Question 1

Coupled reactions are pairs of reactions that occur together so that the energy released by one reaction provides the energy to drive the other reaction.

Accepted Answer

A) True 
 B)False

Question 2

By the end of step [4] of the citric acid cycle,________ carbons are lost as CO2 and ________ molecules of NADH are formed.

Accepted Answer

Question 3

The main function of the citric acid cycle is to produce ________ that enter the electron transport chain and ultimately produce ________.

Accepted Answer

reduced co

Question 4

How many molecules of GTP are produced for each turn of the citric acid cycle?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 8 
A) 1 
B) 2 
C) 4 
D) 8

Question 5

Which is the sum of all of the chemical reactions that take place in an organism?

Accepted Answer

A) Anabolism 
B) Metabolism 
C) Catabolism 
D) Citric acid cycle 
A) Anabolism 
B) Metabolism 
C) Catabolism 
D) Citric acid cycle

Question 6

The energy produced by the citric acid cycle is stored in the bonds of a nucleoside triphosphate and reduced coenzymes.

Accepted Answer

A) True 
 B)False

Question 7

Any energy requiring reaction can be coupled with ATP hydrolysis to create an energetically favorable coupled reaction.

Accepted Answer

A) True 
 B)False

Question 8

Which is the enzyme that hydrolyzes triacylglycerols?

Accepted Answer

A) Acetyl CoA 
B) Protease pepsin 
C) Amylase 
D) Lipase 
A) Acetyl CoA 
B) Protease pepsin 
C) Amylase 
D) Lipase

Question 9

The phosphorylation of glucose provides enough energy for the hydrolysis of ATP.

Accepted Answer

A) True 
 B)False

Question 10

The reaction shown below requires the overall input of energy.

Accepted Answer

A) True 
 B)False

Question 11

Considering the energy changes associated with the individual reactions below,which reaction can be coupled with the hydrolysis of ATP to generate a coupled reaction that is energetically favorable?

Accepted Answer

A) Fructose 6-phosphate + HPO42-   fructose 1,6-bisphosphate + H2O 
B) Succinate + HSCoA + HPO42-   succinyl CoA + H2O 
C) 3-phosphoglycerate + HPO42-   1,3-bisphosphoglycerate + H2O 
D) All of the reactions can be coupled with the hydrolysis of ATP to generate a coupled reaction that is energetically favorable. 
A) Fructose 6-phosphate + HPO42-   fructose 1,6-bisphosphate + H2O 
B) Succinate + HSCoA + HPO42-   succinyl CoA + H2O 
C) 3-phosphoglycerate + HPO42-   1,3-bisphosphoglycerate + H2O 
D) All of the reactions can be coupled with the hydrolysis of ATP to generate a coupled reaction that is energetically favorable.

Question 12

How much ATP is generated for each acetyl CoA during stages [3] and [4] of catabolism?

Accepted Answer

A) 4 molecules of ATP 
B) 5 molecules of ATP 
C) 8 molecules of ATP 
D) 10 molecules of ATP 
E) 16 molecules of ATP 
A) 4 molecules of ATP 
B) 5 molecules of ATP 
C) 8 molecules of ATP 
D) 10 molecules of ATP 
E) 16 molecules of ATP

Question 13

Which statement concerning the digestion of food groups is incorrect?

Accepted Answer

A) Carbohydrates are ultimately broken down to glucose and other monosaccharides. 
B) Triacylglycerols are ultimately broken down by lipases into glycerol and fatty acids. 
C) Proteins are ultimately broken down by proteases into amino acids. 
D) Polysaccharides are ultimately broken down to nucleotides. 
A) Carbohydrates are ultimately broken down to glucose and other monosaccharides. 
B) Triacylglycerols are ultimately broken down by lipases into glycerol and fatty acids. 
C) Proteins are ultimately broken down by proteases into amino acids. 
D) Polysaccharides are ultimately broken down to nucleotides.

Question 14

Which is the first stage of catabolism?

Accepted Answer

A) Digestion 
B) Citric acid cycle 
C) Fatty acid oxidation 
D) Glycolysis 
E) Formation of acetyl CoA 
A) Digestion 
B) Citric acid cycle 
C) Fatty acid oxidation 
D) Glycolysis 
E) Formation of acetyl CoA

Question 15

The second step of the citric acid cycle,the isomerization of citrate to isocitrate,is shown. What is the structure of isocitrate?

