Question 1

Is the aldehyde oxidized or reduced during the following reaction, and how can you tell?

Accepted Answer

A)  Neither.This is not an oxidation-reduction reaction. 
B)  The aldehyde is neither oxidized nor reduced because the number of hydrogens does not change. 
C)  The aldehyde is oxidized because it loses two hydrogens. 
D)  The aldehyde is reduced because it loses two hydrogens. 
E)  The aldehyde is oxidized because it gains an oxygen. 
A)  Neither.This is not an oxidation-reduction reaction. 
B)  The aldehyde is neither oxidized nor reduced because the number of hydrogens does not change. 
C)  The aldehyde is oxidized because it loses two hydrogens. 
D)  The aldehyde is reduced because it loses two hydrogens. 
E)  The aldehyde is oxidized because it gains an oxygen.

Question 2

When ethanol is metabolized, it is

Accepted Answer

A)  synthesized. 
B)  oxidized. 
C)  anabolized. 
D)  substituted. 
E)  reduced. 
A)  synthesized. 
B)  oxidized. 
C)  anabolized. 
D)  substituted. 
E)  reduced.

Question 3

Which molecule can be oxidized to a carboxylic acid?

Accepted Answer

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

Question 4

What is the product when this compound undergoes oxidation?

Accepted Answer

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

Question 5

Consumption of ethanol represents "empty calories" because

Accepted Answer

A)  alcoholic beverages contain no nutrients. 
B)  drinking alcoholic beverages can lead to drunkenness. 
C)  alcohol contains more fat per gram than carbohydrates. 
D)  drinking alcoholic beverages can lead to liver disease. 
E)  All of the above are correct. 
A)  alcoholic beverages contain no nutrients. 
B)  drinking alcoholic beverages can lead to drunkenness. 
C)  alcohol contains more fat per gram than carbohydrates. 
D)  drinking alcoholic beverages can lead to liver disease. 
E)  All of the above are correct.

Question 6

What is the product of the following reaction?

Accepted Answer

A)  no reaction 
B)    
C)    
D)    
E)    
A)  no reaction 
B)    
C)    
D)    
E)

Question 7

From which vitamin is NAD+/NADH produced in the body?

Accepted Answer

A)  vitamin C 
B)  vitamin D 
C)  niacin 
D)  vitamin E 
E)  biotin 
A)  vitamin C 
B)  vitamin D 
C)  niacin 
D)  vitamin E 
E)  biotin

Question 8

Enzymes are categorized by

Accepted Answer

A)  their size and number of amino acids that comprise them. 
B)  their ability to dissolve in aqueous or lipid environments. 
C)  the type of reaction that they catalyze. 
D)  the cell and tissue type in which they are located. 
E)  None of the above is correct. 
A)  their size and number of amino acids that comprise them. 
B)  their ability to dissolve in aqueous or lipid environments. 
C)  the type of reaction that they catalyze. 
D)  the cell and tissue type in which they are located. 
E)  None of the above is correct.

Question 9

The sequence, ethanol → ethanal (acetaldehyde)→ ethanoic acid (acetic acid), represents a series of what kind of reactions?

Accepted Answer

A)  single replacement 
B)  oxidation 
C)  combustion 
D)  reduction 
E)  hydrolysis 
A)  single replacement 
B)  oxidation 
C)  combustion 
D)  reduction 
E)  hydrolysis

Question 10

What is the purpose of NAD+ in the body?

Accepted Answer

A)  It is an oxidizing agent. 
B)  It is a reducing agent. 
C)  It donates oxygen. 
D)  It donates hydrogen. 
E)  It accepts oxygen. 
A)  It is an oxidizing agent. 
B)  It is a reducing agent. 
C)  It donates oxygen. 
D)  It donates hydrogen. 
E)  It accepts oxygen.

Question 11

Hydrolysis is an example of an acyl group transfer reaction.To what molecule or group of atoms is an acyl group transferred during this type of reaction?

Accepted Answer

A)  an amine 
B)  -OH 
C)  a carboxylic acid 
D)  a thiol 
E)  an ether 
A)  an amine 
B)  -OH 
C)  a carboxylic acid 
D)  a thiol 
E)  an ether

Question 12

Which food is NOT high in niacin?

Accepted Answer

A)  oranges 
B)  anchovies 
C)  bran 
D)  peanuts 
E)  tuna 
A)  oranges 
B)  anchovies 
C)  bran 
D)  peanuts 
E)  tuna

Question 13

In an oxidation-reduction reaction, the species that loses electrons is

Accepted Answer

A)  oxygen. 
B)  oxidized. 
C)  hydrogen. 
D)  reduced. 
E)  carbon. 
A)  oxygen. 
B)  oxidized. 
C)  hydrogen. 
D)  reduced. 
E)  carbon.

Question 14

Which statement BEST describes the following reaction?

Accepted Answer

A)  In this reaction, both ethanol and NAD+ are reduced. 
B)  In this reaction, both ethanol and NAD+ are oxidized. 
C)  In this reaction, ethanol is reduced and NAD+ is oxidized. 
D)  In this reaction, ethanol is oxidized and NAD+ is reduced. 
E)  This is not an oxidation-reduction reaction. 
A)  In this reaction, both ethanol and NAD+ are reduced. 
B)  In this reaction, both ethanol and NAD+ are oxidized. 
C)  In this reaction, ethanol is reduced and NAD+ is oxidized. 
D)  In this reaction, ethanol is oxidized and NAD+ is reduced. 
E)  This is not an oxidation-reduction reaction.

Question 15

What does [O] represent in the following reaction?

