Question 1

The bile which is secreted by the liver into the gallbladder,contains

Accepted Answer

A) bile acids. 
B) cholesterol. 
C) phospholipids. 
D) bicarbonate ions. 
E) all of these 
A) bile acids. 
B) cholesterol. 
C) phospholipids. 
D) bicarbonate ions. 
E) all of these

Question 2

The formation of malonyl CoA from acetyl CoA and CO2 also requires the presence of

Accepted Answer

A) cyclic AMP. 
B) ATP. 
C) glucose. 
D) FAD. 
A) cyclic AMP. 
B) ATP. 
C) glucose. 
D) FAD.

Question 3

During the first step of lipogenesis,what molecule is released upon the reaction of acetyl-CoA and malonyl-ACP?

Accepted Answer

A) H2O 
B) CO2 
C) NADPH 
D) NADP+ 
E) acetate 
A) H2O 
B) CO2 
C) NADPH 
D) NADP+ 
E) acetate

Question 4

Which of the following substances are produced from hydrolysis of dietary fats in the small intestine?

Accepted Answer

A) bile salts 
B) triglycerides 
C) fatty acids 
D) amino acids 
E) monosaccharides 
A) bile salts 
B) triglycerides 
C) fatty acids 
D) amino acids 
E) monosaccharides

Question 5

In the synthesis of triacylglycerides,fatty acids must react with ________ before they can attach to the glycerol backbone.

Accepted Answer

A) ATP 
B) cholesterol 
C) carnitine 
D) coenzyme A 
E) glycerol 3-phosphate 
A) ATP 
B) cholesterol 
C) carnitine 
D) coenzyme A 
E) glycerol 3-phosphate

Question 6

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would require ________ turns of the β-oxidation cycle.

Accepted Answer

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

Question 7

After digestion and absorption,the molecules from dietary fats and oils are transported in the bloodstream as

Accepted Answer

A) glycerol. 
B) fatty acids. 
C) cholesterol. 
D) citric acid. 
E) enzymes. 
A) glycerol. 
B) fatty acids. 
C) cholesterol. 
D) citric acid. 
E) enzymes.

Question 8

What cofactors are needed for lipogenesis?

Accepted Answer

A) ATP 
B) NADPH 
C) Coenzyme A (CoA-SH) 
D) all of these 
E) none of these 
A) ATP 
B) NADPH 
C) Coenzyme A (CoA-SH) 
D) all of these 
E) none of these

Question 9

Which has greater "energy density," carbohydrates or fats.Explain your answer in terms of molecular structure and net energy production.

Accepted Answer

Fats have a greater energy density than

Question 10

Ketoacidosis is the

Accepted Answer

A) increase of blood pH in response to the accumulation of ketone bodies. 
B) decrease in blood pH in response to the accumulation of ketone bodies. 
C) increase of blood pH in response to the decrease in the amount of ketone bodies. 
D) decrease of blood pH in response to the decrease in the amount of ketone bodies. 
E) none of these 
A) increase of blood pH in response to the accumulation of ketone bodies. 
B) decrease in blood pH in response to the accumulation of ketone bodies. 
C) increase of blood pH in response to the decrease in the amount of ketone bodies. 
D) decrease of blood pH in response to the decrease in the amount of ketone bodies. 
E) none of these

Question 11

Which statements are true for the process of β-oxidation?
I.It occurs in the mitochondria.
II.Acyl carrier proteins are involved.
III.NADPH is the coenzyme.
IV.The molecule increases in length by two carbons.
V.Energy is released in the process.

Accepted Answer

A) I,III,V 
B) II,IV 
C) I,V 
D) I,II,III,IV,V 
E) II,III,IV 
A) I,III,V 
B) II,IV 
C) I,V 
D) I,II,III,IV,V 
E) II,III,IV

Question 12

Ketogenesis occurs from a(an)

Accepted Answer

A) underproduction of ketone bodies. 
B) consumption of too much sugar. 
C) overproduction of acetyl CoA. 
D) underproduction of acetyl CoA. 
E) overproduction of ketone bodies. 
A) underproduction of ketone bodies. 
B) consumption of too much sugar. 
C) overproduction of acetyl CoA. 
D) underproduction of acetyl CoA. 
E) overproduction of ketone bodies.

Question 13

Ketone bodies are primarily produced in ________ cells.

