Question 1

Which of the following amino acids produces pyruvate on transamination?

Accepted Answer

A)  alanine 
B)  glutamine 
C)  glycine 
D)  leucine 
A)  alanine 
B)  glutamine 
C)  glycine 
D)  leucine

Question 2

Which of the following compounds is consumed in the process of converting glycerol to dihydroxyacetone phosphate?

Accepted Answer

A)  ADP 
B)  NADH 
C)  both ADP and NADH 
D)  neither ADP nor NADH 
A)  ADP 
B)  NADH 
C)  both ADP and NADH 
D)  neither ADP nor NADH

Question 3

Which of the following is the cause of muscle cramps associated with strenuous exercise?

Accepted Answer

A)  acetate accumulation in muscles 
B)  citrate accumulation in muscles 
C)  lactate accumulation in muscles 
D)  pyruvate accumulation in muscles 
A)  acetate accumulation in muscles 
B)  citrate accumulation in muscles 
C)  lactate accumulation in muscles 
D)  pyruvate accumulation in muscles

Question 4

Which of the following reactions is involved in the conversion of 3-phosphoglycerate from 1,3-bisphosphoglycerate?

Accepted Answer

A)  addition 
B)  dephosphorylation 
C)  phosphorylation 
D)  oxidation 
A)  addition 
B)  dephosphorylation 
C)  phosphorylation 
D)  oxidation

Question 5

How many ATP molecules are produced as a result of the complete metabolism of one molecule of glucose in skeletal muscles?

Accepted Answer

A)  4 
B)  6 
C)  24 
D)  30 
A)  4 
B)  6 
C)  24 
D)  30

Question 6

What is the role of the enzyme phosphoglycerate mutase?

Accepted Answer

A)  It catalyzes the hydrolysis of 3-phosphoglycerate. 
B)  It catalyzes the isomerization of 3-phosphoglycerate. 
C)  It catalyzes the oxidation of 3-phosphoglycerate. 
D)  It catalyzes the reduction of 3-phosphoglycerate. 
A)  It catalyzes the hydrolysis of 3-phosphoglycerate. 
B)  It catalyzes the isomerization of 3-phosphoglycerate. 
C)  It catalyzes the oxidation of 3-phosphoglycerate. 
D)  It catalyzes the reduction of 3-phosphoglycerate.

Question 7

Which of the following gases is a by-product of the reaction between pyruvate and coenzyme A?

Accepted Answer

A)  CO 
B)  CO2 
C)  O2 
D)  none of these 
A)  CO 
B)  CO2 
C)  O2 
D)  none of these

Question 8

Which of the following statements is true of the urea cycle?

Accepted Answer

A)  It generates molecules that can enter the common metabolic pathway. 
B)  It removes the NH4+ that is produced during oxidative deamination. 
C)  Both these statements are true. 
D)  Neither of these statements is true. 
A)  It generates molecules that can enter the common metabolic pathway. 
B)  It removes the NH4+ that is produced during oxidative deamination. 
C)  Both these statements are true. 
D)  Neither of these statements is true.

Question 9

Which of the following reactions is involved in the conversion of pyruvate to acetyl coenzyme A?

Accepted Answer

A)  oxidative phosphorylation 
B)  oxidative deamination 
C)  oxidative decarboxylation 
D)  oxidative transamination 
A)  oxidative phosphorylation 
B)  oxidative deamination 
C)  oxidative decarboxylation 
D)  oxidative transamination

Question 10

Which of the following statements is true of the reactions of glycolysis?

Accepted Answer

A)  All the reactions of glycolysis occur in the cytoplasm. 
B)  All the reactions of glycolysis occur in the mitochondria. 
C)  All the reactions of glycolysis occur in the presence of oxygen. 
D)  All the reactions of glycolysis require ATP as an energy source. 
A)  All the reactions of glycolysis occur in the cytoplasm. 
B)  All the reactions of glycolysis occur in the mitochondria. 
C)  All the reactions of glycolysis occur in the presence of oxygen. 
D)  All the reactions of glycolysis require ATP as an energy source.

Question 11

What is the role of the enzyme hydroxyacyl-CoA dehydrogenase in the β-oxidation of saturated fatty acids?

Accepted Answer

A)  It converts an α-hydroxyacyl-CoA to an α-ketoacyl-CoA. 
B)  It converts a β-hydroxyacyl-CoA to a β-ketoacyl-CoA. 
C)  Both of these are the functions of hydroxyacyl-CoA dehydrogenase. 
D)  Neither of these is the function of hydroxyacyl-CoA dehydrogenase. 
A)  It converts an α-hydroxyacyl-CoA to an α-ketoacyl-CoA. 
B)  It converts a β-hydroxyacyl-CoA to a β-ketoacyl-CoA. 
C)  Both of these are the functions of hydroxyacyl-CoA dehydrogenase. 
D)  Neither of these is the function of hydroxyacyl-CoA dehydrogenase.

Question 12

What is the fate of NADH + H+ produced during the catabolism of amino acids?

Accepted Answer

A)  It enters the citric acid cycle. 
B)  It enters the glycolytic pathway. 
C)  It enters the urea cycle. 
D)  It enters the oxidative phosphorylation pathway. 
A)  It enters the citric acid cycle. 
B)  It enters the glycolytic pathway. 
C)  It enters the urea cycle. 
D)  It enters the oxidative phosphorylation pathway.

Question 13

How many molecules of ATP is/are produced or consumed during the formation of a molecule of carbamoyl phosphate?

