Question 1

In the metabolism of fats,the fatty acids enter the reactions of the

Accepted Answer

A) "electron transport chain." 
B) "$\beta$-oxidation process." 
C) "glycolysis pathway." 
D) "citric acid cycle." 
A) "electron transport chain." 
B) "$\beta$-oxidation process." 
C) "glycolysis pathway." 
D) "citric acid cycle."

Question 2

Fatty acid chains are built up of uneven numbers of carbons,but are degraded in carbon pairs.

Accepted Answer

A) True 
 B)False

Question 3

The liver is the most important site for the biosynthesis of fatty acids and triglycerides.

Accepted Answer

A) True 
 B)False

Question 4

Oxidative deamination of an amino acid produces _____ .

Accepted Answer

A) urea 
B) CO2 & H2O 
C)    
D) aspartate 
A) urea 
B) CO2 & H2O 
C)    
D) aspartate

Question 5

Unlike amino acids and sugars,lipids are transported to the liver after initially passing through ____.

Accepted Answer

A) an artery 
B) the lymph system 
C) the adipose tissue 
D) the respiratory system 
A) an artery 
B) the lymph system 
C) the adipose tissue 
D) the respiratory system

Question 6

If an individual does not have a sufficient level of insulin in the blood,the uptake of glucose by the cells is inhibited.

Accepted Answer

A) True 
 B)False

Question 7

How many molecules of NADH are formed by the oxidation of a 6-carbon fatty acid?

Accepted Answer

A) 6 
B) 5 
C) 3 
D) 2 
A) 6 
B) 5 
C) 3 
D) 2

Question 8

Chylomicrons are aggregates of triglycerides,phosphoglycerides,and cholesterol complexed with proteins.

Accepted Answer

A) True 
 B)False

Question 9

Which of these is a direct fuel for the urea cycle?

Accepted Answer

A)    
B) glutamate 
C) carbamoyl phosphate 
D) pyruvate 
A)    
B) glutamate 
C) carbamoyl phosphate 
D) pyruvate

Question 10

The following reaction would occur during fat mobilization.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is NOT considered a source of amino acids in humans?

Accepted Answer

A) protein turnover 
B) transamination 
C) diet 
D) nitrogen fixation 
A) protein turnover 
B) transamination 
C) diet 
D) nitrogen fixation

Question 12

Identify the beta carbon in the following diagram.

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 13

Two of the ketone bodies are _____ .

Accepted Answer

A) acidic 
B) neutral 
C) basic 
D) basic or acidic 
A) acidic 
B) neutral 
C) basic 
D) basic or acidic

Question 14

The biosynthesis of amino acids takes place mostly in the liver.

Accepted Answer

A) True 
 B)False

Question 15

In the fatty acid synthetase system,acetyl CoA is converted back into a fatty acid.How many acetyl CoAs are used in making a 18 carbon fatty acid?

Accepted Answer

A) 10 
B) 9 
C) 18 
D) 36 
A) 10 
B) 9 
C) 18 
D) 36

Question 16

Ketogenic amino acids cannot be converted into _____ .

Accepted Answer

A) fatty acids 
B) glucose 
C) ketone bodies 
D) acetyl CoA 
A) fatty acids 
B) glucose 
C) ketone bodies 
D) acetyl CoA

Question 17

A chylomicron is a type of lipoprotein,produced from using fat in digested food.

Accepted Answer

A) True 
 B)False

Question 18

While the brain cannot use fatty acids as an energy source due to the blood-brain barrier,red blood cell cannot use fatty acids because they lack mitochondria.

Accepted Answer

A) True 
 B)False

Question 19

Amino acids of the amino acid pool can be supplied by

Accepted Answer

A) dietary amino acids. 
B) the breakdown of tissue proteins. 
C) synthesis of nonessential amino acids. 
D) More than one response is correct. 
A) dietary amino acids. 
B) the breakdown of tissue proteins. 
C) synthesis of nonessential amino acids. 
D) More than one response is correct.

Question 20

Which of the following statements is correct with reference to cholesterol?

Accepted Answer

A) Cholesterol is a lipid that can be found in the blood. 
B) Cholesterol is not soluble and water and will precipitate out of the blood 
C) Cholesterol is important in the formation of cell membranes. 
D) All of these responses are correct. 
A) Cholesterol is a lipid that can be found in the blood. 
B) Cholesterol is not soluble and water and will precipitate out of the blood 
C) Cholesterol is important in the formation of cell membranes. 
D) All of these responses are correct.

Exam 24: Lipid and Amino Acid Metabolism

In the metabolism of fats,the fatty acids enter the reactions of the

Fatty acid chains are built up of uneven numbers of carbons,but are degraded in carbon pairs.

The liver is the most important site for the biosynthesis of fatty acids and triglycerides.

Oxidative deamination of an amino acid produces _____ .

Unlike amino acids and sugars,lipids are transported to the liver after initially passing through ____.

If an individual does not have a sufficient level of insulin in the blood,the uptake of glucose by the cells is inhibited.

How many molecules of NADH are formed by the oxidation of a 6-carbon fatty acid?

Chylomicrons are aggregates of triglycerides,phosphoglycerides,and cholesterol complexed with proteins.

Which of these is a direct fuel for the urea cycle?

The following reaction would occur during fat mobilization.

Which of the following is NOT considered a source of amino acids in humans?

Identify the beta carbon in the following diagram.

Two of the ketone bodies are _____ .

The biosynthesis of amino acids takes place mostly in the liver.

In the fatty acid synthetase system,acetyl CoA is converted back into a fatty acid.How many acetyl CoAs are used in making a 18 carbon fatty acid?

Ketogenic amino acids cannot be converted into _____ .

A chylomicron is a type of lipoprotein,produced from using fat in digested food.

While the brain cannot use fatty acids as an energy source due to the blood-brain barrier,red blood cell cannot use fatty acids because they lack mitochondria.

Amino acids of the amino acid pool can be supplied by

Which of the following statements is correct with reference to cholesterol?

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