
Concept explainers
(a)
Interpretation: To classify carbamoyl phosphate in terms of nitrogen content as
Concept introduction: Carbamoyl phosphate is an intermediate or one of the fuel for the urea cycle. Ammonium ion produced via oxidative deamination reaction is converted into the carbamoyl phosphate which then enters the urea cycle.
The carbamoyl phosphate formation reaction is carried out in the mitochondrial matrix. Carbamoyl is the prefix used to represent an amide group. Thus carbamoyl phosphate is a molecule that contains a phosphate group attached to an amide
Depending upon the number of nitrogen atom present in the structure of the compound it can be classified as
(a)

Answer to Problem 15.75EP
Carbamoyl phosphate is a
Explanation of Solution
Carbamoyl phosphate and aspartate are fuel for the urea cycle. The structure of carbamoyl phosphate is:
It contains only one nitrogen atom thus carbamoyl phosphate is characterized as
(b)
Interpretation: To classify glutamate in terms of nitrogen content as
Concept introduction: Glutamate is conjugate anion of glutamic acid. Glutamic acid is an amino acid. Depending upon the number of nitrogen atom present in the structure of the compound it can be classified as
(b)

Answer to Problem 15.75EP
Glutamate is a
Explanation of Solution
The structure of glutamate is:
It contains only one nitrogen atom thus glutamate is characterized a
(c)
Interpretation: To characterize urea in terms of nitrogen content as
Concept introduction: The nitrogenous product of protein
Depending upon the number of nitrogen atom present in the structure of the compound it can be classified as
(c)

Answer to Problem 15.75EP
Urea is a
Explanation of Solution
The structure of urea is:
The structure of urea suggests the presence of two
(d)
Interpretation: To characterize citrulline in terms of nitrogen content as
Concept introduction: Citrulline is a nonstandard amino acid and is an inetrmediate in the the urea cycle. It is encountered at step 2 of the urea cycle and undergo condensation reaction with aspartate to give argininosuccinate.
Depending upon the number of nitrogen atom present in the structure of the compound it can be classified as
(d)

Answer to Problem 15.75EP
Citrulline is a
Explanation of Solution
The structure of citrulline is:
Citrulline contains three nitrogen atoms and thus it is characterized as a
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Chapter 15 Solutions
Organic And Biological Chemistry
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