ch. 20 - Prob. 32RECh. 20 - Prob. 33RECh. 20 - Prob. 34RECh. 20 - REFLECT AND APPLY What is the approximate P/O...Ch. 20 - REFLECT AND APPLY Why is it difficult to determine...Ch. 20 - REFLECT AND APPLY What are some of the...Ch. 20 - RECALL Briefly summarize the main arguments of the...Ch. 20 - Prob. 39RECh. 20 - Prob. 40RECh. 20 - Prob. 41RECh. 20 - Prob. 42RECh. 20 - REFLECT AND APPLY Criticize the following...Ch. 20 - Prob. 44RECh. 20 - Prob. 45RECh. 20 - Prob. 46RECh. 20 - RECALL How does the yield of ATP from complete...Ch. 20 - REFLECT AND APPLY The malate-aspartate shuttle...Ch. 20 - MATHEMATICAL What yield of ATP can be expected...Ch. 20 - MATHEMATICAL The free-energy change (G) for the...
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- REFLECT AND APPLY The intermediates of glycolysis are phosphorylated, but those of the citric acid cycle are not. Suggest a reason why.arrow_forwardREFLECT AND APPLLY High levels of glucose-6-phosphate inhibit glycolysis. If the concentration of glucose-6-phosphate decreases, activity is restored. Why?arrow_forwardBIOCHEMICAL CONNECTIONS How do the KM values for glucokinase and hexokinase reflect their roles in sugar metabolism?arrow_forward
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