Question 1

Which enzyme is used in gluconeogenesis, but NOT in glycolysis?

Accepted Answer

A)  PEP carboxykinase 
B)  enolase 
C)  phosphohexose isomerase 
D)  3-phosphoglycerate dehydrogenase 
A)  PEP carboxykinase 
B)  enolase 
C)  phosphohexose isomerase 
D)  3-phosphoglycerate dehydrogenase A

Question 2

The citric acid cycle is linked to the electron transport chain via:

Accepted Answer

A)  NADH 
B)  FAD+ 
C)  O2 
D)  all of these 
E)  a and b 
A)  NADH 
B)  FAD+ 
C)  O2 
D)  all of these 
E)  a and b E

Question 3

Which of the following types of reactions are involved in glycolysis? Select all that apply.

Accepted Answer

A) nucleophilic acyl substitution 
B) oxidation 
C) aldol 
D) reduction 
E) hydrolysis
F)isomerization 
A) nucleophilic acyl substitution 
B) oxidation 
C) aldol 
D) reduction 
E) hydrolysis
F)isomerization A,B,C,F

Question 4

Match a term or structure from the list below to each of the following definitions or names.
Embden-Meyerhoff
Embden-Meyerhoff
-Uses the energy produced in the citric acid cycle to make ATP.

Accepted Answer

A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism 
A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism

Question 5

Which enzyme catalyzes the reaction shown?

Accepted Answer

A)  isocitrate dehydrogenase 
B)  malate dehydrogenase 
C)  fumarase 
D)  succinate dehydrogenase 
A)  isocitrate dehydrogenase 
B)  malate dehydrogenase 
C)  fumarase 
D)  succinate dehydrogenase

Question 6

Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions?

Accepted Answer

A)  isocitrate dehydrogenase and the α-ketoglutarate dehydrogenase complex 
B)  aconitase and succinate dehydrogenase 
C)  the α-ketoglutarate dehydrogenase complex and succinate thiokinase 
D)  fumarase and succinate dehydrogenase 
A)  isocitrate dehydrogenase and the α-ketoglutarate dehydrogenase complex 
B)  aconitase and succinate dehydrogenase 
C)  the α-ketoglutarate dehydrogenase complex and succinate thiokinase 
D)  fumarase and succinate dehydrogenase

Question 7

Consider the following reversible reaction.   This reaction:

Accepted Answer

A)  is catalyzed by the enzyme triose phosphate isomerase 
B)  requires several enzymes 
C)  requires coenzyme A 
D)  requires thiamine pyrophosphate 
A)  is catalyzed by the enzyme triose phosphate isomerase 
B)  requires several enzymes 
C)  requires coenzyme A 
D)  requires thiamine pyrophosphate

Question 8

Match a term or structure from the list below to each of the following definitions or names.
Embden-Meyerhoff
Embden-Meyerhoff
-Acetyl groups are oxidized to yield carbon dioxide and water.

Accepted Answer

A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism 
A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism

Question 9

If gluconeogenesis were the exact reverse of glycolysis, which of the following would not be possible?

Accepted Answer

A)  production and breakdown of glucose involving simpler precursors 
B)  formation of phosphorylated intermediates in both anabolism and catabolism of glucose 
C)  endergonic anabolism and catabolism of glucose 
D)  independent control of the anabolism and catabolism of glucose 
E)  c and d 
A)  production and breakdown of glucose involving simpler precursors 
B)  formation of phosphorylated intermediates in both anabolism and catabolism of glucose 
C)  endergonic anabolism and catabolism of glucose 
D)  independent control of the anabolism and catabolism of glucose 
E)  c and d

Question 10

During the complete catabolism of a molecule of glucose, the ultimate fate of the carbon atoms are

Accepted Answer

A)  pyruvate 
B)  AcetylCoA 
C)  carbon dioxide 
D)  fructose-6-phosphate 
E)  a, b or c 
A)  pyruvate 
B)  AcetylCoA 
C)  carbon dioxide 
D)  fructose-6-phosphate 
E)  a, b or c

