Concept explainers
Interpretation:
The overall exergonic reaction of the citric cycle is to be shown despite the fact that some of the reactions in the citric acid cycle are endergonic in nature.
Concept introduction:
The citric acid cycle, also known as the tricarboxylic acid cycle, is an important part of the aerobic respiration that takes place inside the mitochondria.
Gibbs free energy change or standard free energy change is the amount of energy released after a
An endergonic chemical reaction is one that absorbs energy in the form of heat and an exergonic reaction is one that releases energy.
Answer to Problem 40RE
Solution: Though one reaction in the citric acid cycle is endergonic in nature, the overall citric acid cycle is exergonic, because the overall standard free change is
Explanation of Solution
Given information:
The table for individual reactions of the citric acid cycle is as follows:
Any given
As observed from the table, the value of standard free energy change for the oxidation of malate into OAA is
The overall value of standard free energy change for a citric acid cycle is obtained by subtracting the
There is an endergonic reaction in the citric acid cycle in which malate is converted into OAA; however, the overall citric acid cycle is exergonic in nature because the overall free energy change of the cycle is
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Chapter 19 Solutions
Biochemistry
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- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning