Question 1

Which of the following enzymes of glycolysis is not involved in regulation of the pathway?

Accepted Answer

A)  Hexokinase 
B)  Phosphofructokinase 
C)  Aldolase 
D)  Pyruvate kinase 
E)  All of these proteins regulate glycolysis. 
A)  Hexokinase 
B)  Phosphofructokinase 
C)  Aldolase 
D)  Pyruvate kinase 
E)  All of these proteins regulate glycolysis.

Question 2

In humans,pyruvate can be converted to

Accepted Answer

A)  acetyl-CoA only. 
B)  lactate only. 
C)  ethanol only. 
D)  acetyl-CoA and lactate. 
A)  acetyl-CoA only. 
B)  lactate only. 
C)  ethanol only. 
D)  acetyl-CoA and lactate.

Question 3

Consider the following information:   How many molecules of ATP might theoretically have been produced when coupled to the conversion of one molecule phosphoenolpyruvate to pyruvate?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

What is the name of the pictured glycolytic intermediate?

Accepted Answer

A)  1-phosphoglycerate 
B)  glyceraldehyde-3-phosphate 
C)  dihydroxyacetone phosphate 
D)  3-phosphoglycerate 
A)  1-phosphoglycerate 
B)  glyceraldehyde-3-phosphate 
C)  dihydroxyacetone phosphate 
D)  3-phosphoglycerate

Question 5

The amino acid cysteine is important in adding a second phosphate to glyceraldehyde phosphate in the glyceraldehyde-3-phosphate dehydrogenase reaction.

Accepted Answer

A) True 
 B)False

Question 6

Fetal alcohol syndrome

Accepted Answer

A)  can be prevented by administering large doses of vitamin B1 to pregnant women 
B)  can be prevented by administering large doses of the vitamin niacin (nicotinic acid) to pregnant women 
C)  can be reversed by administering acetaldehyde 
D)  can be detected by measuring the level of acetaldehyde in the bloodstream of a pregnant woman 
A)  can be prevented by administering large doses of vitamin B1 to pregnant women 
B)  can be prevented by administering large doses of the vitamin niacin (nicotinic acid) to pregnant women 
C)  can be reversed by administering acetaldehyde 
D)  can be detected by measuring the level of acetaldehyde in the bloodstream of a pregnant woman

Question 7

Which of the following exercise(s) allosteric control in the reaction of phosphofructokinase?

Accepted Answer

A)  ATP 
B)  fructose 2,6-bisphosphate 
C)  both of these 
D)  neither of these 
A)  ATP 
B)  fructose 2,6-bisphosphate 
C)  both of these 
D)  neither of these

Question 8

In the conversion of glucose to pyruvate,how many of the actual steps involve electron transfer?

Accepted Answer

A)  none 
B)  1 
C)  2 
D)  3 
E)  4 
A)  none 
B)  1 
C)  2 
D)  3 
E)  4

Question 9

During anaerobic metabolism in yeast,the carbons of glucose end up in

Accepted Answer

A)  CO2. 
B)  ethanol. 
C)  lactic acid. 
D)  both CO2 and ethanol. 
E)  all of these 
A)  CO2. 
B)  ethanol. 
C)  lactic acid. 
D)  both CO2 and ethanol. 
E)  all of these

Question 10

In glycolysis,ATP is synthesized by

Accepted Answer

A)  substrate-level phosphorylation. 
B)  oxidative phosphorylation. 
C)  photophosphorylation. 
D)  both substrate-level and oxidative phosphorylation. 
E)  all three of the above methods. 
A)  substrate-level phosphorylation. 
B)  oxidative phosphorylation. 
C)  photophosphorylation. 
D)  both substrate-level and oxidative phosphorylation. 
E)  all three of the above methods.

Question 11

The reactions where glucose is converted to glucose 6-phosphate and fructose 6-phosphate is converted to fructose 1,5-bisphosphate are examples of:

Accepted Answer

A)  exergonic reactions 
B)  priming reactions 
C)  phosphorylation reactions 
D)  kinase reactions 
E)  all of these 
A)  exergonic reactions 
B)  priming reactions 
C)  phosphorylation reactions 
D)  kinase reactions 
E)  all of these

Question 12

Which enzyme is the key regulatory enzyme in glycolysis?

Accepted Answer

A)  Glyceraldehyde-3-phosphate dehydrogenase 
B)  Enolase 
C)  Phosphofructokinase 
D)  Aldolase 
A)  Glyceraldehyde-3-phosphate dehydrogenase 
B)  Enolase 
C)  Phosphofructokinase 
D)  Aldolase

Question 13

Which of the following is required for substrate-level phosphorylation?

