Question 1

How would this diagram be different if the reaction was exothermic?

Accepted Answer

A)  III would be lower than I 
B)  No difference; this reaction is already exothermic. 
C)  II would be lower than III. 
D)  II would be lower, between I and III. 
E)  II would be lower than I. 
A)  III would be lower than I 
B)  No difference; this reaction is already exothermic. 
C)  II would be lower than III. 
D)  II would be lower, between I and III. 
E)  II would be lower than I.

Question 2

Which part of the following energy diagram is changed when a catalyst is added, and how is it changed?

Accepted Answer

A)  I is higher. 
B)  II is higher. 
C)  III is higher. 
D)  I is lower. 
E)  II is lower. 
A)  I is higher. 
B)  II is higher. 
C)  III is higher. 
D)  I is lower. 
E)  II is lower.

Question 3

A reaction occurs between the large black spheres and the small grey spheres.Each of the boxes below represents different reaction conditions for that reaction.Which box contains the reaction conditions that leads to the fastest reaction?

Accepted Answer

A)  diagram a 
B)  diagram b 
C)  diagram c 
D)  diagram d 
E)  diagram e 
A)  diagram a 
B)  diagram b 
C)  diagram c 
D)  diagram d 
E)  diagram e

Question 4

Which of the following processes are anabolic?

Accepted Answer

A)  muscle building as a result of steroid use 
B)  releasing energy from food during the citric acid cycle 
C)  weight loss as a result of burning fat 
D)  transferring bond energy from food to ATP 
E)  All of the above are anabolic processes. 
A)  muscle building as a result of steroid use 
B)  releasing energy from food during the citric acid cycle 
C)  weight loss as a result of burning fat 
D)  transferring bond energy from food to ATP 
E)  All of the above are anabolic processes.

Question 5

How is the reaction that occurs in a calorimeter different from human metabolism?

Accepted Answer

A)  One is a combustion reaction, and the other is not. 
B)  One occurs in many steps, and the other does not. 
C)  One is exothermic, and the other is endothermic. 
D)  One releases carbon dioxide, and the other does not. 
E)  These reactions are exactly the same. 
A)  One is a combustion reaction, and the other is not. 
B)  One occurs in many steps, and the other does not. 
C)  One is exothermic, and the other is endothermic. 
D)  One releases carbon dioxide, and the other does not. 
E)  These reactions are exactly the same.

Question 6

Bond breaking is always endothermic and yet catabolism, the breakdown of nutrients, is an overall exothermic process.How can you reconcile these two statements?

Accepted Answer

A)  Catabolism is an exception to the rule. 
B)  Bond breaking is not really always endothermic. 
C)  Endothermic bond breaking is only seen in the laboratory. 
D)  No one really understands this. 
E)  Catabolism is the sum of many reactions, including many bond-making reactions. 
A)  Catabolism is an exception to the rule. 
B)  Bond breaking is not really always endothermic. 
C)  Endothermic bond breaking is only seen in the laboratory. 
D)  No one really understands this. 
E)  Catabolism is the sum of many reactions, including many bond-making reactions.

Question 7

Which of the following statements describe how oxygen intake relates to caloric requirements? I.Oxygen reacts with food to produce energy.
II)The larger the oxygen intake, the higher the energy output.
III)Oxygen is a product of food metabolism.

Accepted Answer

A)  All of these statements describe the relationship between oxygen intake and caloric requirements. 
B)  I and II describe the relationship between oxygen intake and caloric requirements. 
C)  II and III describe the relationship between oxygen intake and caloric requirements. 
D)  I and III describe the relationship between oxygen intake and caloric requirements. 
E)  Only II describes the relationship between oxygen intake and caloric requirements. 
A)  All of these statements describe the relationship between oxygen intake and caloric requirements. 
B)  I and II describe the relationship between oxygen intake and caloric requirements. 
C)  II and III describe the relationship between oxygen intake and caloric requirements. 
D)  I and III describe the relationship between oxygen intake and caloric requirements. 
E)  Only II describes the relationship between oxygen intake and caloric requirements.

