Question 1

The complete metabolism of one molecule of myristic acid,a fatty acid with 14 atoms of carbon,would require ________ turns of the beta-oxidation cycle.

Accepted Answer

A) 6 
B) 7 
C) 12 
D) 14 
E) 16 
A) 6 
B) 7 
C) 12 
D) 14 
E) 16 A

Question 2

Which of the following is considered to be the so-called "good cholesterol"?

Accepted Answer

A) HDL 
B) LDL 
C) VLDL 
D) Chylomicrons 
A) HDL 
B) LDL 
C) VLDL 
D) Chylomicrons A

Question 3

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would require ________ turns of the beta-oxidation cycle.

Accepted Answer

A) 8 
B) 9 
C) 10 
D) 16 
E) 18 
A) 8 
B) 9 
C) 10 
D) 16 
E) 18 A

Question 4

Which molecule is not a ketone body?

Accepted Answer

A) acetoacetate 
B) acetone 
C) 3-hydroxybutyrate 
D) methyl ethyl ketone 
E) They are all ketone bodies. 
A) acetoacetate 
B) acetone 
C) 3-hydroxybutyrate 
D) methyl ethyl ketone 
E) They are all ketone bodies.

Question 5

Enzymes that hydrolyze lipids are ________; substances that emulsify lipids are ________.

Accepted Answer

A) insulin derivatives; lecithins 
B) pancreatic lipases; bile salts 
C) lipoproteins; lipases 
D) proteases; chylomicrons 
E) none of the above 
A) insulin derivatives; lecithins 
B) pancreatic lipases; bile salts 
C) lipoproteins; lipases 
D) proteases; chylomicrons 
E) none of the above

Question 6

Triacylglycerols are stored in

Accepted Answer

A) liposomes. 
B) adipocytes. 
C) high-density lipoproteins. 
D) low-density lipoproteins. 
E) membranes. 
A) liposomes. 
B) adipocytes. 
C) high-density lipoproteins. 
D) low-density lipoproteins. 
E) membranes.

Question 7

Which molecule is associated with transport of fatty acids into the mitochondrial matrix?

Accepted Answer

A) glycerol 3-phosphate 
B) NADH 
C) coenzyme A 
D) carnitine 
E) fatty acids 
A) glycerol 3-phosphate 
B) NADH 
C) coenzyme A 
D) carnitine 
E) fatty acids

Question 8

Compare the processes of β-oxidation of fatty acids and lipogenesis of fatty acids.

Accepted Answer

@#IMG-DLM& Note also that diff

Question 9

Each oxidation during fatty acid catabolism directly produces one molecule of ________ and a fatty acid molecule that has been shortened by ________ carbon atom(s).

Accepted Answer

A) ATP; two 
B) acetyl-SCoA; two 
C) ATP; one 
D) acetyl-SCoA; one 
E) CO2; three 
A) ATP; two 
B) acetyl-SCoA; two 
C) ATP; one 
D) acetyl-SCoA; one 
E) CO2; three

Question 10

The complete metabolism of one molecule of myristic acid,a fatty acid with 14 atoms of carbon,would produce ________ molecules of acetyl-SCoA.

Accepted Answer

A) 6 
B) 7 
C) 8 
D) 12 
E) 14 
A) 6 
B) 7 
C) 8 
D) 12 
E) 14

Question 11

The activation of a fatty acid prior to entering into the beta-oxidation cycle requires the presence of what coenzyme?

Accepted Answer

A) malonyl CoA 
B) FAD 
C) ATP 
D) cyclic AMP 
A) malonyl CoA 
B) FAD 
C) ATP 
D) cyclic AMP

Question 12

After digestion and absorption,the molecules from dietary fats and oils are transported in the bloodstream as

Accepted Answer

A) glycerol. 
B) fatty acids. 
C) cholesterol. 
D) citric acid. 
E) enzymes. 
A) glycerol. 
B) fatty acids. 
C) cholesterol. 
D) citric acid. 
E) enzymes.

Question 13

Which molecule is not associated with synthesis of triacylglycerides?

Accepted Answer

A) glycerol 3-phosphate 
B) NADH 
C) coenzyme A 
D) carnitine 
E) fatty acids 
A) glycerol 3-phosphate 
B) NADH 
C) coenzyme A 
D) carnitine 
E) fatty acids

Question 14

How many molecules of NADH are produced by the oxidation of a 10-carbon fatty acid?

