Question 1

Describe how molecules such as maltose can enter glycolysis.

Accepted Answer

Maltose is cleaved by maltase ...

Question 2

In which of the following metabolic conversions is ATP "consumed" during glycolysis?

Accepted Answer

A)   1,3-Bisphosphoglycerate  →\rightarrow→  3-phosphoglycerate
B)   glucose  →\rightarrow→  glucose-6-phosphate
C)   2-Phosphoglycerate  →\rightarrow→  3-phosphoglycerate
D)   glucose-6-phosphate  →\rightarrow→  fructose-6-phosphate E) C) and D)
F) B) and D)

Question 3

Which of the following is the correct formula for glucose?

Accepted Answer

A)  C12H22O11
B)   C6H 12O6
C)   C6H6O6
D)   C14N2H 18O5E) None of the above
F) A) and C)

Question 4

In the reaction A →\rightarrow→ B, if at equilibrium [B] >> [A], what can be said about the directionality of the reaction?

Accepted Answer

A)   strongly favored in the forward direction
B)   strongly favored in the reverse direction
C)   strongly favored in both directions
D)   Not enough information is given. E) None of the above
F) B) and C)

Question 5

List the major metabolic pathways in plants and classify each as either an energy conversion pathway or a synthesis/degradation pathway.

Accepted Answer

Pentose phosphate pathway, gluconeogenes...

Question 6

Which of these cofactors participates directly in MOST of the redox reactions in the fermentation of glucose to lactate?

Accepted Answer

A)   ADP
B)   ATP
C)   NAD+/NADH
D)   FAD/FADH2E) A) and B)
F) B) and D)

Question 7

Using glucose metabolism, justify the following statement: Metabolic pathways are highly interdependent and are exquisitely controlled by enzyme activity levels and substrate bioavailability.

Accepted Answer

Using the example from the textbook: Bef...

Question 8

Calculate the net  Δ\DeltaΔ G °\degree° '  for the following series of reactions: '  for the following series of reactions:   A)  14 kJ/mol B)  -6 kJ/mol C)  6 kJ/mol D)  0 kJ/mol " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   14 kJ/mol
B)   -6 kJ/mol
C)   6 kJ/mol
D)   0 kJ/mol E) A) and D)
F) A) and C)

Question 9

Which enzyme is the main regulator of glycolysis?

Accepted Answer

A)   hexokinase
B)   PFK-1
C)   pyruvate kinase
D)   aldolaseE) B) and D)
F) B) and C)

Question 10

In your own words explain why glycolysis is considered one of the core metabolic pathways in nature.

Accepted Answer

Glycolysis, or the flycolytic pathway, i...

Question 11

What is the fate of pyruvate in the presence of yeast, Saccharomyces cerevisiae?

Accepted Answer

A)   converts to CO2 and ethanol
B)   converts to H2O and CO2
C)   converts to lactate and ethanol
D)   converts to lactate and glucoseE) A) and B)
F) A) and C)

Question 12

If you are unable to digest milk products, what is the metabolic root of that issue?

Accepted Answer

A)   maltase
B)   lactase
C)   sucrose
D)   glucose oxidaseE) C) and D)
F) A) and D)

Question 13

What would the effect be of a lack of lactate dehydrogenase?

Accepted Answer

A)   buildup of glucose
B)   buildup of CO2
C)   deficiency of ATP
D)   deficiency of pyruvateE) All of the above
F) A) and D)

Question 14

Metabolism is best defined as a collection of

Accepted Answer

A)   biochemical reactions that convert chemical energy into work.
B)   biochemical reactions that convert mechanical energy into work.
C)   enzymes that convert glucose into carbon dioxide.
D)   enzymes that convert amino acids into proteins.E) A) and D)
F) A) and C)

Question 15

Illustrate how glyceraldehyde-3-P is converted into 1,3-bisphosphoglycerate by glyceraldehyde-3-P dehydrogenase using the appropriate mechanisms.

Accepted Answer

See Figure...

Question 16

List three common disaccharides in nature and draw the structures of each.

Accepted Answer

Lactose, s...

Question 17

If a person has a deficiency in fructose-1-P, what effects does that have on the body?

Accepted Answer

A)   Fructose-6-P concentrations increase.
B)   Fructose-6-P is depleted.
C)   ATP concentrations increase.
D)   Glucose-6-P concentrations increase.E) All of the above
F) B) and D)

Question 18

An infant who obtains nourishment from milk and who has galactosemia is unable to convert

Accepted Answer

A)   galactose-1-P to glucose-6-P.
B)   glucose-6-P to galactose-1-P.
C)   galactose-1-P to glucose-1-P.
D)   glucose-1-P to galactose-1-P.E) B) and D)
F) B) and C)

Question 19

List the major metabolic pathways in animals and classify each as either an energy conversion pathway or a synthesis/degradation pathway

Accepted Answer

Pentose phosphate pathway, gluconeogenes...