Accepted Answer

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

Question 16

Which coupled reaction properly indicates the role of the coenzyme as an oxidizing agent?

Accepted Answer

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

Question 17

Within the cell,energy production occurs in the matrix of the mitochondrion.

Accepted Answer

A) True 
 B)False

Question 18

Considering the energy changes associated with the two individual reactions below,what coupled reaction is an energetically favorable one?

Accepted Answer

A) Fructose 1,6-bisphosphate + H2O   fructose 6-phosphate + HPO42- 
B) ADP + fructose 1,6-bisphosphate   ATP + fructose 6-phosphate 
C) ATP + H2O   ADP + HPO42- 
D) ADP + fructose 6-phosphate   ATP + fructose 1,6-bisphosphate 
E) ATP + fructose 6-phosphate   ADP + fructose 1,6-bisphosphate 
A) Fructose 1,6-bisphosphate + H2O   fructose 6-phosphate + HPO42- 
B) ADP + fructose 1,6-bisphosphate   ATP + fructose 6-phosphate 
C) ATP + H2O   ADP + HPO42- 
D) ADP + fructose 6-phosphate   ATP + fructose 1,6-bisphosphate 
E) ATP + fructose 6-phosphate   ADP + fructose 1,6-bisphosphate

Question 19

Coenzyme A is synthesized in cells from pantothenic acid,vitamin B5.

Accepted Answer

A) True 
 B)False

Question 20

In the electron transport chain,H+ ions are pumped across the inner membrane of the mitochondrion,forming a high concentration of H+ ions in the intermembrane space,thus creating a potential energy gradient.

Accepted Answer

A) True 
 B)False

Exam 23: Metabolism and Energy Production

Coupled reactions are pairs of reactions that occur together so that the energy released by one reaction provides the energy to drive the other reaction.

By the end of step [4] of the citric acid cycle,________ carbons are lost as CO2 and ________ molecules of NADH are formed.

The main function of the citric acid cycle is to produce ________ that enter the electron transport chain and ultimately produce ________.

How many molecules of GTP are produced for each turn of the citric acid cycle?

Which is the sum of all of the chemical reactions that take place in an organism?

The energy produced by the citric acid cycle is stored in the bonds of a nucleoside triphosphate and reduced coenzymes.

Any energy requiring reaction can be coupled with ATP hydrolysis to create an energetically favorable coupled reaction.

Which is the enzyme that hydrolyzes triacylglycerols?

The phosphorylation of glucose provides enough energy for the hydrolysis of ATP.

The reaction shown below requires the overall input of energy.

Considering the energy changes associated with the individual reactions below,which reaction can be coupled with the hydrolysis of ATP to generate a coupled reaction that is energetically favorable?

How much ATP is generated for each acetyl CoA during stages [3] and [4] of catabolism?

Which statement concerning the digestion of food groups is incorrect?

Which is the first stage of catabolism?

The second step of the citric acid cycle,the isomerization of citrate to isocitrate,is shown. What is the structure of isocitrate?

Which coupled reaction properly indicates the role of the coenzyme as an oxidizing agent?

Within the cell,energy production occurs in the matrix of the mitochondrion.

Considering the energy changes associated with the two individual reactions below,what coupled reaction is an energetically favorable one?

Coenzyme A is synthesized in cells from pantothenic acid,vitamin B5.

In the electron transport chain,H+ ions are pumped across the inner membrane of the mitochondrion,forming a high concentration of H+ ions in the intermembrane space,thus creating a potential energy gradient.

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Carbohydrate,lipid,and Protein Metabolism

Filters

By the end of step [4] of the citric acid cycle, carbons are lost as CO₂ and molecules of NADH are formed.

The main function of the citric acid cycle is to produce that enter the electron transport chain and ultimately produce .

Coenzyme A is synthesized in cells from pantothenic acid,vitamin B₅.

In the electron transport chain,H⁺ ions are pumped across the inner membrane of the mitochondrion,forming a high concentration of H⁺ ions in the intermembrane space,thus creating a potential energy gradient.