Question 1

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 2

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 3

The fate of NADH from glycolysis depends on whether conditions are anaerobic or aerobic.

Accepted Answer

A) True 
 B)False

Question 4

Which enzyme catalyzes reaction the reaction shown?

Accepted Answer

A)  enolase 
B)  pyruvate dehydrogenase 
C)  pyruvate kinase 
D)  phosphoglycerate mutase 
A)  enolase 
B)  pyruvate dehydrogenase 
C)  pyruvate kinase 
D)  phosphoglycerate mutase

Question 5

The percentage of energy captured as ATP during the conversion of glucose to lactate is closest to

Accepted Answer

A)  10%. 
B)  30%. 
C)  50%. 
D)  75%. 
E)  90%. 
A)  10%. 
B)  30%. 
C)  50%. 
D)  75%. 
E)  90%.

Question 6

The reduction of pyruvate to lactate

Accepted Answer

A)  allows for recycling of NAD+. 
B)  is the process that aids in the recovery of sore muscles after exercise. 
C)  is accompanied by phosphorylation of ADP. 
D)  does not occur in aerobic organisms. 
A)  allows for recycling of NAD+. 
B)  is the process that aids in the recovery of sore muscles after exercise. 
C)  is accompanied by phosphorylation of ADP. 
D)  does not occur in aerobic organisms.

Question 7

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 8

Which of the following is true about phosphofructokinase?

Accepted Answer

A)  It is made of a single polypeptide chain 
B)  It is found in the muscle only 
C)  It is made up of four subunits, potentially of two different types 
D)  A person who lacks the M subunit does not have the glycolytic pathway 
A)  It is made of a single polypeptide chain 
B)  It is found in the muscle only 
C)  It is made up of four subunits, potentially of two different types 
D)  A person who lacks the M subunit does not have the glycolytic pathway

Question 9

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 10

When humans consume ethanol, the first step in its metabolism is:

Accepted Answer

A)  conversion to lactate 
B)  conversion to acetaldehyde 
C)  conversion to acetone 
D)  production of fat 
A)  conversion to lactate 
B)  conversion to acetaldehyde 
C)  conversion to acetone 
D)  production of fat

Question 11

Which of the following enzymes interconverts an aldose and a ketose?

Accepted Answer

A)  kinase 
B)  isomerase 
C)  mutase 
D)  dehydrogenase 
E)  phosphorylase 
A)  kinase 
B)  isomerase 
C)  mutase 
D)  dehydrogenase 
E)  phosphorylase

Question 12

Which of the following is not true?

Accepted Answer

A)  Every reaction in a metabolic pathway must have a negative Δ G, or the pathway cannot run. 
B)  the reaction with the largest negative Ä G is the hexokinase reaction 
C)  the overall pathway of glycolysis has a negative Ä G 
D)  all of these are true 
A)  Every reaction in a metabolic pathway must have a negative Δ G, or the pathway cannot run. 
B)  the reaction with the largest negative Ä G is the hexokinase reaction 
C)  the overall pathway of glycolysis has a negative Ä G 
D)  all of these are true

Question 13

What kind of 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 14

The phosphorylation of fructose 6-phosphate to fructose-1,6- bis phosphate is the committed step in glycolysis because

Accepted Answer

A)  it is the rate-limiting step. 
B)  it is the most strongly exergonic step in the pathway. 
C)  fructose 1,6- bis phosphate can undergo no other reactions than those of glycolysis. 
D)  two phosphate groups are involved. 
A)  it is the rate-limiting step. 
B)  it is the most strongly exergonic step in the pathway. 
C)  fructose 1,6- bis phosphate can undergo no other reactions than those of glycolysis. 
D)  two phosphate groups are involved.

Question 15

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 16

The nicotinamide-binding region in glyceraldehyde-3-phosphate dehydrogenase is similar to all other NAD binding domains.

Accepted Answer

A) True 
 B)False

Question 17

How many different reactions involve substrate-level phosphorylation 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 18

​ The enzyme _____ helps in the conversion of 3-phosphoglycerate to 2-phosphoglycerate  during glycolysis.

Accepted Answer

A)  indoleglycerol phosphate synthase 
B)  phosphoglyceromutase 
C)  phosphoglycerate kinase 
D)  glycerol diphosphatase 
A)  indoleglycerol phosphate synthase 
B)  phosphoglyceromutase 
C)  phosphoglycerate kinase 
D)  glycerol diphosphatase

Question 19

Thiamine pyrophosphate is a coenzyme

Accepted Answer

A)  frequently encountered in oxidation-reduction reactions. 
B)  required for the phosphorylation of ADP. 
C)  involved in transfers of two-carbon groups. 
D)  involved in transfers of one-carbon groups. 
A)  frequently encountered in oxidation-reduction reactions. 
B)  required for the phosphorylation of ADP. 
C)  involved in transfers of two-carbon groups. 
D)  involved in transfers of one-carbon groups.

Question 20

​ Which of the following statements is true of the glycolytic pathway?

Accepted Answer

A)  Each reaction in the glycolytic pathway is catalyzed by a single enzyme, acetyl CoA dehydrogenase. 
B)  In each reaction in the pathway, one molecule of ATP is hydrolyzed for each molecule of glucose that is metabolized. 
C)  In each reaction in the glycolytic pathway, two NADP molecules are released that make coupled exergonic reactions possible. 
D)  Each reaction has a net gain of three ATP molecules for each glucose molecule processed in glycolysis. 
A)  Each reaction in the glycolytic pathway is catalyzed by a single enzyme, acetyl CoA dehydrogenase. 
B)  In each reaction in the pathway, one molecule of ATP is hydrolyzed for each molecule of glucose that is metabolized. 
C)  In each reaction in the glycolytic pathway, two NADP molecules are released that make coupled exergonic reactions possible. 
D)  Each reaction has a net gain of three ATP molecules for each glucose molecule processed in glycolysis.

Exam 17: Glycolysis

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

The fate of NADH from glycolysis depends on whether conditions are anaerobic or aerobic.

Which enzyme catalyzes reaction the reaction shown?

The percentage of energy captured as ATP during the conversion of glucose to lactate is closest to

The reduction of pyruvate to lactate

What is the net ATP yield per glucose during glycolysis?

Which of the following is true about phosphofructokinase?

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

When humans consume ethanol, the first step in its metabolism is:

Which of the following enzymes interconverts an aldose and a ketose?

Which of the following is not true?

What kind of enzyme catalyzes the reaction shown?

The phosphorylation of fructose 6-phosphate to fructose-1,6- bis phosphate is the committed step in glycolysis because

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

The nicotinamide-binding region in glyceraldehyde-3-phosphate dehydrogenase is similar to all other NAD binding domains.

How many different reactions involve substrate-level phosphorylation during glycolysis?

​ The enzyme _____ helps in the conversion of 3-phosphoglycerate to 2-phosphoglycerate during glycolysis.

Thiamine pyrophosphate is a coenzyme

​ Which of the following statements is true of the glycolytic pathway?

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 the 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

Filters

The enzyme _____ helps in the conversion of 3-phosphoglycerate to 2-phosphoglycerate during glycolysis.

Which of the following statements is true of the glycolytic pathway?