Question 20

The NADH that is produced by glycolysis under anaerobic conditions is regenerated to NAD+  by the conversion of

Accepted Answer

A)   acetaldehyde  →\rightarrow→   ethanol.
B)   lactate  →\rightarrow→   pyruvate.
C)   phosphoenolpyruvate  →\rightarrow→   pyruvate.
D)   pyruvate  →\rightarrow→   lactate. E) C) and D)
F) B) and C)

Exam 9: Glycolysis: a Paradigm of Metabolic Regulation

In the reaction A →\rightarrow→ B, if at equilibrium [B] >> [A], what can be said about the directionality of the reaction?

Correct AnswerverifiedShow Answer

Illustrate how glyceraldehyde-3-P is converted into 1,3-bisphosphoglycerate by glyceraldehyde-3-P dehydrogenase using the appropriate mechanisms.

Correct AnswerverifiedSee Figure...View AnswerShow Answer

Describe how molecules such as maltose can enter glycolysis.

Correct AnswerverifiedMaltose is cleaved by maltase ...View AnswerShow Answer

Which of these cofactors participates directly in MOST of the redox reactions in the fermentation of glucose to lactate?

Correct AnswerverifiedShow Answer

List the major metabolic pathways in animals and classify each as either an energy conversion pathway or a synthesis/degradation pathway

Correct AnswerverifiedPentose phosphate pathway, gluconeogenes...View AnswerShow Answer

An infant who obtains nourishment from milk and who has galactosemia is unable to convert

Correct AnswerverifiedShow Answer

If a person has a deficiency in fructose-1-P, what effects does that have on the body?

Correct AnswerverifiedShow Answer

List three common disaccharides in nature and draw the structures of each.

Correct AnswerverifiedLactose, s...View AnswerShow Answer

Which enzyme is the main regulator of glycolysis?

Correct AnswerverifiedShow Answer

In your own words explain why glycolysis is considered one of the core metabolic pathways in nature.

Correct AnswerverifiedGlycolysis, or the flycolytic pathway, i...View AnswerShow Answer

What would the effect be of a lack of lactate dehydrogenase?

Correct AnswerverifiedShow Answer

Using glucose metabolism, justify the following statement: Metabolic pathways are highly interdependent and are exquisitely controlled by enzyme activity levels and substrate bioavailability.

Correct AnswerverifiedUsing the example from the textbook: Bef...View AnswerShow Answer

If you are unable to digest milk products, what is the metabolic root of that issue?

Correct AnswerverifiedShow Answer

The NADH that is produced by glycolysis under anaerobic conditions is regenerated to NAD+ by the conversion of

Correct AnswerverifiedShow Answer

What is the fate of pyruvate in the presence of yeast, Saccharomyces cerevisiae?

Correct AnswerverifiedShow Answer

In which of the following metabolic conversions is ATP "consumed" during glycolysis?

Correct AnswerverifiedShow Answer

List the major metabolic pathways in plants and classify each as either an energy conversion pathway or a synthesis/degradation pathway.

Correct AnswerverifiedPentose phosphate pathway, gluconeogenes...View AnswerShow Answer

Metabolism is best defined as a collection of

Correct AnswerverifiedShow Answer

Calculate the net Δ\DeltaΔ G °\degree° ' for the following series of reactions:

Correct AnswerverifiedShow Answer

Which of the following is the correct formula for glucose?

Correct AnswerverifiedShow Answer

In the reaction A $\rightarrow$ B, if at equilibrium [B] >> [A], what can be said about the directionality of the reaction?

Correct Answer
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Correct Answer
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See Figure...
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Maltose is cleaved by maltase ...
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Correct Answer
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Pentose phosphate pathway, gluconeogenes...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Lactose, s...
View Answer

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Correct Answer
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Glycolysis, or the flycolytic pathway, i...
View Answer

Correct Answer
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Correct Answer
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Using the example from the textbook: Bef...
View Answer

Correct Answer
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The NADH that is produced by glycolysis under anaerobic conditions is regenerated to NAD⁺ by the conversion of

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Pentose phosphate pathway, gluconeogenes...
View Answer

Correct Answer
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Calculate the net $\Delta$ G $\degree$ ^' for the following series of reactions: $Calculate the net \Delta G \degree <sup>'</sup> <sup> </sup>for the following series of reactions: A) 14 kJ/mol B) -6 kJ/mol C) 6 kJ/mol D) 0 kJ/mol$

Correct Answer
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Correct Answer
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