Question 1

Which step is found in the breakdown of a fat?

Accepted Answer

A) an activation that requires 1 ATP 
B) an oxidation with a cytochrome 
C) an oxidation with CoQ 
D) direct substrate phosphorylation 
E) production of pyruvate 
A) an activation that requires 1 ATP 
B) an oxidation with a cytochrome 
C) an oxidation with CoQ 
D) direct substrate phosphorylation 
E) production of pyruvate

Question 2

The small droplets of fat that are the first step in the digestion of dietary fats are called

Accepted Answer

A) emulsions. 
B) detergents. 
C) bile drops. 
D) lipoproteins. 
E) micelles. 
A) emulsions. 
B) detergents. 
C) bile drops. 
D) lipoproteins. 
E) micelles.

Question 3

Myristic acid, a C14 fatty acid, undergoes the β-oxidation cycle ________ times.

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 7 
E) 14 
A) 2 
B) 4 
C) 6 
D) 7 
E) 14

Question 4

Red blood cells do not metabolize fatty acids because they have

Accepted Answer

A) no nucleus. 
B) a cell wall. 
C) a cell membrane. 
D) no mitochondria. 
E) no DNA. 
A) no nucleus. 
B) a cell wall. 
C) a cell membrane. 
D) no mitochondria. 
E) no DNA.

Question 5

The energy released by the β oxidation of a cis fatty acid is

Accepted Answer

A) slightly more than that obtained from a trans fatty acid. 
B) slightly less than that obtained from a trans fatty acid. 
C) the same as that obtained from a trans fatty acid. 
D) less than that obtained from one glucose molecule. 
E) used immediately to form ATP. 
A) slightly more than that obtained from a trans fatty acid. 
B) slightly less than that obtained from a trans fatty acid. 
C) the same as that obtained from a trans fatty acid. 
D) less than that obtained from one glucose molecule. 
E) used immediately to form ATP.

Question 6

The complete oxidation of CH₃(CH2)8COOH produces ________ molecules of ATP.

Accepted Answer

A) 80 
B) 78 
C) 82 
D) 64 
E) 76 
A) 80 
B) 78 
C) 82 
D) 64 
E) 76

Question 7

The removal of 2-carbon segments of a fatty acid for further metabolism is called

Accepted Answer

A) β oxidation. 
B) transamination. 
C) deglyceration. 
D) dehydration. 
E) decarboxylation. 
A) β oxidation. 
B) transamination. 
C) deglyceration. 
D) dehydration. 
E) decarboxylation.

Question 8

Which metabolic substrate can be produced from the carbon atoms in the amino acid valine?

Accepted Answer

A) pyruvate 
B) succinyl CoA 
C) acetoacetyl CoA 
D) fumarate 
A) pyruvate 
B) succinyl CoA 
C) acetoacetyl CoA 
D) fumarate

Question 9

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation.

Accepted Answer

A) True 
 B)False

Question 10

Fatty acids and glycerol are produced from the metabolism of

Accepted Answer

A) lipids. 
B) proteins. 
C) carbohydrates. 
D) amino acids. 
E) glucose. 
A) lipids. 
B) proteins. 
C) carbohydrates. 
D) amino acids. 
E) glucose.

Question 11

All of the nonessential amino acids can be synthesized in the body by transamination, using an amino group from

Accepted Answer

A) glutamate. 
B) α-ketoglutarate. 
C) pyruvate. 
D) oxaloacetate. 
E) lactic acid. 
A) glutamate. 
B) α-ketoglutarate. 
C) pyruvate. 
D) oxaloacetate. 
E) lactic acid.

Question 12

The 2-carbon units obtained by degradation of a fatty acid are further metabolized in

Accepted Answer

A) gluconeogenesis. 
B) the citric acid cycle. 
C) β oxidation. 
D) glycolysis. 
E) transamination. 
A) gluconeogenesis. 
B) the citric acid cycle. 
C) β oxidation. 
D) glycolysis. 
E) transamination.

Question 13

What is the total number of ATP molecules produced from the lauric acid (C12H24O2) found in coconut oil?

