Question 1

The major carrier(s) of dietary fat from the intestine is/are:

Accepted Answer

A)  VLDL. 
B)  chylomicrons. 
C)  HDL. 
D)  LDL. 
E)  IDL. 
A)  VLDL. 
B)  chylomicrons. 
C)  HDL. 
D)  LDL. 
E)  IDL. B

Question 2

___________________ is a nine-carbon sugar that is a component of the gangliosides.

Accepted Answer

Sialic acid or N-acetylneuraminic acid

Question 3

The first step in vitamin D synthesis is unusual. What is it?

Accepted Answer

The precursor to vitamin D is 7-dehydrocholesterol. It is photolyzed in the skin by UV light to the vitamin D3, also known as cholecalciferol, which is converted via a series of steps to vitamin D.

Question 4

Which of the following is the common precursor for both the phosphatidyl inositols and triacylglycerols?

Accepted Answer

A)  diacylglycerol 
B)  inosinic acid 
C)  phosphatidate 
D)  CDP-diacylglycerol 
E)  None of the above. 
A)  diacylglycerol 
B)  inosinic acid 
C)  phosphatidate 
D)  CDP-diacylglycerol 
E)  None of the above.

Question 5

What is phosphatidyl choline? How is it synthesized in mammals?

Accepted Answer

Phosphatidyl choline is one of the most

Question 6

___________________ is the major carrier of cholesterol esters in the blood.

Accepted Answer

Low-densit

Question 7

In mammalian cells, phosphatidate is synthesized in the outer mitrochondrial membrane and the ___________________.

Accepted Answer

endoplasmi

Question 8

In mammals, the _______________ is the major site of triacylglycerol synthesis.

Accepted Answer

A) liver 
B) receptor-mediated endocytosis 
C) phosphatidyl ethanolamine 
D) muscle 
E) lipoprotein particles
F)dihydroxyacetone phosphate
G)vitamin D
H)pregnenolone
I)glycocholate
J)acetyl CoA
K)vitamin A
L)sphingomyelin 
A) liver 
B) receptor-mediated endocytosis 
C) phosphatidyl ethanolamine 
D) muscle 
E) lipoprotein particles
F)dihydroxyacetone phosphate
G)vitamin D
H)pregnenolone
I)glycocholate
J)acetyl CoA
K)vitamin A
L)sphingomyelin

Question 9

What are some of the medical strategies to control cholesterol levels at an appropriate level?

Accepted Answer

High blood levels of cholesterol are the

Question 10

The synthesis of ___________________ is the committed step in cholesterol biosynthesis.

Accepted Answer

The answer of The synthesis of ___________________ is the committed...

Question 11

List the types of lipoprotein particles and give the primary physiological role of the lipoprotein.

Accepted Answer

See Table 29.1.
Lipoprotein Physiologica

Question 12

The role of lipoprotein particles is to:

Accepted Answer

A)  solubilize hydrophobic lipids. 
B)  aid in clot formation. 
C)  contain cell-targeting signals. 
D)  A and B. 
E)  A and C. 
A)  solubilize hydrophobic lipids. 
B)  aid in clot formation. 
C)  contain cell-targeting signals. 
D)  A and B. 
E)  A and C.

Question 13

The LDL receptors on the plasma membrane are localized in coated pits that contain the receptors of which of the following proteins?

Accepted Answer

A)  clathrin 
B)  lipoprotein A 
C)  adrenodoxin 
D)  HMG-CoA reductase 
E)  sterol regulatory element binding protein (SREBP) 
A)  clathrin 
B)  lipoprotein A 
C)  adrenodoxin 
D)  HMG-CoA reductase 
E)  sterol regulatory element binding protein (SREBP)

Question 14

What is the role of phosphatidyl choline in the synthesis of sphingomyelin?

Accepted Answer

Phosphatidyl choline supplies

Question 15

How are gangliosides synthesized?

Accepted Answer

Gangliosides have oligosaccharides attac

Question 16

What are the three stages of cholesterol synthesis?

Accepted Answer

The stages are: (1) the synthe

Question 17

Why is phosphatidyl serine considered a class of molecules, and not one type?

Accepted Answer

Because varying fatty acids gr

Question 18

_______________ is a component of the myelin sheath.

Accepted Answer

A) liver 
B) receptor-mediated endocytosis 
C) phosphatidyl ethanolamine 
D) muscle 
E) lipoprotein particles
F)dihydroxyacetone phosphate
G)vitamin D
H)pregnenolone
I)glycocholate
J)acetyl CoA
K)vitamin A
L)sphingomyelin 
A) liver 
B) receptor-mediated endocytosis 
C) phosphatidyl ethanolamine 
D) muscle 
E) lipoprotein particles
F)dihydroxyacetone phosphate
G)vitamin D
H)pregnenolone
I)glycocholate
J)acetyl CoA
K)vitamin A
L)sphingomyelin

Question 19

Feedback regulation of cholesterol synthesis is mainly controlled at the step catalyzed by the enzyme:

Accepted Answer

A)  3-hydroxy-3-methylglutaryl (HMG) CoA reductase. 
B)  geranyl transferase. 
C)  HMG transferase. 
D)  farnesyl reductase. 
E)  None of the above. 
A)  3-hydroxy-3-methylglutaryl (HMG) CoA reductase. 
B)  geranyl transferase. 
C)  HMG transferase. 
D)  farnesyl reductase. 
E)  None of the above.

Question 20

Tay Sachs disease is caused by an inability to degrade:

Accepted Answer

A)  sphingosine. 
B)  gangliosides. 
C)  dipalmitoyl phosphatidyl choline. 
D)  ceramide. 
E)  None of the above. 
A)  sphingosine. 
B)  gangliosides. 
C)  dipalmitoyl phosphatidyl choline. 
D)  ceramide. 
E)  None of the above.

Exam 29: Lipid Synthesis

The major carrier(s) of dietary fat from the intestine is/are:

___________________ is a nine-carbon sugar that is a component of the gangliosides.

The first step in vitamin D synthesis is unusual. What is it?

Which of the following is the common precursor for both the phosphatidyl inositols and triacylglycerols?

What is phosphatidyl choline? How is it synthesized in mammals?

___________________ is the major carrier of cholesterol esters in the blood.

In mammalian cells, phosphatidate is synthesized in the outer mitrochondrial membrane and the ___________________.

In mammals, the _______________ is the major site of triacylglycerol synthesis.

What are some of the medical strategies to control cholesterol levels at an appropriate level?

The synthesis of ___________________ is the committed step in cholesterol biosynthesis.

List the types of lipoprotein particles and give the primary physiological role of the lipoprotein.

The role of lipoprotein particles is to:

The LDL receptors on the plasma membrane are localized in coated pits that contain the receptors of which of the following proteins?

What is the role of phosphatidyl choline in the synthesis of sphingomyelin?

How are gangliosides synthesized?

What are the three stages of cholesterol synthesis?

Why is phosphatidyl serine considered a class of molecules, and not one type?

_______________ is a component of the myelin sheath.

Feedback regulation of cholesterol synthesis is mainly controlled at the step catalyzed by the enzyme:

Tay Sachs disease is caused by an inability to degrade:

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant Dna Techniques

Filters