Question 1

All pyruvate has a similar fate, in that it eventually produces _____ .

Accepted Answer

A) CO2 
B) acetyl CoA 
C) NAD+ 
D) FAD 
A) CO2 
B) acetyl CoA 
C) NAD+ 
D) FAD

Question 2

Which of the following is not considered a component of the electron transport chain?

Accepted Answer

A) cytochrome c (cyt c) 
B) coenzyme Q (CoQ) 
C) Fe-S protein (Fe-S) 
D) adenosine diphosphate (ADP) 
A) cytochrome c (cyt c) 
B) coenzyme Q (CoQ) 
C) Fe-S protein (Fe-S) 
D) adenosine diphosphate (ADP)

Question 3

Under anaerobic conditions in humans, what is pyruvate converted to?

Accepted Answer

A) ethanol 
B) lactate 
C) CO2 
D) none of these 
A) ethanol 
B) lactate 
C) CO2 
D) none of these

Question 4

The free energy change for the complete oxidation of one mole of glucose is -686 kcal and Δ G°' for the hydrolysis of ATP is -7.3 kcal\mol.   How many moles of ATP could be synthesized if the entire oxidation process were 100% efficient in converting this energy to the production of ATP?

Accepted Answer

A) 0.0106  mol ATP 
B) 94.0 mol ATP 
C) 5.01 × 103 mol ATP 
D) 32.0 mol ATP 
A) 0.0106  mol ATP 
B) 94.0 mol ATP 
C) 5.01 × 103 mol ATP 
D) 32.0 mol ATP

Question 5

The high-energy compound involved in the conversion of glucose to glycogen is _____ .

Accepted Answer

A) GTP 
B) ATP 
C) ADP 
D) UTP 
A) GTP 
B) ATP 
C) ADP 
D) UTP

Question 6

Contrast complete glucose oxidation, lactate fermentation, and alcoholic fermentation.

Accepted Answer

A) Glucose oxidation produces approximately the same amount of ATP as lactate and alcoholic fermentation together. 
B) Lactate fermentation is the most important process of the three for the production of energy in muscles that are performing extended periods of work. 
C) Lactate fermentation produces less ATP than does glucose oxidation, but approximately the same amount of ATP as alcoholic fermentation. 
D) The complete oxidation of glucose produces fructose; that of lactate fermentation produces lactic acid; and that of alcoholic fermentation produces ethanol. 
A) Glucose oxidation produces approximately the same amount of ATP as lactate and alcoholic fermentation together. 
B) Lactate fermentation is the most important process of the three for the production of energy in muscles that are performing extended periods of work. 
C) Lactate fermentation produces less ATP than does glucose oxidation, but approximately the same amount of ATP as alcoholic fermentation. 
D) The complete oxidation of glucose produces fructose; that of lactate fermentation produces lactic acid; and that of alcoholic fermentation produces ethanol.

Question 7

A condition in which glucose appears in the urine is called _____ .

Accepted Answer

A) hypoglycemia 
B) hyperglycemia 
C) glucosuria 
D) galactosemia 
A) hypoglycemia 
B) hyperglycemia 
C) glucosuria 
D) galactosemia

Question 8

The catabolism of one molecule of glucose in the muscle cells produces 32 ATP molecules.

Accepted Answer

A) True 
 B)False

Question 9

The major products of carbohydrate digestion are _____ .

Accepted Answer

A) monosaccharides 
B) monosaccharides & disaccharides 
C) acetyl CoA 
D) pyruvic acid 
A) monosaccharides 
B) monosaccharides & disaccharides 
C) acetyl CoA 
D) pyruvic acid

Question 10

The net yield of ATP molecules from the complete catabolism of one molecule of glucose is _____ .

Accepted Answer

A) 18 
B) 24 
C) 32 
D) 42 
A) 18 
B) 24 
C) 32 
D) 42

Question 11

Glucose-6-phosphate is best represented by which of the following?  (Note: the wavy bond indicates that the -OH could either be up or down.)

