Question 1

The following fatty acid __________ be metabolized by _.

Accepted Answer

A)   will; being run through the  β\betaβ -oxidation pathway until the double bond is isomerized for the pathway to continue
B)   will not; not being recognized by  β\betaβ -oxidation pathway enzymes
C)   will not; entering the pathway as normal but eventually inhibiting the enzymes
D)   will; being run through the  β\betaβ -oxidation pathway as normal E) None of the above
F) B) and C)

Question 2

How many more enzymes does the oxidation of oleoyl-CoA (18:1)  require than the oxidation of stearoyl-CoA (18:0) ?

Accepted Answer

A)   0
B)   1
C)   2
D)   3E) None of the above
F) A) and D)

Question 3

In order for a fatty acyl-CoA to be moved into the mitochondria for  β\betaβ -oxidation, it must be

Accepted Answer

A)   transported by the carnitine-acylcarnitine translocase.
B)   activated by ATP.
C)   reduced by NADH and FADH2.
D)   hydrolyzed into acetyl-coA fragments. E) A) and B)
F) B) and C)

Question 4

Which one of the following lipoproteins functions to transport cholesterol from the peripheral tissues to the liver?

Accepted Answer

A)   VLDL
B)   LDL
C)   HDL
D)   chylomicronE) A) and B)
F) All of the above

Question 5

What enzyme is activated by HDL to release cholesterol from the cell membranes of peripheral tissues?

Accepted Answer

A)   phosphatidylcholine esterase
B)   HDL apolipase
C)   cholesterol esterase
D)   lecithin-cholesterol acyltransferaseE) B) and C)
F) A) and D)

Question 6

For every two carbons that are added to a growing fatty acid chain in the fatty acid synthesis pathway, __________ ATPs and __________ NADPHs are required.

Accepted Answer

A)   0; 1
B)   1; 2
C)   2; 1
D)   0; 2E) A) and B)
F) C) and D)

Question 7

Diagram the process by which the palmitoyl-CoA molecule moves from the cytosol into the mitochondria for degradation.

Accepted Answer

The answer of Diagram the process by which the palmitoyl-CoA...

Question 8

What enzyme class catalyzes the following reaction?

Accepted Answer

A)   ligase
B)   hydratase
C)   transferase
D)   oxidoreductaseE) A) and C)
F) C) and D)

Question 9

The acetyl-CoA for fatty acid synthesis comes from the

Accepted Answer

A)   breakdown of fats.
B)   TCA cycle.
C)   mitochondria via the citrate shuttle.
D)   breakdown of cytoplasmic pyruvate.E) A) and D)
F) None of the above C

Question 10

All of the following are metabolic fates of cholesterol EXCEPT

Accepted Answer

A)   the majority of cholesterol is catabolized to bile salts.
B)   cholesterol may be present in membranes.
C)   cholesterol is a precursor for nucleotides.
D)   steroids are derived from cholesterol.E) A) and D)
F) B) and C)

Question 11

The smallest precursor molecule cholesterol is derived from

Accepted Answer

A)   squalene.
B)   isoprene.
C)   arachidonic acid.
D)   acetyl-CoA.E) A) and D)
F) None of the above

Question 12

All of the following genes are activated by the interaction of the SREBP with the SRE, EXCEPT for

Accepted Answer

A)   HMG-CoA reductase.
B)   LDL receptor.
C)   HMG-CoA synthase.
D)   cholesterol esterase.E) A) and D)
F) B) and C) D

Question 13

What cofactor, common to carboxylase enzymes, is used by acetyl-CoA carboxylase?

Accepted Answer

A)   NADPH
B)   FAD
C)   biotin
D)   pyridoxal phosphateE) C) and D)
F) A) and D)

Question 14

Describe the metabolic conditions under which ketone bodies are produced.

Accepted Answer

When carbohydrate levels run low, typica...

Question 15

Identify the molecular components of the following lipoprotein.

Accepted Answer

(A) Cholesterol, (B) triacylgl...

Question 16

During the conversion of VLDL to IDL, the

Accepted Answer

A)   IDL becomes increasingly enriched in cholesterol.
B)   core of IDL becomes increasingly enriched in TAGs.
C)   LDL intermediate is formed.
D)   IDL becomes depleted in protein.E) None of the above
F) C) and D)

Question 17

Which is true of the acyl carrier protein (ACP) ?

Accepted Answer

A)   It transports the fatty acid chain during oxidation and synthesis.
B)   It directs the growing fatty acid chain from one enzyme active site to another in the fatty acid synthesis pathway.
C)   It requires ATP for proper function.
D)   It catalyzes the delivery of fatty acyl chains from the mitochondria to the cytosol.E) C) and D)
F) A) and D)

Question 18

What is the name of the enzyme that adds another carbon atom to propionyl-CoA in the degradation of odd-chain fatty acids?

Accepted Answer

Propionyl-CoA carboxylase

Question 19

Cholesterol biosynthesis and cholesterol uptake is stimulated by

Accepted Answer

A)   the binding of SREs to cholesterol uptake genes.
B)   the binding of SREBPs to SREs and activating the transcription of cholesterol synthesizing genes.
C)   increased levels of cholesterol binding to the SREBPs.
D)   the uptake of LDLs through the LDL receptor.E) A) and B)
F) None of the above

Question 20

How many more passes through  β\betaβ -oxidation does the saturated fat stearic acid (18:0)  require, compared with the monounsaturated fat oleic acid (18:1) ?

