Question 1

Fatty acid synthase binds growing fatty acids

Accepted Answer

A)  by an ester linkage to a side chain of serine. 
B)  by a thioester linkage to a side chain of cysteines. 
C)  as a Schiff base to a side chain of lysine. 
D)  by a thioester linkage to a phosphopantetheine linked to a serine. 
A)  by an ester linkage to a side chain of serine. 
B)  by a thioester linkage to a side chain of cysteines. 
C)  as a Schiff base to a side chain of lysine. 
D)  by a thioester linkage to a phosphopantetheine linked to a serine.

Question 2

Lipids yield more ATP than sugars because

Accepted Answer

A)  they have more carbon atoms than sugars. 
B)  their carbon atoms are more highly reduced. 
C)  both of these 
D)  neither of these 
A)  they have more carbon atoms than sugars. 
B)  their carbon atoms are more highly reduced. 
C)  both of these 
D)  neither of these

Question 3

Drugs are available to lower cholesterol which actually inhibit its synthesis in the body.

Accepted Answer

A) True 
 B)False

Question 4

Since acetyl-CoA carboxylase is key to the synthesis of fatty acids, inhibitors of this enzyme may be useful for weight loss or treatment of obesity.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is not a product of the activation of fatty acids?

Accepted Answer

A)  A thioester 
B)  ADP 
C)  Pyrophosphate 
D)  Phosphate 
E)  All of these are products of the activation of a fatty acid. 
A)  A thioester 
B)  ADP 
C)  Pyrophosphate 
D)  Phosphate 
E)  All of these are products of the activation of a fatty acid.

Question 6

Phospholipases are designated A, B, etc, based on

Accepted Answer

A)  the different sites in the molecule where they cleave the phospholipids. 
B)  whether they are phosphorylases or hydrolases. 
C)  whether they use NAD as a cofactor. 
D)  whether they use ATP as a cofactor. 
A)  the different sites in the molecule where they cleave the phospholipids. 
B)  whether they are phosphorylases or hydrolases. 
C)  whether they use NAD as a cofactor. 
D)  whether they use ATP as a cofactor.

Question 7

Which of the following is true about the oxidation steps in β-oxidation of fatty acids?

Accepted Answer

A)  NAD+ is the cosubstrate when the oxidation creates a double bond 
B)  FAD is the cosubstrate when the oxidation produces a carbonyl group 
C)  FAD is the cosubstrate when the oxidation creates a double bond 
D)  either NAD+ or FAD can be used to create a double bond 
E)  none of these 
A)  NAD+ is the cosubstrate when the oxidation creates a double bond 
B)  FAD is the cosubstrate when the oxidation produces a carbonyl group 
C)  FAD is the cosubstrate when the oxidation creates a double bond 
D)  either NAD+ or FAD can be used to create a double bond 
E)  none of these

Question 8

The enzyme activity catalyzing the reaction shown is best termed a

Accepted Answer

A)  reductase 
B)  hydratase 
C)  dehydratase 
D)  dehydrogenase 
A)  reductase 
B)  hydratase 
C)  dehydratase 
D)  dehydrogenase

Question 9

Obesity can lead to which of the following?

Accepted Answer

A)  diabetes 
B)  heart attack 
C)  stroke 
D)  some forms of cancer 
E)  all of these 
A)  diabetes 
B)  heart attack 
C)  stroke 
D)  some forms of cancer 
E)  all of these

Question 10

Which group of small molecules best fit the boxes associated with the reaction shown?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 11

The enzyme activity catalyzing the reaction shown is best termed a

Accepted Answer

A)  reductase 
B)  ketothiolase 
C)  transferase 
D)  dehydratase 
A)  reductase 
B)  ketothiolase 
C)  transferase 
D)  dehydratase

Question 12

The processing of one molecule of stearic acid (18 carbons) by β-oxidation

Accepted Answer

A)  requires 8 cycles of β-oxidation and produces 9 molecules of acetyl-CoA. 
B)  requires 8 cycles of β-oxidation and produces 8 molecules of acetyl-CoA. 
C)  requires 9 cycles of β-oxidation and produces 8 molecules of acetyl-CoA. 
D)  requires 9 cycles of β-oxidation and produces 9 molecules of acetyl-CoA. 
A)  requires 8 cycles of β-oxidation and produces 9 molecules of acetyl-CoA. 
B)  requires 8 cycles of β-oxidation and produces 8 molecules of acetyl-CoA. 
C)  requires 9 cycles of β-oxidation and produces 8 molecules of acetyl-CoA. 
D)  requires 9 cycles of β-oxidation and produces 9 molecules of acetyl-CoA.

