
Concept explainers
(a)
Interpretation:
The reaction [3a] needs to be classified as oxidation, reduction or decarboxylation.
Concept Introduction:
During oxidation of compound electrons or hydrogens are lost or oxygen is gained. During the reduction of a compound, electrons or hydrogens are gained or oxygen is lost. Coenzymes act as oxidizing agents or reducing agents. Oxidizing agent drives the oxidation reaction and gets reduced. Reducing agent drives reduction reactions and gets oxidized. Decarboxylation is a reaction that removes the carboxyl group of a compound as CO2.
(b)
Interpretation:
The reaction [3b] needs to be classified as an oxidation, reduction or decarboxylation.
Concept Introduction:
During oxidation of compound electrons or hydrogens are lost or oxygen is gained. During the reduction of a compound, electrons or hydrogens are gained or oxygen is lost. Coenzymes act as oxidizing agents or reducing agents. Oxidizing agent drives the oxidation reaction and gets reduced. Reducing agent drives reduction reactions and gets oxidized. Decarboxylation is a reaction that removes the carboxyl group of a compound as CO2.
(c)
Interpretation:
The step in which NAD+ is necessary needs to be determined.
Concept Introduction:
A coenzyme is a compound which involves in enzyme-catalyzed reactions. Some coenzymes act as oxidizing or reducing agents.
(d)
Interpretation:
The reason due to which enzyme that catalyzes the given reaction is called isocitrate dehydrogenase needs to be explained.
Concept Introduction:
Dehydrogenase is a class of enzymes that catalyzes the removal of hydrogens from a molecule.

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Chapter 23 Solutions
General, Organic, & Biological Chemistry
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