Question 1

Glycerol produced as a byproduct of metabolism of lipids is converted to ________,which can be isomerized to a compound that can enter glycolysis or gluconeogenesis.

Accepted Answer

A) fatty acids 
B) citrate 
C) dihydroxyacetone phosphate 
D) acetone 
E) carbon dioxide 
A) fatty acids 
B) citrate 
C) dihydroxyacetone phosphate 
D) acetone 
E) carbon dioxide

Question 2

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 3

Fatty acids are activated for breakdown by conversion to

Accepted Answer

A) fatty acid CoA's. 
B) triacylglycerides. 
C) fatty acid glycerol phosphates. 
D) fatty acid alkyl esters. 
E) none of the above 
A) fatty acid CoA's. 
B) triacylglycerides. 
C) fatty acid glycerol phosphates. 
D) fatty acid alkyl esters. 
E) none of the above

Question 4

Fatty acids from triacylglycerols can be ________ when energy is plentiful or ________ when energy is needed.

Accepted Answer

A) oxidized to produce acetyl-CoA;stored as triacylglycerols in adipose tissue 
B) stored as triacylglycerols in adipose tissue;oxidized to produce acetyl-CoA 
C) stored as cholesterol derivatives in adipose tissue;oxidized to produce glucose 
D) reduced to hydrocarbons;isomerized to lower energy forms 
E) diverted to gluconeogenesis;hydrolyzed to smaller molecules 
A) oxidized to produce acetyl-CoA;stored as triacylglycerols in adipose tissue 
B) stored as triacylglycerols in adipose tissue;oxidized to produce acetyl-CoA 
C) stored as cholesterol derivatives in adipose tissue;oxidized to produce glucose 
D) reduced to hydrocarbons;isomerized to lower energy forms 
E) diverted to gluconeogenesis;hydrolyzed to smaller molecules

Question 5

When energy from stored triacylglycerols is needed,they are ________,and then transported in the bloodstream via ________ as fatty acids.

Accepted Answer

A) hydrolyzed;high-density lipoproteins 
B) hydrolyzed;albumins 
C) oxidized;chylomicrons 
D) oxidized;albumins 
E) polymerized;high-density lipoproteins 
A) hydrolyzed;high-density lipoproteins 
B) hydrolyzed;albumins 
C) oxidized;chylomicrons 
D) oxidized;albumins 
E) polymerized;high-density lipoproteins

Question 6

How many ATP molecules are formed from the complete oxidation of lauric acid,CH3(CH2)10COOH?

Accepted Answer

A) 25 
B) 95 
C) 72 
D) 97 
E) 35 
A) 25 
B) 95 
C) 72 
D) 97 
E) 35

Question 7

What molecule is combined with acetyl-CoA to synthesize the malonyl-CoA that is the source of the two carbons for the elongation of the fatty acid chain?

Accepted Answer

A) H2O 
B) CO2 
C) NADPH 
D) HCO3- 
E) acetate 
A) H2O 
B) CO2 
C) NADPH 
D) HCO3- 
E) acetate

Question 8

Which lipoprotein transports cholesterol to the liver to be recycled or excreted?

Accepted Answer

A) chylomicrons 
B) ultra-high-density lipoproteins 
C) high-density lipoproteins 
D) low-density lipoproteins 
E) very low-density lipoproteins 
A) chylomicrons 
B) ultra-high-density lipoproteins 
C) high-density lipoproteins 
D) low-density lipoproteins 
E) very low-density lipoproteins

Question 9

Which lipoprotein carries the remnants of the VLDLs from peripheral tissue to the liver for use in synthesis?

Accepted Answer

A) HDL 
B) IDL 
C) chylomicrons 
D) LDL 
E) albumin 
A) HDL 
B) IDL 
C) chylomicrons 
D) LDL 
E) albumin

Question 10

Which type of molecule is the major form for long term storage of chemical energy in the body?

Accepted Answer

A) carbohydrates 
B) proteins 
C) triglycerides 
D) steroids 
E) waxes 
A) carbohydrates 
B) proteins 
C) triglycerides 
D) steroids 
E) waxes

Question 11

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

Accepted Answer

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

Question 12

For each acetyl-CoA formed during the β-oxidation of a fatty acid how many ATP molecules are made?

