Question 1

The activation of acetyl-CoA for fatty acid synthesis is achieved by converting the acetyl-CoA into _____.

Accepted Answer

A)  propionyl-CoA 
B)  malonyl-CoA 
C)  acetoacetyl-CoA 
D)  HMG-CoA 
E)  $\beta$-hydroxybutyryl-CoA 
A)  propionyl-CoA 
B)  malonyl-CoA 
C)  acetoacetyl-CoA 
D)  HMG-CoA 
E)  $\beta$-hydroxybutyryl-CoA

Question 2

What class of lipid is squalene, the precursor to cholesterol?

Accepted Answer

A)  isoprenoid 
B)  fatty acid 
C)  steroid 
D)  wax 
E)  triacylglycerol 
A)  isoprenoid 
B)  fatty acid 
C)  steroid 
D)  wax 
E)  triacylglycerol

Question 3

During$\beta$-oxidation of an odd-chain fatty acid, the last three carbon atoms from the oxidized fatty acid enter the citric acid cycle as _____.

Accepted Answer

A)  propionyl-CoA 
B)  methylmalonyl-CoA 
C)  succinyl-CoA 
D)  succinate 
E)  fumarate 
A)  propionyl-CoA 
B)  methylmalonyl-CoA 
C)  succinyl-CoA 
D)  succinate 
E)  fumarate

Question 4

Each round of $\beta$-oxidation of a saturated fatty acyl-CoA produces _____.

Accepted Answer

A)  1 NADH, 1 FADH2, 1 CO2, 1 acetyl-CoA 
B)  1 NADH, 1 FADH2, 1 acetyl-CoA 
C)  1 NADH, 1 FADH2, 2 acetyl-CoA 
D)  1 NADH, 1 FADH2, 1 H2O, 1 acetyl-CoA 
E)  2 NADH, 1 FADH2, 1 acetyl-CoA 
A)  1 NADH, 1 FADH2, 1 CO2, 1 acetyl-CoA 
B)  1 NADH, 1 FADH2, 1 acetyl-CoA 
C)  1 NADH, 1 FADH2, 2 acetyl-CoA 
D)  1 NADH, 1 FADH2, 1 H2O, 1 acetyl-CoA 
E)  2 NADH, 1 FADH2, 1 acetyl-CoA

Question 5

Cholesterol is converted into _____, a molecule that aids in the absorption of dietary lipids.

Accepted Answer

A)  aldosterone 
B)  cortisol 
C)  $\beta$-estradiol 
D)  progesterone 
E)  cholates 
A)  aldosterone 
B)  cortisol 
C)  $\beta$-estradiol 
D)  progesterone 
E)  cholates

Question 6

Which of the following structures correctly represents a glycerophospholipid?

Accepted Answer

A)  structure A 
B)  structure B 
C)  structure C 
D)  structure D 
E)  none of the above 
A)  structure A 
B)  structure B 
C)  structure C 
D)  structure D 
E)  none of the above

Question 7

Members of the _____ family have four fused, nonplanar rings and a C3-OH group.

Accepted Answer

The answer of Members of the _____ family have four...

Question 8

Identify the compound below.

Accepted Answer

A)  glycerophospholipid 
B)  sphingosine 
C)  ceramide 
D)  spingomylelin 
E)  ganglioside 
A)  glycerophospholipid 
B)  sphingosine 
C)  ceramide 
D)  spingomylelin 
E)  ganglioside

Question 9

With respect to polarity, membrane lipids can be described as ______.

Accepted Answer

The answer of With respect to polarity, membrane lipids can...

Question 10

What coenzyme is required for the complete $\alpha$-oxidation of a polyunsaturated fatty acid?

Accepted Answer

A)  NADPH 
B)  NADP+ 
C)  NADH 
D)  FADH2 
E)  all of the above 
A)  NADPH 
B)  NADP+ 
C)  NADH 
D)  FADH2 
E)  all of the above

Question 11

Which of the following is the active donor of carbon units in fatty acid biosynthesis?

Accepted Answer

A)  acetyl CoA 
B)  malonyl CoA 
C)  palmitic acid 
D)  propionyl CoA 
E)  ceramides 
A)  acetyl CoA 
B)  malonyl CoA 
C)  palmitic acid 
D)  propionyl CoA 
E)  ceramides

Question 12

The most notable difference between _____ and other lipids is the presence of four fused rings.