Accepted Answer

A) 78 ATP 
B) 90 ATP 
C) 100 ATP 
D) 97 ATP 
E) 95 ATP 
A) 78 ATP 
B) 90 ATP 
C) 100 ATP 
D) 97 ATP 
E) 95 ATP

Question 14

A chylomicron is a

Accepted Answer

A) lipase. 
B) digestive enzyme. 
C) triacylglycerol. 
D) transport lipoprotein. 
E) storage protein. 
A) lipase. 
B) digestive enzyme. 
C) triacylglycerol. 
D) transport lipoprotein. 
E) storage protein.

Question 15

A ten carbon saturated fatty acid will undergo five β oxidation cycles.

Accepted Answer

A) True 
 B)False

Question 16

Most of the glycerol produced by fatty acid breakdown goes to the

Accepted Answer

A) pancreas. 
B) gall bladder. 
C) liver. 
D) small intestine. 
E) brain. 
A) pancreas. 
B) gall bladder. 
C) liver. 
D) small intestine. 
E) brain.

Question 17

The letters ACP stand for

Accepted Answer

A) acetyl Coenzyme P. 
B) aconitate protein complex. 
C) acetyl condensing protein. 
D) acyl carrier protein. 
E) acetyl CoA-palmitate. 
A) acetyl Coenzyme P. 
B) aconitate protein complex. 
C) acetyl condensing protein. 
D) acyl carrier protein. 
E) acetyl CoA-palmitate.

Question 18

Which metabolic substrate can be produced from the carbon atoms in the amino acid phenylalanine?

Accepted Answer

A) pyruvate 
B) succinyl CoA 
C) acetoacetyl CoA 
D) fumarate 
A) pyruvate 
B) succinyl CoA 
C) acetoacetyl CoA 
D) fumarate

Question 19

The initial digestion of protein is catalyzed by an enzyme called

Accepted Answer

A) chymotrypsin. 
B) peptidase. 
C) pepsin. 
D) amylase. 
E) trypsin. 
A) chymotrypsin. 
B) peptidase. 
C) pepsin. 
D) amylase. 
E) trypsin.

Question 20

Acyl carrier protein is used in

Accepted Answer

A) β oxidation. 
B) lipogenesis. 
C) gluconeogenesis. 
D) acetyl CoA production. 
E) fatty acid degradation. 
A) β oxidation. 
B) lipogenesis. 
C) gluconeogenesis. 
D) acetyl CoA production. 
E) fatty acid degradation.

Exam 24: Metabolic Pathways for Lipids and Amino Acids

Which step is found in the breakdown of a fat?

The small droplets of fat that are the first step in the digestion of dietary fats are called

Myristic acid, a C14 fatty acid, undergoes the β-oxidation cycle ________ times.

Red blood cells do not metabolize fatty acids because they have

The energy released by the β oxidation of a cis fatty acid is

The complete oxidation of CH₃(CH2)8COOH produces ________ molecules of ATP.

The removal of 2-carbon segments of a fatty acid for further metabolism is called

Which metabolic substrate can be produced from the carbon atoms in the amino acid valine?

The urea cycle is the major pathway for eliminating the excess nitrogen from amino acid degradation.

Fatty acids and glycerol are produced from the metabolism of

All of the nonessential amino acids can be synthesized in the body by transamination, using an amino group from

The 2-carbon units obtained by degradation of a fatty acid are further metabolized in

What is the total number of ATP molecules produced from the lauric acid (C12H24O2) found in coconut oil?

A chylomicron is a

A ten carbon saturated fatty acid will undergo five β oxidation cycles.

Most of the glycerol produced by fatty acid breakdown goes to the

The letters ACP stand for

Which metabolic substrate can be produced from the carbon atoms in the amino acid phenylalanine?

The initial digestion of protein is catalyzed by an enzyme called

Acyl carrier protein is used in

Chemistry in Our Lives

Chemistry and Measurements

Energy and Matter

Atoms

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Filters

Myristic acid, a C₁₄ fatty acid, undergoes the β-oxidation cycle ________ times.

The complete oxidation of CH₃(CH₂)₈COOH produces ________ molecules of ATP.

What is the total number of ATP molecules produced from the lauric acid (C₁₂H₂₄O₂) found in coconut oil?