Question 1

Myristic acid, a C14 fatty acid, undergoes the β-oxidation cycle __________ times.

Accepted Answer

A)   2
B)   4
C)   6
D)   7
E)   14F) B) and E)
G) A) and B)

Question 2

The heart muscle's primary source of fuel is

Accepted Answer

A)   glucose.
B)   fatty acids.
C)   amino acids.
D)   glycogen.
E)   lactate.F) A) and B)
G) A) and C)

Question 3

The initial digestion of protein is catalyzed by an enzyme called

Accepted Answer

A)   chymotrypsin.
B)   peptidase.
C)   pepsin.
D)   amylase.
E)   trypsin.F) C) and E)
G) C) and D) C

Question 4

The series of reactions that produces energy by hydrolyzing fats to units of acetyl CoA is called

Accepted Answer

A)   transamination.
B)   β oxidation.
C)   hydration.
D)   hydrolysis.
E)   β reduction.F) None of the above
G) B) and D)

Question 5

Each acetyl CoA produces __________ ATP in the citric acid cycle.

Accepted Answer

A)   2
B)   6
C)   10
D)   12
E)   24F) A) and C)
G) None of the above

Question 6

Fatty acids and glycerol are produced from the metabolism of

Accepted Answer

A)   lipids.
B)   proteins.
C)   carbohydrates.
D)   amino acids.
E)   glucose.F) A) and B)
G) A) and E)

Question 7

Malonyl CoA contains a 3-carbon compound used in

Accepted Answer

A)   lipogenesis.
B)   acetyl CoA formation.
C)   gluconeogenesis.
D)   glycogenolysis.
E)   the citric acid cycle.F) A) and B)
G) A) and E)

Question 8

The 2-carbon segments removed from a fatty acid during metabolism are used to form

Accepted Answer

A)   glucose.
B)   pyruvate.
C)   lactate.
D)   CoA.
E)   acetyl CoA.F) C) and D)
G) A) and E)

Question 9

Identify each of the following metabolic pathways.
-the removal of an amino group as NH4+ from glutamic acid to yield α-ketoglutaric acid

Accepted Answer

A)  ketogenesis
B)  transamination
C)  β oxidation
D)  lipogenesis
E)  oxidative deaminationF) A) and E)
G) C) and E) E

Question 10

In mammals, the ammonium ion produced in oxidative deamination is

Accepted Answer

A)   excreted in the feces.
B)   stored in the liver.
C)   converted to uric acid, which is excreted in the urine.
D)   converted to urea, which is excreted in the urine.
E)   converted to uric acid, which is excreted by the liver.F) B) and E)
G) A) and D)

Question 11

Acyl carrier protein is used in fatty acid synthesis.

Accepted Answer

A) True 
 B)False

Question 12

The function of fatty acyl CoA is to

Accepted Answer

A)   activate a fatty acid for metabolism.
B)   produce a 2-carbon segment for metabolism.
C)   isomerize cis fatty acids.
D)   cross the blood-brain barrier.
E)   produce a lipoprotein.F) C) and D)
G) B) and C)

Question 13

Identify each of the following metabolic pathways.
-the production of ketone bodies

Accepted Answer

A)  ketogenesis
B)  transamination
C)  β oxidation
D)  lipogenesis
E)  oxidative deaminationF) C) and D)
G) A) and E)

Question 14

Most of the glycerol produced by fatty acid breakdown goes to the

Accepted Answer

A)   pancreas.
B)   gall bladder.
C)   liver.
D)   small intestine.
E)   brain.F) C) and D)
G) A) and B)

Question 15

The production of new triacylglycerols is termed ketogenesis.

Accepted Answer

A) True 
 B)False

Question 16

The production of new fatty acids is called

Accepted Answer

A)   gluconeogenesis.
B)   β oxidation.
C)   transesterification.
D)   oxidation.
E)   lipogenesis.F) B) and E)
G) A) and D) E

Question 17

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation.

Accepted Answer

A) True 
 B)False

Question 18

During complete oxidation of the fatty acid CH3(CH₂) 18COOH, __________ molecules of acetyl CoA are produced, and the fatty acid goes through the β-oxidation cycle __________ times.

Accepted Answer

A)   ten; ten
B)   nine; ten
C)   nine; nine
D)   nine; eight
E)   ten; nineF) A) and D)
G) C) and D)

Question 19

When excess acetyl CoA accumulates in the liver, a pathway called __________ is initiated.

Accepted Answer

A)   transamination
B)   glycolysis
C)   gluconeogenesis
D)   emulsification
E)   ketogenesisF) C) and E)
G) C) and D)

Question 20

Fats are higher in caloric value than carbohydrates because

Accepted Answer

A)   1 gram of fat produces significantly more ATP than 1 gram of glucose.
B)   fats can make use of the citric acid cycle.
C)   fats make use of β oxidation.
D)   1 gram of glucose weighs more than 1 gram of fat.
E)   1 gram of glucose contains more moles than 1 gram of fat.F) A) and D)
G) A) and B)

Exam 24: Metabolic Pathways for Lipids and Amino Acids

Myristic acid, a C14 fatty acid, undergoes the β-oxidation cycle __________ times.

Correct AnswerverifiedShow Answer

The heart muscle's primary source of fuel is

Correct AnswerverifiedShow Answer

The initial digestion of protein is catalyzed by an enzyme called

Correct AnswerverifiedC

The series of reactions that produces energy by hydrolyzing fats to units of acetyl CoA is called

Correct AnswerverifiedShow Answer

Each acetyl CoA produces __________ ATP in the citric acid cycle.

Correct AnswerverifiedShow Answer

Fatty acids and glycerol are produced from the metabolism of

Correct AnswerverifiedShow Answer

Malonyl CoA contains a 3-carbon compound used in

Correct AnswerverifiedShow Answer

The 2-carbon segments removed from a fatty acid during metabolism are used to form

Correct AnswerverifiedShow Answer

Identify each of the following metabolic pathways. -the removal of an amino group as NH4+ from glutamic acid to yield α-ketoglutaric acid

Correct AnswerverifiedE

In mammals, the ammonium ion produced in oxidative deamination is

Correct AnswerverifiedShow Answer

Acyl carrier protein is used in fatty acid synthesis.

Correct AnswerverifiedShow Answer

The function of fatty acyl CoA is to

Correct AnswerverifiedShow Answer

Identify each of the following metabolic pathways. -the production of ketone bodies

Correct AnswerverifiedShow Answer

Most of the glycerol produced by fatty acid breakdown goes to the

Correct AnswerverifiedShow Answer

The production of new triacylglycerols is termed ketogenesis.

Correct AnswerverifiedShow Answer

The production of new fatty acids is called

Correct AnswerverifiedE

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation.

Correct AnswerverifiedShow Answer

During complete oxidation of the fatty acid CH3(CH₂) 18COOH, __________ molecules of acetyl CoA are produced, and the fatty acid goes through the β-oxidation cycle __________ times.

Correct AnswerverifiedShow Answer

When excess acetyl CoA accumulates in the liver, a pathway called __________ is initiated.

Correct AnswerverifiedShow Answer

Fats are higher in caloric value than carbohydrates because

Correct AnswerverifiedShow Answer

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C

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Identify each of the following metabolic pathways. -the removal of an amino group as NH₄⁺ from glutamic acid to yield α-ketoglutaric acid

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E

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E

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During complete oxidation of the fatty acid CH₃(CH₂) 18COOH, molecules of acetyl CoA are produced, and the fatty acid goes through the β-oxidation cycle times.

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