Concept explainers
(a)
To explain: The reason that the amino acid which broken down to intermediates of citric acid cycle cannot be directly oxidized to CO2 by citric acid cycle.
Concept introduction: The cellular mechanism is highly efficient to utilize the resources properly. Intermediate metabolites are a part of the cycle, which are required to continue the sequence of reactions. They do not get used in the reaction until it escapes from the sequence of reaction.
(b)
To explain: Why the amino acid that is broken down to pyruvates can be directly oxidized to CO2 by citric acid cycle.
Concept introduction: The cellular mechanism is highly efficient to utilize the resources properly. Intermediate metabolites are a part of the cycle, which are required to continue the sequence of reactions. They do not get used in the reaction until it escapes from the sequence of reaction.
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