Question 8

Which statement best describes the relationship between the heat of reaction and reaction rate?

Accepted Answer

A)  There is no readily predictable relationship between ΔH and reaction rate. 
B)  Exothermic reactions are always slow. 
C)  Endothermic reactions are always slow. 
D)  The heat of reaction is always larger than reaction rate. 
E)  The relationship depends on whether the reaction is endothermic or exothermic. 
A)  There is no readily predictable relationship between ΔH and reaction rate. 
B)  Exothermic reactions are always slow. 
C)  Endothermic reactions are always slow. 
D)  The heat of reaction is always larger than reaction rate. 
E)  The relationship depends on whether the reaction is endothermic or exothermic.

Question 9

A spirometer is used in indirect calorimetry.What does a spirometer measure?

Accepted Answer

A)  oxygen 
B)  carbon dioxide 
C)  exhaled water 
D)  body heat 
E)  food intake 
A)  oxygen 
B)  carbon dioxide 
C)  exhaled water 
D)  body heat 
E)  food intake

Question 10

The reaction between acetic acid (CH3COOH)and methanol (CH3OH)is at equilibrium.Select the change that would result in a shift to the right. CH3COOH + CH3OH ⇌ CH3COOCH3 + H2O

Accepted Answer

A)  adding more CH3COOH 
B)  adding more H2O 
C)  adding more CH3COOCH3 
D)  removing CH3OH 
E)  Both B and C are correct. 
A)  adding more CH3COOH 
B)  adding more H2O 
C)  adding more CH3COOCH3 
D)  removing CH3OH 
E)  Both B and C are correct.

Question 11

Which statement describes reaction rate?

Accepted Answer

A)  Reaction rate is how fast a reaction proceeds. 
B)  Reaction rate is measured by the disappearance of reactants over time. 
C)  Reaction rate is measured by the appearance of products formed over time. 
D)  Reaction rate is determined, in part, by activation energy. 
E)  All of the above statements describe reaction rate. 
A)  Reaction rate is how fast a reaction proceeds. 
B)  Reaction rate is measured by the disappearance of reactants over time. 
C)  Reaction rate is measured by the appearance of products formed over time. 
D)  Reaction rate is determined, in part, by activation energy. 
E)  All of the above statements describe reaction rate.

Question 12

An exothermic reaction is one that:

Accepted Answer

A)  has a positive ΔH. 
B)  has no ΔH. 
C)  absorbs heat. 
D)  has products higher in energy than reactants. 
E)  has a negative ΔH. 
A)  has a positive ΔH. 
B)  has no ΔH. 
C)  absorbs heat. 
D)  has products higher in energy than reactants. 
E)  has a negative ΔH.

Question 13

The ΔH for the reaction described by the energy diagram below is

Accepted Answer

A)  very large. 
B)  greater than zero but not necessarily very large. 
C)  exactly zero. 
D)  less than zero. 
E)  It is not possible to predict anything about the ΔH of this equation. 
A)  very large. 
B)  greater than zero but not necessarily very large. 
C)  exactly zero. 
D)  less than zero. 
E)  It is not possible to predict anything about the ΔH of this equation.

Question 14

In order for a reaction to occur, reactant molecules must attain a certain amount of energy called _______.

Accepted Answer

A)  ΔH 
B)  energy 
C)  entropy 
D)  activation energy 
E)  Any of the above. 
A)  ΔH 
B)  energy 
C)  entropy 
D)  activation energy 
E)  Any of the above.

Question 15

An endothermic reaction is one that

Accepted Answer

A)  releases heat. 
B)  has no heat of reaction. 
C)  absorbs heat. 
D)  has reactants higher in energy than products. 
E)  has a negative heat of reaction. 
A)  releases heat. 
B)  has no heat of reaction. 
C)  absorbs heat. 
D)  has reactants higher in energy than products. 
E)  has a negative heat of reaction.

