Question 1

Each four-step sequence of beta-oxidation forms one molecule each of which of the following?

Accepted Answer

A) Acetyl CoA,NADH,and FADH2 
B) Pyruvate,NAD+,and FAD 
C) Glucose,NAD+,and FADH2. 
D) Acetyl CoA,NADH,and FAD. 
A) Acetyl CoA,NADH,and FADH2 
B) Pyruvate,NAD+,and FAD 
C) Glucose,NAD+,and FADH2. 
D) Acetyl CoA,NADH,and FAD. A

Question 2

How many molecules of NADH are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)20CO2H?

Accepted Answer

A) 1 
B) 10 
C) 11 
D) 20 
E) 22 
A) 1 
B) 10 
C) 11 
D) 20 
E) 22 B

Question 3

On the fatty acid structure below,identify which carbons are alpha (α)and beta (β),two important positions in the β-oxidation process.

Accepted Answer

A) C1 is alpha and C2 is beta 
B) C3 is alpha and C2 is beta 
C) C6 is alpha and C5 is beta 
D) C5 is alpha and C4 is beta 
E) C4 is alpha and C5 is beta 
A) C1 is alpha and C2 is beta 
B) C3 is alpha and C2 is beta 
C) C6 is alpha and C5 is beta 
D) C5 is alpha and C4 is beta 
E) C4 is alpha and C5 is beta D

Question 4

How is the amino group of an amino acid lost as a result of transamination and oxidative deamination?

Accepted Answer

A) NH2- 
B) NH3 
C) NH4+ 
D) CH3NH2 
A) NH2- 
B) NH3 
C) NH4+ 
D) CH3NH2

Question 5

How many cycles of β-oxidation are needed for complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)18CO2H?

Accepted Answer

A) 1 
B) 9 
C) 10 
D) 18 
E) 20 
A) 1 
B) 9 
C) 10 
D) 18 
E) 20

Question 6

The overall result of transamination and oxidative deamination is to remove an amino group from an amino acid and form an ammonium ion,NH4+.

Accepted Answer

A) True 
 B)False

Question 7

Step [7] of glycolysis is shown below. Which statement concerning this step is true?

Accepted Answer

A) The hydrolysis of ATP provides the necessary energy for the removal of a phosphate group from 1,3-bisphosphoglycerate. 
B) The formation of 3-phosphoglycerate provides the necessary energy for the phosphorylation of ADP. 
C) The energy required in the hydrolysis of 1,3-bisphosphoglycerate is stored in ADP. 
D) The hydrolysis of 1,3-bisphosphoglycerate is an unfavorable reaction. 
A) The hydrolysis of ATP provides the necessary energy for the removal of a phosphate group from 1,3-bisphosphoglycerate. 
B) The formation of 3-phosphoglycerate provides the necessary energy for the phosphorylation of ADP. 
C) The energy required in the hydrolysis of 1,3-bisphosphoglycerate is stored in ADP. 
D) The hydrolysis of 1,3-bisphosphoglycerate is an unfavorable reaction.

Question 8

How many moles of ATP per gram of fatty acid are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)24CO2H (molar mass 397 g/mol)?

Accepted Answer

A) 0.0806 moles ATP / g fatty acid 
B) 0.297 moles ATP / g fatty acid 
C) 0.423 moles ATP / g fatty acid 
D) 0.443 moles ATP / g fatty acid 
E) 0.448 moles ATP / g fatty acid 
A) 0.0806 moles ATP / g fatty acid 
B) 0.297 moles ATP / g fatty acid 
C) 0.423 moles ATP / g fatty acid 
D) 0.443 moles ATP / g fatty acid 
E) 0.448 moles ATP / g fatty acid

Question 9

How many molecules of ATP are formed per carbon atom in the fatty acid during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)24CO2H?

Accepted Answer

A) 1.23 molecules ATP / carbon atom in the fatty acid 
B) 4.54 molecules ATP / carbon atom in the fatty acid 
C) 6.46 molecules ATP / carbon atom in the fatty acid 
D) 6.77 molecules ATP / carbon atom in the fatty acid 
E) 6.85 molecules ATP / carbon atom in the fatty acid 
A) 1.23 molecules ATP / carbon atom in the fatty acid 
B) 4.54 molecules ATP / carbon atom in the fatty acid 
C) 6.46 molecules ATP / carbon atom in the fatty acid 
D) 6.77 molecules ATP / carbon atom in the fatty acid 
E) 6.85 molecules ATP / carbon atom in the fatty acid

Question 10

The first step in gluconeogenesis is the oxidation of lactate. What product is formed when lactate is oxidized?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 11

Which amino acid is classified as ketogenic?

Accepted Answer

A) Histidine 
B) Valine 
C) Arginine 
D) Leucine 
A) Histidine 
B) Valine 
C) Arginine 
D) Leucine

Question 12

When oxygen is plentiful,pyruvate is converted to acetyl CoA,which can enter the citric acid cycle.

