Question 1

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 2

How many molecules of CO2 are produced per molecule of glucose as a result of the pyruvate dehydrogenase complex?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Question 3

Glycogenolysis does not occur in muscle tissue because of the absence of the enzyme _____ .

Accepted Answer

A) glucose 6-phosphatase 
B) glycogen phosphorylase 
C) phosphoglucomutase 
D) pyruvate kinase 
A) glucose 6-phosphatase 
B) glycogen phosphorylase 
C) phosphoglucomutase 
D) pyruvate kinase

Question 4

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 5

The free energy change for the complete oxidation of one mole of glucose is -686 kcal and $\Delta$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 6

Approximately ____ percent of the energy available in glucose catabolism is trapped in the formation of ATP.

Accepted Answer

A) 20 
B) 40 
C) 60 
D) 80 
A) 20 
B) 40 
C) 60 
D) 80

Question 7

All of the members of the citric acid cycle are acids.

Accepted Answer

A) True 
 B)False

Question 8

Insulin is a regulatory enzyme.

Accepted Answer

A) True 
 B)False

Question 9

Glycogen breakdown is increased in muscle tissue by the presence of epinephrine.

Accepted Answer

A) True 
 B)False

Question 10

The following represents overall net equation for the citric acid cycle.
acetyl CoA + 3NAD+ + FAD + GDP + Pi + 2H2O
$\smile$
2CO2 + CoA-S-H + 3NADH + 2H+ + FADH2 + GTP

Accepted Answer

A) True 
 B)False

Question 11

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 12

The citric acid cycle (CAC)is also called the tricarboxylic acid (TCA)cycle and the Krebs cycle.

Accepted Answer

A) True 
 B)False

Question 13

Lactose intolerance

Accepted Answer

A) can only be controlled by eliminating dairy products. 
B) produces symptoms including bloating and diarrhea. 
C) is due to a missing enzyme by approximately 20% of adults in the USA. 
D) All of these responses are correct. 
A) can only be controlled by eliminating dairy products. 
B) produces symptoms including bloating and diarrhea. 
C) is due to a missing enzyme by approximately 20% of adults in the USA. 
D) All of these responses are correct.

Question 14

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 15

During glycolysis the action of hexokinase is controlled by the concentration of glucose-6-phosphate.The first steps of glycolysis are shown below.   This is an example of feedback inhibition.

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

Epinephrine stimulates glycolysis.

Accepted Answer

A) True 
 B)False

Question 18

The bulk of the energy utilized by marathon runners is provided by _____ .

Accepted Answer

A) blood glucose 
B) glycogen 
C) protein 
D) fatty acids 
A) blood glucose 
B) glycogen 
C) protein 
D) fatty acids

Question 19

The electrons and hydrogen ions carried from the citric acid cycle by FADH2 and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 23: Carbohydrate Metabolism

The major products of carbohydrate digestion are _____ .

How many molecules of CO2 are produced per molecule of glucose as a result of the pyruvate dehydrogenase complex?

Glycogenolysis does not occur in muscle tissue because of the absence of the enzyme _____ .

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

The free energy change for the complete oxidation of one mole of glucose is -686 kcal and Δ\DeltaΔ 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?

Approximately ____ percent of the energy available in glucose catabolism is trapped in the formation of ATP.

All of the members of the citric acid cycle are acids.

Insulin is a regulatory enzyme.

Glycogen breakdown is increased in muscle tissue by the presence of epinephrine.

The following represents overall net equation for the citric acid cycle. acetyl CoA + 3NAD+ + FAD + GDP + Pi + 2H2O ⌣\smile⌣ 2CO2 + CoA-S-H + 3NADH + 2H+ + FADH2 + GTP

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

The citric acid cycle (CAC)is also called the tricarboxylic acid (TCA)cycle and the Krebs cycle.

Lactose intolerance

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 glycolysis the action of hexokinase is controlled by the concentration of glucose-6-phosphate.The first steps of glycolysis are shown below. This is an example of feedback inhibition.

Which of the following is a product of glycolysis?

Epinephrine stimulates glycolysis.

The bulk of the energy utilized by marathon runners is provided by _____ .

The electrons and hydrogen ions carried from the citric acid cycle by FADH2 and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.

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

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Lipid and Amino Acid Metabolism

Body Fluids

Filters

How many molecules of CO₂ are produced per molecule of glucose as a result of the pyruvate dehydrogenase complex?

The free energy change for the complete oxidation of one mole of glucose is -686 kcal and $\Delta$ 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 following represents overall net equation for the citric acid cycle. acetyl CoA + 3NAD⁺ + FAD + GDP + P_i + 2H₂O $\smile$ 2CO₂ + CoA-S-H + 3NADH + 2H⁺ + FADH₂ + GTP

The electrons and hydrogen ions carried from the citric acid cycle by FADH₂ and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.