Question 11

The order of compounds and intermediates found in the citric acid cycle is as follows:

Accepted Answer

A)  Iso-Citrate → Aconitate → α-Ketoglutarate → Fumarate → Malate → Oxaloacetate 
B)  Aconitate → iso-Citrate → Oxaloacetate → α-Ketoglutarate → Malate → Fumarate 
C)  Aconitate → iso-Citrate → α-Ketoglutarate → Fumarate → Malate → Oxaloacetate 
D)  Aconitate → iso-Citrate → α-Ketoglutarate → Malate → Fumarate → Oxaloacetate 
E)  Iso-Citrate → Aconitate → α-Ketoglutarate → Malate → Oxaloacetate → Fumarate 
A)  Iso-Citrate → Aconitate → α-Ketoglutarate → Fumarate → Malate → Oxaloacetate 
B)  Aconitate → iso-Citrate → Oxaloacetate → α-Ketoglutarate → Malate → Fumarate 
C)  Aconitate → iso-Citrate → α-Ketoglutarate → Fumarate → Malate → Oxaloacetate 
D)  Aconitate → iso-Citrate → α-Ketoglutarate → Malate → Fumarate → Oxaloacetate 
E)  Iso-Citrate → Aconitate → α-Ketoglutarate → Malate → Oxaloacetate → Fumarate

Question 12

Match a term or structure from the list below to each of the following definitions or names.
Embden-Meyerhoff
Embden-Meyerhoff
-The pathway by which organisms make glucose from simple precursors.

Accepted Answer

A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism 
A) electron-transport chain 
B)   
C) citric acid cycle 
D) Embden-Meyerhoff 
E) glycolysis
F) 
G)Hans Krebs
H)catabolism
I)ATP
J) 
K)fatty acid spiral
L)anabolism
M)acetyl CoA
N) 
O) 
P)gluconeogenesis
Q)​metabolism

Question 13

The first reaction of gluconeogenesis is   This reaction is classified as:

Accepted Answer

A)  an oxidative decarboxylation 
B)  a carboxylation 
C)  a redox reaction 
D)  a phosphate transfer 
A)  an oxidative decarboxylation 
B)  a carboxylation 
C)  a redox reaction 
D)  a phosphate transfer

Question 14

Draw and name the major product of the reaction of α-glucose with ATP.

Accepted Answer

α-glucose-

Question 15

When acetyl-CoA reacts with oxaloacetate to form citrate

Accepted Answer

A)  a new carbon-carbon bond is formed 
B)  an oxidative decarboxylation reaction takes place 
C)  a dehydration reaction takes place 
D)  a rearrangement takes place 
A)  a new carbon-carbon bond is formed 
B)  an oxidative decarboxylation reaction takes place 
C)  a dehydration reaction takes place 
D)  a rearrangement takes place

Question 16

At the beginning of polysaccharide catabolism, α-amylase catalyzes:

Accepted Answer

A)  internal (1→6) links 
B)  internal (1→4) links 
C)  terminal (1→6) links 
D)  terminal (1→4) links 
E)  all of these 
A)  internal (1→6) links 
B)  internal (1→4) links 
C)  terminal (1→6) links 
D)  terminal (1→4) links 
E)  all of these

Question 17

Which enzyme catalyzes the reaction shown?

Accepted Answer

A)  an epimerase 
B)  an isomerase 
C)  a mutase 
D)  a dehydrogenase 
A)  an epimerase 
B)  an isomerase 
C)  a mutase 
D)  a dehydrogenase

Question 18

Which of the reactions of the citric acid cycle requires FAD as a coenzyme?

