Four compounds within citric acid cycle that the carbon skeletons of the glucogenic amino acid enter has to be identified. Concept introduction: The citric acid cycle includes a series of oxidation-reduction reactions in mitochondria that results in the oxidation of an acetyl group to two molecules of carbon dioxide and reduce the coenzymes that are reoxidized through the electron transport chain, linked to the formation of ATP Amino acids that are converted to a c e t o a c e t y l − C o A or a c e t y l − C o A then enter the ketogenesis pathway are called ketogenic amino acids. The amino acids that proceed by way of oxaloacetate to gluconeogenesis pathway are called glucogenic amino acids.

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Chapter 25, Problem 25.44CP

(a)

Interpretation Introduction

Interpretation:

Four compounds within citric acid cycle that the carbon skeletons of the glucogenic amino acid enter has to be identified.

Concept introduction:

The citric acid cycle includes a series of oxidation-reduction reactions in mitochondria that results in the oxidation of an acetyl group to two molecules of carbon dioxide and reduce the coenzymes that are reoxidized through the electron transport chain, linked to the formation of ATP

Amino acids that are converted to acetoacetyl−CoA or acetyl−CoA then enter the ketogenesis pathway are called ketogenic amino acids.

The amino acids that proceed by way of oxaloacetate to gluconeogenesis pathway are called glucogenic amino acids.

(b)

Interpretation Introduction

Interpretation:

Out of the four compounds, the one which arises exclusively from aromatic amino acids has to be identified.

Concept introduction:

The citric acid cycle includes a series of oxidation-reduction reactions in mitochondria that results in the oxidation of an acetyl group to two molecules of carbon dioxide and reduce the coenzymes that are reoxidized through the electron transport chain, linked to the formation of ATP

Amino acids that are converted to acetoacetyl−CoA or acetyl−CoA then enter the ketogenesis pathway are called ketogenic amino acids.

The amino acids that proceed by way of oxaloacetate to gluconeogenesis pathway are called glucogenic amino acids.

Aromatic amino acids include phenylalanine and tyrosine.

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