Question 1

Which of the following statements concerning the compound urea is incorrect?

Accepted Answer

A)   It is a white solid in the pure state.
B)   It is very soluble in water.
C)   It gives urine its odor and color.
D)   More than one correct response.
E)   No correct response.F) None of the above
G) B) and C)

Question 2

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1)  The source for both nitrogen atoms in a urea molecule is carbamoyl phosphate.
(2)  In the second stage of amino acid degradation, ammonium ion is liberated from glutamate through oxidative deamination.
(3)  Dietary protein intake and protein turnover are the body's only sources for providing amino acids for the amino acid pool.

Accepted Answer

A)   All three statements are true.
B)   Two of the three statements are true.
C)   Only one of the statements is true.
D)   None of the statements is true.E) A) and D)
F) C) and D)

Question 3

The most abundant amino acid in the amino acid pool is

Accepted Answer

A)   alanine
B)   aspartate
C)   cysteine
D)   glutamateE) B) and C)
F) A) and D)

Question 4

Use the following to answer the questions below:
Following are reactants and the type of reaction they undergo. From the response list, select the product to which each reactant is converted. Responses may be used more than once or need not be used at all.

-Transamination involving glutamate

Accepted Answer

A)   alanine
B)   aspartate
C)   glutamate
D)   (-ketoglutarate) E) All of the above
F) None of the above

Question 5

Use the following to answer the questions below:
In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all.

-Arginine-ornithine

Accepted Answer

A)   Nitrogen content remains the same.
B)   Nitrogen content increases by one atom.
C)   Nitrogen content increases by two atoms.
D)   Nitrogen content decreases by two atoms.E) B) and D)
F) A) and B)

Question 6

Use the following to answer the questions below:
For each of the urea cycle characterizations, select a correct response from the response list. Responses may be used more than once or need not be used at all.

-Reacts with H2O to produce urea

Accepted Answer

A)   ornithine
B)   citrulline
C)   argininosuccinate
D)   arginineE) C) and D)
F) B) and D)

Question 7

If aspartate is a reactant in a transamination reaction, one of the products of the reaction must be

Accepted Answer

A)   alanine
B)   oxaloacetate
C)   asparagine
D)   pyruvateE) C) and D)
F) A) and D)

Question 8

Use the following to answer the questions below:
For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all.

-Buildup of this substance in the blood produces jaundice.

Accepted Answer

A)  translation phase of protein synthesis
B)  transcription phase of protein synthesis
C)  replication of DNA
D)  post-transcription phase of protein synthesisE) B) and C)
F) None of the above

Question 9

The dominant use for the amino acids of the amino acid pool is the synthesis of

Accepted Answer

A)   protein
B)   nonprotein nitrogen compounds
C)   nonessential amino acids
D)   pyruvate for energy productionE) All of the above
F) A) and B)

Question 10

Use the following to answer the questions below:
For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all.

-Substance that gives feces its characteristic color

Accepted Answer

A)  translation phase of protein synthesis
B)  transcription phase of protein synthesis
C)  replication of DNA
D)  post-transcription phase of protein synthesisE) B) and D)
F) A) and C)

Question 11

Use the following to answer the questions below:
In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all.

-Ammonium ion-carbamoyl phosphate

Accepted Answer

A)   Nitrogen content remains the same.
B)   Nitrogen content increases by one atom.
C)   Nitrogen content increases by two atoms.
D)   Nitrogen content decreases by two atoms.E) All of the above
F) A) and D)

Question 12

Which of the following is a reactant in oxidative deamination?

Accepted Answer

A)   water
B)   ammonium ion
C)   NADH
D)   more than one correct response
E)   no correct responseF) D) and E)
G) A) and D)

Question 13

Which of the following compounds is a urea cycle intermediate?

Accepted Answer

A)   carbamoyl phosphate
B)   aspartate
C)   ornithine
D)   more than one correct response
E)   no correct responseF) A) and B)
G) C) and D)

Question 14

Which of the following is a product in oxidative deamination of glutamate?

Accepted Answer

A)   oxaloacetate
B)   water
C)   pyruvate
D)   more than one correct response
E)   no correct responseF) D) and E)
G) None of the above

Question 15

Use the following to answer the questions below:
For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity.

-Both fumarate and oxaloacetate

Accepted Answer

A)   ketogenic but not glucogenic
B)   glucogenic but not ketogenic
C)   both ketogenic and glucogenic
D)   neither ketogenic nor glucogenicE) A) and D)
F) A) and C)

Question 16

Use the following to answer the questions below:
For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity.

-Succinyl CoA only

Accepted Answer

A)   ketogenic but not glucogenic
B)   glucogenic but not ketogenic
C)   both ketogenic and glucogenic
D)   neither ketogenic nor glucogenicE) A) and C)
F) B) and C)

Question 17

Use the following to answer the questions below:
For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity.