Accepted Answer

A)   0
B)   1
C)   2
D)   17 E) A) and D)
F) A) and C)

Exam 16: Lipid Metabolism

Correct Answer
verified

How many more enzymes does the oxidation of oleoyl-CoA (18:1) require than the oxidation of stearoyl-CoA (18:0) ?

Correct Answer
verified

In order for a fatty acyl-CoA to be moved into the mitochondria for $\beta$ -oxidation, it must be

Correct Answer
verified

Which one of the following lipoproteins functions to transport cholesterol from the peripheral tissues to the liver?

Correct Answer
verified

What enzyme is activated by HDL to release cholesterol from the cell membranes of peripheral tissues?

Correct Answer
verified

For every two carbons that are added to a growing fatty acid chain in the fatty acid synthesis pathway, ATPs and NADPHs are required.

Correct Answer
verified

Diagram the process by which the palmitoyl-CoA molecule moves from the cytosol into the mitochondria for degradation.

Correct Answer
verified

What enzyme class catalyzes the following reaction?

Correct Answer
verified

The acetyl-CoA for fatty acid synthesis comes from the

Correct Answer
verified
C

All of the following are metabolic fates of cholesterol EXCEPT

Correct Answer
verified

The smallest precursor molecule cholesterol is derived from

Correct Answer
verified

All of the following genes are activated by the interaction of the SREBP with the SRE, EXCEPT for

Correct Answer
verified
D

What cofactor, common to carboxylase enzymes, is used by acetyl-CoA carboxylase?

Correct Answer
verified

Describe the metabolic conditions under which ketone bodies are produced.

Correct Answer
verified
When carbohydrate levels run low, typica...
View Answer

Identify the molecular components of the following lipoprotein.

Correct Answer
verified
(A) Cholesterol, (B) triacylgl...
View Answer

During the conversion of VLDL to IDL, the

Correct Answer
verified

Which is true of the acyl carrier protein (ACP) ?

Correct Answer
verified

What is the name of the enzyme that adds another carbon atom to propionyl-CoA in the degradation of odd-chain fatty acids?

Correct Answer
verified
Propionyl-CoA carboxylase

Cholesterol biosynthesis and cholesterol uptake is stimulated by

Correct Answer
verified

How many more passes through $\beta$ -oxidation does the saturated fat stearic acid (18:0) require, compared with the monounsaturated fat oleic acid (18:1) ?

Correct Answer
verified

Exam 16: Lipid Metabolism

The following fatty acid __________ be metabolized by _.

Correct AnswerverifiedShow Answer

How many more enzymes does the oxidation of oleoyl-CoA (18:1) require than the oxidation of stearoyl-CoA (18:0) ?

Correct AnswerverifiedShow Answer

In order for a fatty acyl-CoA to be moved into the mitochondria for β\betaβ -oxidation, it must be

Correct AnswerverifiedShow Answer

Which one of the following lipoproteins functions to transport cholesterol from the peripheral tissues to the liver?

Correct AnswerverifiedShow Answer

What enzyme is activated by HDL to release cholesterol from the cell membranes of peripheral tissues?

Correct AnswerverifiedShow Answer

For every two carbons that are added to a growing fatty acid chain in the fatty acid synthesis pathway, __________ ATPs and __________ NADPHs are required.

Correct AnswerverifiedShow Answer

Diagram the process by which the palmitoyl-CoA molecule moves from the cytosol into the mitochondria for degradation.

Correct AnswerverifiedShow Answer

What enzyme class catalyzes the following reaction?

Correct AnswerverifiedShow Answer

The acetyl-CoA for fatty acid synthesis comes from the

Correct AnswerverifiedC

All of the following are metabolic fates of cholesterol EXCEPT

Correct AnswerverifiedShow Answer

The smallest precursor molecule cholesterol is derived from

Correct AnswerverifiedShow Answer

All of the following genes are activated by the interaction of the SREBP with the SRE, EXCEPT for

Correct AnswerverifiedD

What cofactor, common to carboxylase enzymes, is used by acetyl-CoA carboxylase?

Correct AnswerverifiedShow Answer

Describe the metabolic conditions under which ketone bodies are produced.

Correct AnswerverifiedWhen carbohydrate levels run low, typica...View AnswerShow Answer

Identify the molecular components of the following lipoprotein.

Correct Answerverified(A) Cholesterol, (B) triacylgl...View AnswerShow Answer

During the conversion of VLDL to IDL, the

Correct AnswerverifiedShow Answer

Which is true of the acyl carrier protein (ACP) ?

Correct AnswerverifiedShow Answer

What is the name of the enzyme that adds another carbon atom to propionyl-CoA in the degradation of odd-chain fatty acids?

Correct AnswerverifiedPropionyl-CoA carboxylase

Cholesterol biosynthesis and cholesterol uptake is stimulated by

Correct AnswerverifiedShow Answer

How many more passes through β\betaβ -oxidation does the saturated fat stearic acid (18:0) require, compared with the monounsaturated fat oleic acid (18:1) ?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

In order for a fatty acyl-CoA to be moved into the mitochondria for $\beta$ -oxidation, it must be

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For every two carbons that are added to a growing fatty acid chain in the fatty acid synthesis pathway, ATPs and NADPHs are required.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified
When carbohydrate levels run low, typica...
View Answer

Correct Answer
verified
(A) Cholesterol, (B) triacylgl...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Propionyl-CoA carboxylase

Correct Answer
verified

How many more passes through $\beta$ -oxidation does the saturated fat stearic acid (18:0) require, compared with the monounsaturated fat oleic acid (18:1) ?

Correct Answer
verified