Accepted Answer

A)  the conversion of isocitrate to α-ketoglutarate 
B)  the conversion of α-ketoglutarate to succinyl-CoA 
C)  the conversion of succinate to fumarate 
D)  the conversion of malate to oxaloacetate 
A)  the conversion of isocitrate to α-ketoglutarate 
B)  the conversion of α-ketoglutarate to succinyl-CoA 
C)  the conversion of succinate to fumarate 
D)  the conversion of malate to oxaloacetate

Question 19

Biotin is important in gluconeogenesis for all of these reasons, except:

Accepted Answer

A)  It is necessary to add CO2 to certain intermediates in this pathway. 
B)  CO2 becomes one or more of the 6 carbons in the glucose product. 
C)  Biotin is capable of binding covalently to CO2. 
D)  Biotin helps synthesize an important precursor of phosphoenolpyruvate. 
E)  All of these reactions require the vitamin coenzyme. 
A)  It is necessary to add CO2 to certain intermediates in this pathway. 
B)  CO2 becomes one or more of the 6 carbons in the glucose product. 
C)  Biotin is capable of binding covalently to CO2. 
D)  Biotin helps synthesize an important precursor of phosphoenolpyruvate. 
E)  All of these reactions require the vitamin coenzyme.

Question 20

Consider the reaction below to answer the following question(s).  
-Refer to instructions. This reaction:

Accepted Answer

A)  is catalyzed by an oxidase. 
B)  involves a ring opening 
C)  requires ATP 
D)  occurs in the citric acid cycle 
A)  is catalyzed by an oxidase. 
B)  involves a ring opening 
C)  requires ATP 
D)  occurs in the citric acid cycle

Exam 22: Carbohydrate Metabolism

Which enzyme is used in gluconeogenesis, but NOT in glycolysis?

The citric acid cycle is linked to the electron transport chain via:

Which of the following types of reactions are involved in glycolysis? Select all that apply.

Match a term or structure from the list below to each of the following definitions or names. Embden-Meyerhoff Embden-Meyerhoff -Uses the energy produced in the citric acid cycle to make ATP.

Which enzyme catalyzes the reaction shown?

Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions?

Consider the following reversible reaction. This reaction:

Match a term or structure from the list below to each of the following definitions or names. Embden-Meyerhoff Embden-Meyerhoff -Acetyl groups are oxidized to yield carbon dioxide and water.

If gluconeogenesis were the exact reverse of glycolysis, which of the following would not be possible?

During the complete catabolism of a molecule of glucose, the ultimate fate of the carbon atoms are

The order of compounds and intermediates found in the citric acid cycle is as follows:

Match a term or structure from the list below to each of the following definitions or names. Embden-Meyerhoff Embden-Meyerhoff -The pathway by which organisms make glucose from simple precursors.

The first reaction of gluconeogenesis is This reaction is classified as:

Draw and name the major product of the reaction of α-glucose with ATP.

When acetyl-CoA reacts with oxaloacetate to form citrate

At the beginning of polysaccharide catabolism, α-amylase catalyzes:

Which enzyme catalyzes the reaction shown?

Which of the reactions of the citric acid cycle requires FAD as a coenzyme?

Biotin is important in gluconeogenesis for all of these reasons, except:

Consider the reaction below to answer the following question(s). -Refer to instructions. This reaction:

Structure and Bonding

Polar Covalent Bonds; Acids and Bases

Organic Compounds: Alkanes and Their Stereochemistry

Organic Compounds: Cycloalkanes and Their Stereochemistry

Stereochemistry at Tetrahedral Centers

An Overview of Organic Reactions

Alkenes and Alkynes

Reactions of Alkenes and Alkynes

Aromatic Compounds

Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, and Thiols; Ethers and Sulfides

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Nitriles

Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution and Condensation Reactions

Amines and Heterocycles

Biomolecules: Amino Acids, Peptides, and Proteins

Amino Acid Metabolism

Biomolecules: Carbohydrates

Biomolecules: Lipids and Their Metabolism

Biomolecules: Nucleic Acids and Their Metabolism

Orbitals and Organic Chemistry: Pericyclic Reactionse

Synthetic Polymerse

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