-Both acetyl CoA and acetoacetyl CoA

Accepted Answer

A)   ketogenic but not glucogenic
B)   glucogenic but not ketogenic
C)   both ketogenic and glucogenic
D)   neither ketogenic nor glucogenicE) A) and C)
F) A) and B)

Question 18

Use the following to answer the questions below:
In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all.

-Carbamoyl phosphate-citrulline

Accepted Answer

A)   Nitrogen content remains the same.
B)   Nitrogen content increases by one atom.
C)   Nitrogen content increases by two atoms.
D)   Nitrogen content decreases by two atoms.E) A) and C)
F) B) and D)

Question 19

Which of the following statements concerning the degradation of amino acid carbon "skeletons" is correct?

Accepted Answer

A)   Each of the 20 standard amino acids gives a different degradation product.
B)   Each of the 20 standard amino acids gives the same degradation product.
C)   All final degradation products are citric acid cycle intermediates.
D)   Some, but not all, final degradation products are citric acid cycle intermediates.E) B) and C)
F) B) and D)

Question 20

Use the following to answer the questions below:
In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all.

-Arginine-urea

Accepted Answer

A)   Nitrogen content remains the same.
B)   Nitrogen content increases by one atom.
C)   Nitrogen content increases by two atoms.
D)   Nitrogen content decreases by two atoms.E) B) and C)
F) A) and D)

Exam 26: Protein Metabolism

Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Both acetyl CoA and acetoacetyl CoA

Correct Answer
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Which of the following is a product in oxidative deamination of glutamate?

Correct Answer
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Use the following to answer the questions below: For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all. -Substance that gives feces its characteristic color

Correct Answer
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Use the following to answer the questions below: For each of the urea cycle characterizations, select a correct response from the response list. Responses may be used more than once or need not be used at all. -Reacts with H₂O to produce urea

Correct Answer
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The most abundant amino acid in the amino acid pool is

Correct Answer
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Use the following to answer the questions below: Following are reactants and the type of reaction they undergo. From the response list, select the product to which each reactant is converted. Responses may be used more than once or need not be used at all. -Transamination involving glutamate

Correct Answer
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If aspartate is a reactant in a transamination reaction, one of the products of the reaction must be

Correct Answer
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Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Succinyl CoA only

Correct Answer
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Which of the following statements concerning the degradation of amino acid carbon "skeletons" is correct?

Correct Answer
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Which of the following is a reactant in oxidative deamination?

Correct Answer
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Which of the following statements concerning the compound urea is incorrect?

Correct Answer
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Use the following to answer the questions below: In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all. -Arginine-urea

Correct Answer
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Use the following to answer the questions below: For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all. -Buildup of this substance in the blood produces jaundice.

Correct Answer
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The dominant use for the amino acids of the amino acid pool is the synthesis of

Correct Answer
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Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Both fumarate and oxaloacetate

Correct Answer
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Which of the following compounds is a urea cycle intermediate?

Correct Answer
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Exam 26: Protein Metabolism

Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Both acetyl CoA and acetoacetyl CoA

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is a product in oxidative deamination of glutamate?

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all. -Substance that gives feces its characteristic color

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the urea cycle characterizations, select a correct response from the response list. Responses may be used more than once or need not be used at all. -Reacts with H2O to produce urea

Correct AnswerverifiedShow Answer

The most abundant amino acid in the amino acid pool is

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: Following are reactants and the type of reaction they undergo. From the response list, select the product to which each reactant is converted. Responses may be used more than once or need not be used at all. -Transamination involving glutamate

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If aspartate is a reactant in a transamination reaction, one of the products of the reaction must be

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Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Succinyl CoA only

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Which of the following statements concerning the degradation of amino acid carbon "skeletons" is correct?

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Which of the following is a reactant in oxidative deamination?

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Which of the following statements concerning the compound urea is incorrect?

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Use the following to answer the questions below: In each of the following reactant-product combinations associated with the production of urea, contrast the nitrogen content of the two compounds using the response list. Responses may be used more than once or need not be used at all. -Arginine-urea

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For each of the heme degradation characterizations, select a correct degradation product from the response list. Responses may be used more than once or need not be used at all. -Buildup of this substance in the blood produces jaundice.

Correct AnswerverifiedShow Answer

The dominant use for the amino acids of the amino acid pool is the synthesis of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Use the following to answer the questions below: For the degradation products found for a particular amino acid carbon skeleton, use the response list to characterize the amino acid in terms of ketogenicity and glucogenicity. -Both fumarate and oxaloacetate

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Which of the following compounds is a urea cycle intermediate?

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Use the following to answer the questions below: For each of the urea cycle characterizations, select a correct response from the response list. Responses may be used more than once or need not be used at all. -Reacts with H₂O to produce urea

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