Accepted Answer

A) brain 
B) heart 
C) liver 
D) kidney 
E) red blood 
A) brain 
B) heart 
C) liver 
D) kidney 
E) red blood

Question 14

When fatty acid metabolism creates more acetyl-CoA than can be handled in the citric acid cycle,the excess acetyl-CoA is converted into

Accepted Answer

A) ketone bodies. 
B) amino acids. 
C) cholesterol. 
D) fatty alcohols. 
E) glycerol. 
A) ketone bodies. 
B) amino acids. 
C) cholesterol. 
D) fatty alcohols. 
E) glycerol.

Question 15

High concentrations of ketone bodies in the bloodstream may indicate

Accepted Answer

A) diabetes mellitus. 
B) starvation. 
C) a decrease in the pH of the blood. 
D) All responses are correct. 
E) No responses are correct. 
A) diabetes mellitus. 
B) starvation. 
C) a decrease in the pH of the blood. 
D) All responses are correct. 
E) No responses are correct.

Question 16

The intermediate that carries two-carbon units to be added to a fatty acid chain is

Accepted Answer

A) malonyl-CoA. 
B) fatty acyl-CoA. 
C) carnitine. 
D) ATP. 
E) glycerol 3-phosphate. 
A) malonyl-CoA. 
B) fatty acyl-CoA. 
C) carnitine. 
D) ATP. 
E) glycerol 3-phosphate.

Question 17

How many ATP molecules are formed from the complete oxidation of palmitic acid,CH3(CH2)14COOH?

Accepted Answer

A) 96 
B) 129 
C) 35 
D) 134 
E) 94 
A) 96 
B) 129 
C) 35 
D) 134 
E) 94

Question 18

The fluid that is secreted by the liver into the gall bladder during digestion is called

Accepted Answer

A) cholesterol. 
B) bile. 
C) lipoprotein. 
D) phospholipid. 
E) cytosol. 
A) cholesterol. 
B) bile. 
C) lipoprotein. 
D) phospholipid. 
E) cytosol.

Question 19

Which lipoprotein transports cholesterol from the liver to sites where it is used in cell membranes or in steroid synthesis?

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 20

In comparing the potential energy of lipids and carbohydrates on a weight basis,it is correct to say that lipids provide

Accepted Answer

A) considerably less energy than carbohydrates. 
B) slightly less energy than carbohydrates. 
C) almost the same amount of energy as carbohydrates. 
D) slightly more energy than carbohydrates. 
E) considerably more energy than carbohydrates. 
A) considerably less energy than carbohydrates. 
B) slightly less energy than carbohydrates. 
C) almost the same amount of energy as carbohydrates. 
D) slightly more energy than carbohydrates. 
E) considerably more energy than carbohydrates.

Exam 24: Lipid Metabolism

The bile which is secreted by the liver into the gallbladder,contains

The formation of malonyl CoA from acetyl CoA and CO2 also requires the presence of

During the first step of lipogenesis,what molecule is released upon the reaction of acetyl-CoA and malonyl-ACP?

Which of the following substances are produced from hydrolysis of dietary fats in the small intestine?

In the synthesis of triacylglycerides,fatty acids must react with ________ before they can attach to the glycerol backbone.

The complete metabolism of one molecule of stearic acid,a fatty acid with 18 atoms of carbon,would require ________ turns of the β-oxidation cycle.

After digestion and absorption,the molecules from dietary fats and oils are transported in the bloodstream as

What cofactors are needed for lipogenesis?

Which has greater "energy density," carbohydrates or fats.Explain your answer in terms of molecular structure and net energy production.

Ketoacidosis is the

Which statements are true for the process of β-oxidation? I.It occurs in the mitochondria. II.Acyl carrier proteins are involved. III.NADPH is the coenzyme. IV.The molecule increases in length by two carbons. V.Energy is released in the process.

Ketogenesis occurs from a(an)

Ketone bodies are primarily produced in ________ cells.

When fatty acid metabolism creates more acetyl-CoA than can be handled in the citric acid cycle,the excess acetyl-CoA is converted into

High concentrations of ketone bodies in the bloodstream may indicate

The intermediate that carries two-carbon units to be added to a fatty acid chain is

How many ATP molecules are formed from the complete oxidation of palmitic acid,CH3(CH2)14COOH?

The fluid that is secreted by the liver into the gall bladder during digestion is called

Which lipoprotein transports cholesterol from the liver to sites where it is used in cell membranes or in steroid synthesis?

In comparing the potential energy of lipids and carbohydrates on a weight basis,it is correct to say that lipids provide

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

The formation of malonyl CoA from acetyl CoA and CO₂ also requires the presence of

How many ATP molecules are formed from the complete oxidation of palmitic acid,CH₃(CH₂)₁₄COOH?