Accepted Answer

A) True 
 B)False

Question 13

What is the starting material in step [1] in gluconeogenesis?

Accepted Answer

A) Glucose 
B) Galactose 
C) Pyruvate 
D) Lactate 
E) Acetyl CoA 
A) Glucose 
B) Galactose 
C) Pyruvate 
D) Lactate 
E) Acetyl CoA

Question 14

________ is the synthesis of glucose from noncarbohydrate sources-lactate,amino acids,or glycerol.

Accepted Answer

The answer of ________ is the synthesis of glucose from...

Question 15

Fatty acid oxidation begins with the conversion of a fatty acid into a thioester with coenzyme A.

Accepted Answer

A) True 
 B)False

Question 16

Which amino acid is classified as glucogenic?

Accepted Answer

A) Leucine 
B) Proline 
C) Lysine 
D) None of the amino acids are classified as glucogenic. 
A) Leucine 
B) Proline 
C) Lysine 
D) None of the amino acids are classified as glucogenic.

Question 17

Low carbohydrate diets such as the Atkins diet induce the catabolism of stored fat for energy production to assist in weight loss.

Accepted Answer

A) True 
 B)False

Question 18

The β-oxidation of a fatty acid may be described as which type of metabolic pathway?

Accepted Answer

A) An anabolic pathway 
B) A cyclic pathway 
C) A spiral pathway 
D) A linear pathway 
A) An anabolic pathway 
B) A cyclic pathway 
C) A spiral pathway 
D) A linear pathway

Question 19

What metabolic conditions induce ketosis?

Accepted Answer

A) starvation 
B) vigorous dieting 
C) uncontrolled diabetes 
D) All of the choices are correct. 
E) None of the choices are correct. 
A) starvation 
B) vigorous dieting 
C) uncontrolled diabetes 
D) All of the choices are correct. 
E) None of the choices are correct.

Question 20

What metabolic intermediate is formed from the carbon skeleton of the amino acid valine?

Accepted Answer

A) α-ketoglutarate 
B) Oxaloacetate 
C) Citrate 
D) Succinyl CoA 
E) Fumarate 
A) α-ketoglutarate 
B) Oxaloacetate 
C) Citrate 
D) Succinyl CoA 
E) Fumarate

Exam 24: Carbohydrate,lipid,and Protein Metabolism

Each four-step sequence of beta-oxidation forms one molecule each of which of the following?

How many molecules of NADH are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)20CO2H?

On the fatty acid structure below,identify which carbons are alpha (α)and beta (β),two important positions in the β-oxidation process.

How is the amino group of an amino acid lost as a result of transamination and oxidative deamination?

How many cycles of β-oxidation are needed for complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)18CO2H?

The overall result of transamination and oxidative deamination is to remove an amino group from an amino acid and form an ammonium ion,NH4+.

Step [7] of glycolysis is shown below. Which statement concerning this step is true?

How many moles of ATP per gram of fatty acid are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)24CO2H (molar mass 397 g/mol)?

How many molecules of ATP are formed per carbon atom in the fatty acid during the complete catabolism of a saturated fatty acid with the chemical formula CH3(CH2)24CO2H?

The first step in gluconeogenesis is the oxidation of lactate. What product is formed when lactate is oxidized?

Which amino acid is classified as ketogenic?

When oxygen is plentiful,pyruvate is converted to acetyl CoA,which can enter the citric acid cycle.

What is the starting material in step [1] in gluconeogenesis?

________ is the synthesis of glucose from noncarbohydrate sources-lactate,amino acids,or glycerol.

Fatty acid oxidation begins with the conversion of a fatty acid into a thioester with coenzyme A.

Which amino acid is classified as glucogenic?

Low carbohydrate diets such as the Atkins diet induce the catabolism of stored fat for energy production to assist in weight loss.

The β-oxidation of a fatty acid may be described as which type of metabolic pathway?

What metabolic conditions induce ketosis?

What metabolic intermediate is formed from the carbon skeleton of the amino acid valine?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Filters

How many molecules of NADH are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH₃(CH₂)₂₀CO₂H?

How many cycles of β-oxidation are needed for complete catabolism of a saturated fatty acid with the chemical formula CH₃(CH₂)₁₈CO₂H?

The overall result of transamination and oxidative deamination is to remove an amino group from an amino acid and form an ammonium ion,NH₄⁺.

How many moles of ATP per gram of fatty acid are formed during the complete catabolism of a saturated fatty acid with the chemical formula CH₃(CH₂)₂₄CO₂H (molar mass 397 g/mol)?

How many molecules of ATP are formed per carbon atom in the fatty acid during the complete catabolism of a saturated fatty acid with the chemical formula CH₃(CH₂)₂₄CO₂H?