Accepted Answer

A) 4 
B) 8 
C) 12 
D) 14 
E) 16 
A) 4 
B) 8 
C) 12 
D) 14 
E) 16

Question 13

When fats are metabolized,the fatty acids enter the reactions of the

Accepted Answer

A) electron transport chain. 
B) citric acid cycle. 
C) glycolysis pathway. 
D) β-oxidation process. 
E) gluconeogensis. 
A) electron transport chain. 
B) citric acid cycle. 
C) glycolysis pathway. 
D) β-oxidation process. 
E) gluconeogensis.

Question 14

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

Accepted Answer

@#IMG-DLM& Note also that diff

Question 15

How many molecules of acetyl-CoA are needed to synthesize a 16-carbon fatty acid if the process is started with acetyl-S-enzyme-1 and malonyl-CoA?

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 8 
E) 9 
A) 5 
B) 6 
C) 7 
D) 8 
E) 9

Question 16

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would produce ________ molecules of acetyl-CoA.

Accepted Answer

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

Question 17

In order for dietary lipids to be transported in an aqueous system,they are solubilized by

Accepted Answer

A) lipoproteins. 
B) cholesterol. 
C) lipases. 
D) bile. 
E) glycolipids. 
A) lipoproteins. 
B) cholesterol. 
C) lipases. 
D) bile. 
E) glycolipids.

Question 18

Which of the following lipoproteins is used solely for the transport of lipids in the blood?

Accepted Answer

A) chylomicrons 
B) ultra-high-density lipoproteins 
C) high-density lipoproteins 
D) low-density lipoproteins 
E) very low-density lipoproteins 
A) chylomicrons 
B) ultra-high-density lipoproteins 
C) high-density lipoproteins 
D) low-density lipoproteins 
E) very low-density lipoproteins

Question 19

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

Accepted Answer

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

Question 20

Match the following.
-lipogenesis

Accepted Answer

A) a condition which 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) presence of ketone bodies in the urine 
D) the anabolic process of synthesizing fatty acids 
A) a condition which 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) presence of ketone bodies in the urine 
D) the anabolic process of synthesizing fatty acids

Exam 24: Lipid Metabolism

Glycerol produced as a byproduct of metabolism of lipids is converted to ________,which can be isomerized to a compound that can enter glycolysis or gluconeogenesis.

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

Fatty acids are activated for breakdown by conversion to

Fatty acids from triacylglycerols can be ________ when energy is plentiful or ________ when energy is needed.

When energy from stored triacylglycerols is needed,they are ________,and then transported in the bloodstream via ________ as fatty acids.

How many ATP molecules are formed from the complete oxidation of lauric acid,CH3(CH2)10COOH?

What molecule is combined with acetyl-CoA to synthesize the malonyl-CoA that is the source of the two carbons for the elongation of the fatty acid chain?

Which lipoprotein transports cholesterol to the liver to be recycled or excreted?

Which lipoprotein carries the remnants of the VLDLs from peripheral tissue to the liver for use in synthesis?

Which type of molecule is the major form for long term storage of chemical energy in the body?

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

For each acetyl-CoA formed during the β-oxidation of a fatty acid how many ATP molecules are made?

When fats are metabolized,the fatty acids enter the reactions of the

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

How many molecules of acetyl-CoA are needed to synthesize a 16-carbon fatty acid if the process is started with acetyl-S-enzyme-1 and malonyl-CoA?

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would produce ________ molecules of acetyl-CoA.

In order for dietary lipids to be transported in an aqueous system,they are solubilized by

Which of the following lipoproteins is used solely for the transport of lipids in the blood?

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

Match the following. -lipogenesis

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

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

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

Fatty acids from triacylglycerols can be when energy is plentiful or when energy is needed.

When energy from stored triacylglycerols is needed,they are ,and then transported in the bloodstream via as fatty acids.

How many ATP molecules are formed from the complete oxidation of lauric acid,CH₃(CH₂)₁₀COOH?