Accepted Answer

A)  cholesterol 
B)  arachidonic acid 
C)  ganglioside 
D)  plasmalogen 
E)  triacylglycerol 
A)  cholesterol 
B)  arachidonic acid 
C)  ganglioside 
D)  plasmalogen 
E)  triacylglycerol

Question 13

The $\beta$-oxidation of odd-numbered fatty acids results in _____ as a final product.

Accepted Answer

The answer of The $\beta$-oxidation of odd-numbered fatty acids results...

Question 14

Which enzyme is the rate-determining step for fatty acid synthesis?

Accepted Answer

A)  ATP-citrate lyase 
B)  trans acylase 
C)  3-ketoacyl-ACP reductase 
D)  3-hydroxyacyl-ACP dehydrase 
E)  acetyl-CoA carboxylase 
A)  ATP-citrate lyase 
B)  trans acylase 
C)  3-ketoacyl-ACP reductase 
D)  3-hydroxyacyl-ACP dehydrase 
E)  acetyl-CoA carboxylase

Question 15

Eicosanoids are 20-carbon compounds derived from _____.

Accepted Answer

arachidonic acid or

Question 16

A type of lipid that commonly forms a waterproof barrier and is composed of a fatty acid and a fatty alcohol is called a _____.

Accepted Answer

A)  terpenoid 
B)  ganglioside 
C)  capsaicin 
D)  steroid 
E)  wax 
A)  terpenoid 
B)  ganglioside 
C)  capsaicin 
D)  steroid 
E)  wax

Question 17

What is the product of fatty acid activation?

Accepted Answer

A)  acyl adenylate 
B)  pyrophosphate 
C)  acyl-CoA 
D)  acyl ester 
E)  acyl-carnitine 
A)  acyl adenylate 
B)  pyrophosphate 
C)  acyl-CoA 
D)  acyl ester 
E)  acyl-carnitine

Exam 9: Lipids I

The activation of acetyl-CoA for fatty acid synthesis is achieved by converting the acetyl-CoA into _____.

What class of lipid is squalene, the precursor to cholesterol?

During β\betaβ -oxidation of an odd-chain fatty acid, the last three carbon atoms from the oxidized fatty acid enter the citric acid cycle as _____.

Each round of β\betaβ -oxidation of a saturated fatty acyl-CoA produces _____.

Cholesterol is converted into _____, a molecule that aids in the absorption of dietary lipids.

Which of the following structures correctly represents a glycerophospholipid?

Members of the _____ family have four fused, nonplanar rings and a C3-OH group.

Identify the compound below.

With respect to polarity, membrane lipids can be described as ______.

What coenzyme is required for the complete α\alphaα -oxidation of a polyunsaturated fatty acid?

Which of the following is the active donor of carbon units in fatty acid biosynthesis?

The most notable difference between _____ and other lipids is the presence of four fused rings.

The β\betaβ -oxidation of odd-numbered fatty acids results in _____ as a final product.

Which enzyme is the rate-determining step for fatty acid synthesis?

Eicosanoids are 20-carbon compounds derived from _____.

A type of lipid that commonly forms a waterproof barrier and is composed of a fatty acid and a fatty alcohol is called a _____.

What is the product of fatty acid activation?

The Chemical Foundations of Biochemistry

Nucleic Acids

Proteins I

Proteins Iienzymes

Membranes and an Introduction to Signal Transduction

Carbohydrates I

The Common Catabolic Pathway

Carbohydrates II

Lipids II

Amine Metabolism

Metabolism Integration

Nucleotide Deoxynucleotide Metabolism

Dna Replication, Damage and Repair

Rna Synthesis

Protein

Control of Gene

Determination of Macromolecular Structure

Allosterism and Receptor-Ligand

Designer Proteins and Protein Folding

Biomolecule Purification

Bioinformatics and Omics

Signal

Protein Trafficking

Photosynthesis Nitrogen

Filters

During $\beta$ -oxidation of an odd-chain fatty acid, the last three carbon atoms from the oxidized fatty acid enter the citric acid cycle as _____.

Each round of $\beta$ -oxidation of a saturated fatty acyl-CoA produces _____.

What coenzyme is required for the complete $\alpha$ -oxidation of a polyunsaturated fatty acid?

The $\beta$ -oxidation of odd-numbered fatty acids results in _____ as a final product.