Accepted Answer

A) 6 
B) 10 
C) 4 
D) 3 
E) 15 
A) 6 
B) 10 
C) 4 
D) 3 
E) 15

Question 15

Match the following.
-lipogenesis

Accepted Answer

A) results from increased concentrations of ketone bodies in the blood 
B) the catabolic reaction in which fatty acids are broken down two carbons at a time 
C) the anabolic process of synthesizing fatty acids 
D) presence of ketone bodies in the urine 
A) results from increased concentrations of ketone bodies in the blood 
B) the catabolic reaction in which fatty acids are broken down two carbons at a time 
C) the anabolic process of synthesizing fatty acids 
D) presence of ketone bodies in the urine

Question 16

The correct order for these three processes leading from a fatty acid molecule in a cell needing energy to high energy molecules capable of meeting the energy need is
I.activation by reaction with coenzyme A
II.oxidation to acetyl-SCoA and reduced coenzymes
III.transport from cytosol into mitochondrial matrix

Accepted Answer

A) I,II,III. 
B) II,III,I. 
C) III,I,II. 
D) I,III,II. 
E) III,II,I. 
A) I,II,III. 
B) II,III,I. 
C) III,I,II. 
D) I,III,II. 
E) III,II,I.

Question 17

The molecule that is a precursor to the other ketone bodies is

Accepted Answer

A) acetone. 
B) acetoacetate. 
C) 3-hydroxybutyrate. 
D) malonyl-ACP. 
E) malonyl-SCoA. 
A) acetone. 
B) acetoacetate. 
C) 3-hydroxybutyrate. 
D) malonyl-ACP. 
E) malonyl-SCoA.

Question 18

When fatty acid metabolism creates more acetyl-CoA than can be handled in the citric acid cycle,the excess acetyl-CoA is converted into ________.

Accepted Answer

A) ketone bodies 
B) amino acids 
C) cholesterol 
D) fatty alcohols 
E) glycerol 
A) ketone bodies 
B) amino acids 
C) cholesterol 
D) fatty alcohols 
E) glycerol

Question 19

Which factor is the same in both lipogenesis and β-oxidation of fatty acids?

Accepted Answer

A) They occur in the same location in the cell. 
B) They use the same enzymes. 
C) They both involve NADPH and FAD. 
D) They both depend on coenzyme A 
E) They both occur two carbon atoms at a time. 
A) They occur in the same location in the cell. 
B) They use the same enzymes. 
C) They both involve NADPH and FAD. 
D) They both depend on coenzyme A 
E) They both occur two carbon atoms at a time.

Question 20

Which statements are true for the process of lipogenesis?
I.It occurs in the mitochondria.
II.Acyl carrier proteins are involved.
III.NADPH is the coenzyme.
IV.The molecule increases in length by two carbons.
V.Energy is released in the process.

Accepted Answer

A) I,III,V 
B) II,IV 
C) I,III 
D) I,II,III,IV,V 
E) II,III,IV 
A) I,III,V 
B) II,IV 
C) I,III 
D) I,II,III,IV,V 
E) II,III,IV

Exam 24: Lipid Metabolism

The complete metabolism of one molecule of myristic acid,a fatty acid with 14 atoms of carbon,would require ________ turns of the beta-oxidation cycle.

Which of the following is considered to be the so-called "good cholesterol"?

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would require ________ turns of the beta-oxidation cycle.

Which molecule is not a ketone body?

Enzymes that hydrolyze lipids are ________; substances that emulsify lipids are ________.

Triacylglycerols are stored in

Which molecule is associated with transport of fatty acids into the mitochondrial matrix?

Compare the processes of β-oxidation of fatty acids and lipogenesis of fatty acids.

Each oxidation during fatty acid catabolism directly produces one molecule of ________ and a fatty acid molecule that has been shortened by ________ carbon atom(s).

The complete metabolism of one molecule of myristic acid,a fatty acid with 14 atoms of carbon,would produce ________ molecules of acetyl-SCoA.

The activation of a fatty acid prior to entering into the beta-oxidation cycle requires the presence of what coenzyme?

After digestion and absorption,the molecules from dietary fats and oils are transported in the bloodstream as

Which molecule is not associated with synthesis of triacylglycerides?

How many molecules of NADH are produced by the oxidation of a 10-carbon fatty acid?

Match the following. -lipogenesis

The molecule that is a precursor to the other ketone bodies is

When fatty acid metabolism creates more acetyl-CoA than can be handled in the citric acid cycle,the excess acetyl-CoA is converted into ________.

Which factor is the same in both lipogenesis and β-oxidation of fatty acids?

Which statements are true for the process of lipogenesis? I.It occurs in the mitochondria. II.Acyl carrier proteins are involved. III.NADPH is the coenzyme. IV.The molecule increases in length by two carbons. V.Energy is released in the process.

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

Enzymes that hydrolyze lipids are ; substances that emulsify lipids are .

Each oxidation during fatty acid catabolism directly produces one molecule of and a fatty acid molecule that has been shortened by carbon atom(s).