Question 16

Which of the following biological molecules are the major nutrients that make up the food that we eat? I. Proteins
II.Nucleic acids
III.Steroids
IV.Fats
V.Carbohydrates

Accepted Answer

A)  All of these are major nutrients. 
B)  I, II, IV, and V 
C)  I and V 
D)  III, IV, and V 
E)  I, IV, and V 
A)  All of these are major nutrients. 
B)  I, II, IV, and V 
C)  I and V 
D)  III, IV, and V 
E)  I, IV, and V

Question 17

One serving of animal crackers (30 g)contains 4.5 g of fat, 22 g of carbohydrates, and 2 g of proteins.Which of the following equations would you use to determine the number of calories in one serving of animal crackers?

Accepted Answer

A)  4.5 g × 4 Cal/g + 22 g × 9 Cal/g + 2 g × 4 Cal/g 
B)  4.5 g × 9 Cal/g + 22 g × 4 Cal/g + 2 g × 4 Cal/g 
C)  4.5 g × 4 Cal/g + 22 g × 4 Cal/g + 2 g × 4 Cal/g 
D)  4.5 g × 9 Cal/g + 22 g × 9 Cal/g + 2 g × 4 Cal/g 
E)  4.5 g × 4 Cal/g + 22 g × 4 Cal/g + 2 g × 9 Cal/g 
A)  4.5 g × 4 Cal/g + 22 g × 9 Cal/g + 2 g × 4 Cal/g 
B)  4.5 g × 9 Cal/g + 22 g × 4 Cal/g + 2 g × 4 Cal/g 
C)  4.5 g × 4 Cal/g + 22 g × 4 Cal/g + 2 g × 4 Cal/g 
D)  4.5 g × 9 Cal/g + 22 g × 9 Cal/g + 2 g × 4 Cal/g 
E)  4.5 g × 4 Cal/g + 22 g × 4 Cal/g + 2 g × 9 Cal/g

Question 18

How is a biochemical pathway different than a biochemical reaction?

Accepted Answer

A)  Actually, they are identical. 
B)  Only pathways occur in cells not reactions. 
C)  Only reactions occur in cells not pathways. 
D)  Reactions are catabolic, and pathways are anabolic. 
E)  A pathway is a specific sequence of reactions. 
A)  Actually, they are identical. 
B)  Only pathways occur in cells not reactions. 
C)  Only reactions occur in cells not pathways. 
D)  Reactions are catabolic, and pathways are anabolic. 
E)  A pathway is a specific sequence of reactions.

Question 19

What are biological catalysts called?

Accepted Answer

A)  proteins 
B)  nucleic acids 
C)  enzymes 
D)  carbohydrates 
E)  lipids 
A)  proteins 
B)  nucleic acids 
C)  enzymes 
D)  carbohydrates 
E)  lipids

Question 20

Identify the false statement regarding bond energy.

Accepted Answer

A)  Bonds with higher bond energies are stronger. 
B)  Stronger bonds have lower potential energy. 
C)  A single bond is stronger than a double bond. 
D)  A triple bond is stronger than a double bond. 
E)  Compounds with weaker bonds are more reactive. 
A)  Bonds with higher bond energies are stronger. 
B)  Stronger bonds have lower potential energy. 
C)  A single bond is stronger than a double bond. 
D)  A triple bond is stronger than a double bond. 
E)  Compounds with weaker bonds are more reactive.

How would this diagram be different if the reaction was exothermic?

Which part of the following energy diagram is changed when a catalyst is added, and how is it changed?

A reaction occurs between the large black spheres and the small grey spheres.Each of the boxes below represents different reaction conditions for that reaction.Which box contains the reaction conditions that leads to the fastest reaction?

Which of the following processes are anabolic?