Accepted Answer

A)  Two molecules of ATP are produced. 
B)  One molecule of ATP is produced. 
C)  One molecule of ATP is consumed. 
D)  Two molecules of ATP are consumed. 
A)  Two molecules of ATP are produced. 
B)  One molecule of ATP is produced. 
C)  One molecule of ATP is consumed. 
D)  Two molecules of ATP are consumed.

Question 14

Which of the following statements is true of the complete metabolism of a molecule of stearic acid?

Accepted Answer

A)  It yields eight FADH2, five NAD+, and nine molecules of acetyl CoA. 
B)  It yields five FADH2 and five molecules of acetyl CoA. 
C)  It yields eight FADH2, eight NADH + H+, and nine molecules of acetyl CoA. 
D)  It yields five NAD+ and five molecules of acetyl CoA. 
A)  It yields eight FADH2, five NAD+, and nine molecules of acetyl CoA. 
B)  It yields five FADH2 and five molecules of acetyl CoA. 
C)  It yields eight FADH2, eight NADH + H+, and nine molecules of acetyl CoA. 
D)  It yields five NAD+ and five molecules of acetyl CoA.

Question 15

What is the role of NADPH in red blood cells?

Accepted Answer

A)  It provides energy to red blood cells. 
B)  It protects red blood cells against oxidative damage. 
C)  It assists in the storage of iron in red blood cells. 
D)  It maintains the pigment in red blood cells. 
A)  It provides energy to red blood cells. 
B)  It protects red blood cells against oxidative damage. 
C)  It assists in the storage of iron in red blood cells. 
D)  It maintains the pigment in red blood cells.

Question 16

Which of the following is the first product formed during glycerol catabolism?

Accepted Answer

A)  glycerol 1-phosphate 
B)  glycerol 2-phosphate 
C)  glycerol 1,2-bisphosphate 
D)  glycerol 1,3-bisphosphate 
A)  glycerol 1-phosphate 
B)  glycerol 2-phosphate 
C)  glycerol 1,2-bisphosphate 
D)  glycerol 1,3-bisphosphate

Question 17

Which of the following compounds is the product of the first step of glycolysis?

Accepted Answer

A)  fructose 
B)  glucose 
C)  glucose 1-phosphate 
D)  glucose 6-phosphate 
A)  fructose 
B)  glucose 
C)  glucose 1-phosphate 
D)  glucose 6-phosphate

Question 18

Which of the following statements is true of NADH and H+ molecules produced during glycolysis?

Accepted Answer

A)  They are produced in the cytoplasm; hence, they can be used directly in oxidative phosphorylation. 
B)  They are produced in the mitochondria; hence, they can be used directly in oxidative phosphorylation. 
C)  They are produced in the cytoplasm; hence, they cannot be used directly in oxidative phosphorylation. 
D)  They are produced in the mitochondria; hence, they cannot be used directly in oxidative phosphorylation. 
A)  They are produced in the cytoplasm; hence, they can be used directly in oxidative phosphorylation. 
B)  They are produced in the mitochondria; hence, they can be used directly in oxidative phosphorylation. 
C)  They are produced in the cytoplasm; hence, they cannot be used directly in oxidative phosphorylation. 
D)  They are produced in the mitochondria; hence, they cannot be used directly in oxidative phosphorylation.

Question 19

Which of the following compounds is a product of lipase-catalyzed lipid hydrolysis?

Accepted Answer

A)  fatty acid 
B)  glycerol 
C)  monoglyceride 
D)  all of these 
A)  fatty acid 
B)  glycerol 
C)  monoglyceride 
D)  all of these

Question 20

Examine the diagram of the given fatty acid.   The given fatty acid enters the β-oxidation spiral and yields the product as shown below.   How many FADH2 are produced in this process?

Accepted Answer

A)  10 
B)  5 
C)  4 
D)  1 
A)  10 
B)  5 
C)  4 
D)  1

Exam 27: Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Which of the following amino acids produces pyruvate on transamination?

Which of the following compounds is consumed in the process of converting glycerol to dihydroxyacetone phosphate?

Which of the following is the cause of muscle cramps associated with strenuous exercise?

Which of the following reactions is involved in the conversion of 3-phosphoglycerate from 1,3-bisphosphoglycerate?

How many ATP molecules are produced as a result of the complete metabolism of one molecule of glucose in skeletal muscles?

What is the role of the enzyme phosphoglycerate mutase?

Which of the following gases is a by-product of the reaction between pyruvate and coenzyme A?

Which of the following statements is true of the urea cycle?

Which of the following reactions is involved in the conversion of pyruvate to acetyl coenzyme A?

Which of the following statements is true of the reactions of glycolysis?

What is the role of the enzyme hydroxyacyl-CoA dehydrogenase in the β-oxidation of saturated fatty acids?

What is the fate of NADH + H+ produced during the catabolism of amino acids?

How many molecules of ATP is/are produced or consumed during the formation of a molecule of carbamoyl phosphate?

Which of the following statements is true of the complete metabolism of a molecule of stearic acid?

What is the role of NADPH in red blood cells?

Which of the following is the first product formed during glycerol catabolism?

Which of the following compounds is the product of the first step of glycolysis?

Which of the following statements is true of NADH and H+ molecules produced during glycolysis?

Which of the following compounds is a product of lipase-catalyzed lipid hydrolysis?

Examine the diagram of the given fatty acid. The given fatty acid enters the β-oxidation spiral and yields the product as shown below. How many FADH2 are produced in this process?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

What is the fate of NADH + H⁺ produced during the catabolism of amino acids?

Which of the following statements is true of NADH and H⁺ molecules produced during glycolysis?

Examine the diagram of the given fatty acid. The given fatty acid enters the β-oxidation spiral and yields the product as shown below. How many FADH₂ are produced in this process?