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 12

During gluconeogenesis, pyruvate is formed from glycerol, certain amino acids and _____ .

Accepted Answer

A) acetyl CoA 
B) glucose 
C) lactate 
D) glycogen 
A) acetyl CoA 
B) glucose 
C) lactate 
D) glycogen

Question 13

Which of the following enzymes catalyzes the conversion of glucose to glucose-6-phosphate and therefore initiates the glycolysis pathway? ​

Accepted Answer

A) Pepsin 
B) Kinase 
C) Arginase 
D) Hexokinase 
A) Pepsin 
B) Kinase 
C) Arginase 
D) Hexokinase

Question 14

A key organ in regulating blood glucose levels is the _____ .

Accepted Answer

A) heart 
B) liver 
C) adrenal cortex 
D) thyroid 
A) heart 
B) liver 
C) adrenal cortex 
D) thyroid

Question 15

Lactate, produced in the muscles, is sent to the liver for processing. This is one step of ____.

Accepted Answer

A) the citric acid cycle 
B) the Cori cycle 
C) glycolysis 
D) oxidative phosphorylation 
A) the citric acid cycle 
B) the Cori cycle 
C) glycolysis 
D) oxidative phosphorylation

Question 16

What is the final acceptor of electrons during electron transport?

Accepted Answer

A) NAD+ 
B) NADH 
C) FAD 
D) O2 
A) NAD+ 
B) NADH 
C) FAD 
D) O2

Question 17

Which of the following can be used to fuel the glycolysis pathway?

Accepted Answer

A) glucose 
B) glucose and fructose 
C) fructose and galactose 
D) glucose, fructose and galactose 
A) glucose 
B) glucose and fructose 
C) fructose and galactose 
D) glucose, fructose and galactose

Question 18

The main source of energy for the brain is _____ .

Accepted Answer

A) glucose 
B) fatty acids 
C) glycogen 
D) glycerol 
A) glucose 
B) fatty acids 
C) glycogen 
D) glycerol

Question 19

The function of glycolysis is to extract energy from the glucose molecule.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is a product of glycolysis?

Accepted Answer

A) pyruvate 
B) CO2 + H2O 
C) lactate 
D) acetyl CoA 
A) pyruvate 
B) CO2 + H2O 
C) lactate 
D) acetyl CoA

Exam 23: Carbohydrate Metabolism

All pyruvate has a similar fate, in that it eventually produces _____ .

Which of the following is not considered a component of the electron transport chain?

Under anaerobic conditions in humans, what is pyruvate converted to?

The free energy change for the complete oxidation of one mole of glucose is -686 kcal and Δ G°' for the hydrolysis of ATP is -7.3 kcal\mol. How many moles of ATP could be synthesized if the entire oxidation process were 100% efficient in converting this energy to the production of ATP?

The high-energy compound involved in the conversion of glucose to glycogen is _____ .

Contrast complete glucose oxidation, lactate fermentation, and alcoholic fermentation.

A condition in which glucose appears in the urine is called _____ .

The catabolism of one molecule of glucose in the muscle cells produces 32 ATP molecules.

The major products of carbohydrate digestion are _____ .

The net yield of ATP molecules from the complete catabolism of one molecule of glucose is _____ .

Glucose-6-phosphate is best represented by which of the following? (Note: the wavy bond indicates that the -OH could either be up or down.)

During gluconeogenesis, pyruvate is formed from glycerol, certain amino acids and _____ .

Which of the following enzymes catalyzes the conversion of glucose to glucose-6-phosphate and therefore initiates the glycolysis pathway? ​

A key organ in regulating blood glucose levels is the _____ .

Lactate, produced in the muscles, is sent to the liver for processing. This is one step of ____.

What is the final acceptor of electrons during electron transport?

Which of the following can be used to fuel the glycolysis pathway?

The main source of energy for the brain is _____ .

The function of glycolysis is to extract energy from the glucose molecule.

Which of the following is a product of glycolysis?

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Which of the following enzymes catalyzes the conversion of glucose to glucose-6-phosphate and therefore initiates the glycolysis pathway?