Question 13

Where in the cell does β-oxidation occur?

Accepted Answer

A)  Cytoplasm. 
B)  Outer mitochondrial membrane. 
C)  Mitochondrial intermembrane space. 
D)  Inner mitochondrial membrane. 
E)  Mitochondrial matrix. 
A)  Cytoplasm. 
B)  Outer mitochondrial membrane. 
C)  Mitochondrial intermembrane space. 
D)  Inner mitochondrial membrane. 
E)  Mitochondrial matrix.

Question 14

The first three reactions of the β-oxidation cycle of fatty acids produce

Accepted Answer

A)  two moles of NADH 
B)  two moles of FADH2 
C)  one mole each of NADH and FADH2 
D)  two moles of ATP 
A)  two moles of NADH 
B)  two moles of FADH2 
C)  one mole each of NADH and FADH2 
D)  two moles of ATP

Question 15

The components of lipoproteins such as LDL and HDL which makes them water soluble are

Accepted Answer

A)  proteins. 
B)  phospholipids. 
C)  unesterified cholesterol. 
D)  proteins and phospholipids. 
E)  All of these 
A)  proteins. 
B)  phospholipids. 
C)  unesterified cholesterol. 
D)  proteins and phospholipids. 
E)  All of these

Fatty acid synthase binds growing fatty acids

Lipids yield more ATP than sugars because

Drugs are available to lower cholesterol which actually inhibit its synthesis in the body.

Since acetyl-CoA carboxylase is key to the synthesis of fatty acids, inhibitors of this enzyme may be useful for weight loss or treatment of obesity.

Which of the following is not a product of the activation of fatty acids?

Phospholipases are designated A, B, etc, based on

Which of the following is true about the oxidation steps in β-oxidation of fatty acids?

The enzyme activity catalyzing the reaction shown is best termed a

Obesity can lead to which of the following?

Which group of small molecules best fit the boxes associated with the reaction shown?

The enzyme activity catalyzing the reaction shown is best termed a

The processing of one molecule of stearic acid (18 carbons) by β-oxidation

Where in the cell does β-oxidation occur?

The first three reactions of the β-oxidation cycle of fatty acids produce

The components of lipoproteins such as LDL and HDL which makes them water soluble are

Biochemistry and the Organization of Cells

Water: the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three-Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins: Enzymes

The Behavior of Proteins: Enzymes, Mechanisms, and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids: How Structure Conveys Information

Biosynthesis of Nucleic Acids: Replication

Transcription of the Genetic Code: Biosynthesis of RNA

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism: Cellular Signaling

Filters

Exam 21: Lipid Metabolism

Fatty acid synthase binds growing fatty acids

Lipids yield more ATP than sugars because

Drugs are available to lower cholesterol which actually inhibit its synthesis in the body.

Since acetyl-CoA carboxylase is key to the synthesis of fatty acids, inhibitors of this enzyme may be useful for weight loss or treatment of obesity.

Which of the following is not a product of the activation of fatty acids?

Phospholipases are designated A, B, etc, based on

Which of the following is true about the oxidation steps in β-oxidation of fatty acids?

The enzyme activity catalyzing the reaction shown is best termed a

Obesity can lead to which of the following?

Which group of small molecules best fit the boxes associated with the reaction shown?

The enzyme activity catalyzing the reaction shown is best termed a

The processing of one molecule of stearic acid (18 carbons) by β-oxidation

Where in the cell does β-oxidation occur?

The first three reactions of the β-oxidation cycle of fatty acids produce

The components of lipoproteins such as LDL and HDL which makes them water soluble are

Biochemistry and the Organization of Cells

Water: the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three-Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins: Enzymes

The Behavior of Proteins: Enzymes, Mechanisms, and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids: How Structure Conveys Information

Biosynthesis of Nucleic Acids: Replication

Transcription of the Genetic Code: Biosynthesis of RNA

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism: Cellular Signaling

Filters