Accepted Answer

A)  The substrate must contain multiple phosphate groups. 
B)  Molecular oxygen must present. 
C)  The standard free energy of the hydrolysis reaction is more negative than that for hydrolysis of the new phosphate compound being formed. 
D)  All of the above are necessary for substrate-level phosphorylation. 
A)  The substrate must contain multiple phosphate groups. 
B)  Molecular oxygen must present. 
C)  The standard free energy of the hydrolysis reaction is more negative than that for hydrolysis of the new phosphate compound being formed. 
D)  All of the above are necessary for substrate-level phosphorylation.

Question 14

Which of the following sugars can be a substrate for hexokinase?

Accepted Answer

A)  glucose 
B)  fructose 
C)  mannose 
D)  all of these 
E)  none of these 
A)  glucose 
B)  fructose 
C)  mannose 
D)  all of these 
E)  none of these

Question 15

Which of the following enzymes catalyzes the cleavage of fructose bisphosphate into two 3-carbon units?

Accepted Answer

A)  Aldolase 
B)  Enolase 
C)  An isomerase 
D)  A mutase 
E)  None of these enzymes carries out that reaction. 
A)  Aldolase 
B)  Enolase 
C)  An isomerase 
D)  A mutase 
E)  None of these enzymes carries out that reaction.

Question 16

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 17

During anaerobic metabolism in red blood cells,the carbons of glucose end up in

Accepted Answer

A)  CO2. 
B)  ethanol. 
C)  lactic acid. 
D)  both CO2 and ethanol. 
E)  all of the above. 
A)  CO2. 
B)  ethanol. 
C)  lactic acid. 
D)  both CO2 and ethanol. 
E)  all of the above.

Question 18

What is the net ATP yield per glucose during glycolysis?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  6 
A)  1 
B)  2 
C)  3 
D)  4 
E)  6

Question 19

Which of the following terms describes an enzyme that catalyzes electron transfer reactions?

Accepted Answer

A)  dehydrogenase 
B)  isomerase 
C)  kinase 
D)  phosphatase 
A)  dehydrogenase 
B)  isomerase 
C)  kinase 
D)  phosphatase

Question 20

If glycolysis did not lead to the production of ATP,the overall process would

Accepted Answer

A)  release less energy 
B)  release more energy 
C)  absorb energy 
D)  not take place in aerobic organisms 
A)  release less energy 
B)  release more energy 
C)  absorb energy 
D)  not take place in aerobic organisms

Exam 17: Glycolysis

Which of the following enzymes of glycolysis is not involved in regulation of the pathway?

In humans,pyruvate can be converted to

Consider the following information: How many molecules of ATP might theoretically have been produced when coupled to the conversion of one molecule phosphoenolpyruvate to pyruvate?

What is the name of the pictured glycolytic intermediate?

The amino acid cysteine is important in adding a second phosphate to glyceraldehyde phosphate in the glyceraldehyde-3-phosphate dehydrogenase reaction.

Fetal alcohol syndrome

Which of the following exercise(s) allosteric control in the reaction of phosphofructokinase?

In the conversion of glucose to pyruvate,how many of the actual steps involve electron transfer?

During anaerobic metabolism in yeast,the carbons of glucose end up in

In glycolysis,ATP is synthesized by

The reactions where glucose is converted to glucose 6-phosphate and fructose 6-phosphate is converted to fructose 1,5-bisphosphate are examples of:

Which enzyme is the key regulatory enzyme in glycolysis?

Which of the following is required for substrate-level phosphorylation?

Which of the following sugars can be a substrate for hexokinase?

Which of the following enzymes catalyzes the cleavage of fructose bisphosphate into two 3-carbon units?

Which enzyme catalyzes the reaction shown?

During anaerobic metabolism in red blood cells,the carbons of glucose end up in

What is the net ATP yield per glucose during glycolysis?

Which of the following terms describes an enzyme that catalyzes electron transfer reactions?

If glycolysis did not lead to the production of ATP,the overall process would

Biochemistry and the Organization of Cells

Water: The Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three-Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins: Enzymes

The Behavior of Proteins: Enzymes, Mechanisms, and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids: How Structure Conveys Information

Biosynthesis of Nucleic Acids: Replication

Transcription of the Genetic Code: Biosynthesis of Rna

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism: Cellular Signaling

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