How is the reaction that occurs in a calorimeter different from human metabolism?

Bond breaking is always endothermic and yet catabolism, the breakdown of nutrients, is an overall exothermic process.How can you reconcile these two statements?

Which of the following statements describe how oxygen intake relates to caloric requirements? I.Oxygen reacts with food to produce energy. II)The larger the oxygen intake, the higher the energy output. III)Oxygen is a product of food metabolism.

Which statement best describes the relationship between the heat of reaction and reaction rate?

A spirometer is used in indirect calorimetry.What does a spirometer measure?

The reaction between acetic acid (CH₃COOH)and methanol (CH₃OH)is at equilibrium.Select the change that would result in a shift to the right. CH₃COOH + CH₃OH ⇌ CH₃COOCH₃ + H₂O

Which statement describes reaction rate?

An exothermic reaction is one that:

The ΔH for the reaction described by the energy diagram below is

In order for a reaction to occur, reactant molecules must attain a certain amount of energy called _______.

An endothermic reaction is one that

Which of the following biological molecules are the major nutrients that make up the food that we eat? I. Proteins II.Nucleic acids III.Steroids IV.Fats V.Carbohydrates

One serving of animal crackers (30 g)contains 4.5 g of fat, 22 g of carbohydrates, and 2 g of proteins.Which of the following equations would you use to determine the number of calories in one serving of animal crackers?

How is a biochemical pathway different than a biochemical reaction?

What are biological catalysts called?

Identify the false statement regarding bond energy.

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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Exam 6: Chemical Reactions: Energy, Rates, and Equilibrium

How would this diagram be different if the reaction was exothermic?

Which part of the following energy diagram is changed when a catalyst is added, and how is it changed?

A reaction occurs between the large black spheres and the small grey spheres.Each of the boxes below represents different reaction conditions for that reaction.Which box contains the reaction conditions that leads to the fastest reaction?

Which of the following processes are anabolic?

How is the reaction that occurs in a calorimeter different from human metabolism?

Bond breaking is always endothermic and yet catabolism, the breakdown of nutrients, is an overall exothermic process.How can you reconcile these two statements?

Which of the following statements describe how oxygen intake relates to caloric requirements? I.Oxygen reacts with food to produce energy. II)The larger the oxygen intake, the higher the energy output. III)Oxygen is a product of food metabolism.

Which statement best describes the relationship between the heat of reaction and reaction rate?

A spirometer is used in indirect calorimetry.What does a spirometer measure?

The reaction between acetic acid (CH3COOH)and methanol (CH3OH)is at equilibrium.Select the change that would result in a shift to the right. CH3COOH + CH3OH ⇌ CH3COOCH3 + H2O

Which statement describes reaction rate?

An exothermic reaction is one that:

The ΔH for the reaction described by the energy diagram below is

In order for a reaction to occur, reactant molecules must attain a certain amount of energy called _______.

An endothermic reaction is one that

Which of the following biological molecules are the major nutrients that make up the food that we eat? I. Proteins II.Nucleic acids III.Steroids IV.Fats V.Carbohydrates

One serving of animal crackers (30 g)contains 4.5 g of fat, 22 g of carbohydrates, and 2 g of proteins.Which of the following equations would you use to determine the number of calories in one serving of animal crackers?

How is a biochemical pathway different than a biochemical reaction?

What are biological catalysts called?

Identify the false statement regarding bond energy.

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Changes of State and Gas Laws

Mixtures, Solution Concentrations, and Diffusion

Acids and Bases, Ph, and Buffers

Introduction to Organic Chemistry:

Alcohols, Phenols, Thiols, Ethers, and Amines

The Carbonyl Containing Functional Groups

The Common Organic Reactions in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

The reaction between acetic acid (CH₃COOH)and methanol (CH₃OH)is at equilibrium.Select the change that would result in a shift to the right. CH₃COOH + CH₃OH ⇌ CH₃COOCH₃ + H₂O