Accepted Answer

A)  the oxidizing agent 
B)  the species that is oxidized 
C)  the reducing agent 
D)  the species that is protonated 
E)  atomic oxygen 
A)  the oxidizing agent 
B)  the species that is oxidized 
C)  the reducing agent 
D)  the species that is protonated 
E)  atomic oxygen

Question 16

Which statement BEST describes what occurs over the course of the following reaction?

Accepted Answer

A)  Two hydrogens are added to acyl-CoA, forming a double bond. 
B)  Two hydrogens are added to acyl-CoA, breaking a double bond. 
C)  Two protons are added to acyl-CoA, forming a double bond. 
D)  Two hydrogens are removed from acyl-CoA, forming a double bond. 
E)  Two protons are removed from acyl-CoA, forming a double bond. 
A)  Two hydrogens are added to acyl-CoA, forming a double bond. 
B)  Two hydrogens are added to acyl-CoA, breaking a double bond. 
C)  Two protons are added to acyl-CoA, forming a double bond. 
D)  Two hydrogens are removed from acyl-CoA, forming a double bond. 
E)  Two protons are removed from acyl-CoA, forming a double bond.

Question 17

Which statement BEST describes the distinction between a hydration and a dehydration reaction?

Accepted Answer

A)  Hydration requires a carbonyl group, and dehydration does not. 
B)  Hydration is the addition of water, and dehydration is the loss of water. 
C)  Hydration results in breaking bonds, and dehydration creates bonds. 
D)  Hydration is an oxidation, and dehydration is a reduction. 
E)  Hydration and dehydration actually describe the same process. 
A)  Hydration requires a carbonyl group, and dehydration does not. 
B)  Hydration is the addition of water, and dehydration is the loss of water. 
C)  Hydration results in breaking bonds, and dehydration creates bonds. 
D)  Hydration is an oxidation, and dehydration is a reduction. 
E)  Hydration and dehydration actually describe the same process.

Question 18

Which functional group is produced when a carboxylic acid and an alcohol react in the presence of a catalyst?

Accepted Answer

A)  an aldehyde 
B)  an ether 
C)  a ketone 
D)  an ester 
E)  a salt 
A)  an aldehyde 
B)  an ether 
C)  a ketone 
D)  an ester 
E)  a salt

Question 19

During hydrolysis reactions, as is true for all reactions, some bonds are broken and new ones are formed.Which bonds are broken, and which bonds are formed during the following hydrolysis reaction?

Accepted Answer

A)  Broken: a-b only Formed: e-a only 
B)  Broken: b-c only Formed: b-d only 
C)  Broken: b-c and d-e Formed: b-d and c-e 
D)  Broken: a-b and b-c Formed: a-e and c-e 
E)  Broken: a-b and e-d Formed: a-e and b-d 
A)  Broken: a-b only Formed: e-a only 
B)  Broken: b-c only Formed: b-d only 
C)  Broken: b-c and d-e Formed: b-d and c-e 
D)  Broken: a-b and b-c Formed: a-e and c-e 
E)  Broken: a-b and e-d Formed: a-e and b-d

Question 20

Which classification of alcohols can undergo oxidation to yield a ketone?

Accepted Answer

A)  Both primary and secondary alcohols yield ketones when oxidized. 
B)  Both secondary and tertiary alcohols yield ketones when oxidized. 
C)  Only primary alcohols yield ketones when oxidized. 
D)  Only secondary alcohols yield ketones when oxidized. 
E)  Only tertiary alcohols yield ketones when oxidized. 
A)  Both primary and secondary alcohols yield ketones when oxidized. 
B)  Both secondary and tertiary alcohols yield ketones when oxidized. 
C)  Only primary alcohols yield ketones when oxidized. 
D)  Only secondary alcohols yield ketones when oxidized. 
E)  Only tertiary alcohols yield ketones when oxidized.

Is the aldehyde oxidized or reduced during the following reaction, and how can you tell?

When ethanol is metabolized, it is

Which molecule can be oxidized to a carboxylic acid?

What is the product when this compound undergoes oxidation?

Consumption of ethanol represents "empty calories" because

What is the product of the following reaction?

From which vitamin is NAD⁺/NADH produced in the body?

Enzymes are categorized by

The sequence, ethanol → ethanal (acetaldehyde)→ ethanoic acid (acetic acid), represents a series of what kind of reactions?

What is the purpose of NAD⁺ in the body?

Hydrolysis is an example of an acyl group transfer reaction.To what molecule or group of atoms is an acyl group transferred during this type of reaction?

Which food is NOT high in niacin?

In an oxidation-reduction reaction, the species that loses electrons is

Which statement BEST describes the following reaction?

What does [O] represent in the following reaction?

Which statement BEST describes what occurs over the course of the following reaction?

Which statement BEST describes the distinction between a hydration and a dehydration reaction?

Which functional group is produced when a carboxylic acid and an alcohol react in the presence of a catalyst?

During hydrolysis reactions, as is true for all reactions, some bonds are broken and new ones are formed.Which bonds are broken, and which bonds are formed during the following hydrolysis reaction?

Which classification of alcohols can undergo oxidation to yield a ketone?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

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

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 13: The Common Organic Reactions in Biochemistry

Is the aldehyde oxidized or reduced during the following reaction, and how can you tell?

When ethanol is metabolized, it is

Which molecule can be oxidized to a carboxylic acid?

What is the product when this compound undergoes oxidation?

Consumption of ethanol represents "empty calories" because

What is the product of the following reaction?

From which vitamin is NAD+/NADH produced in the body?

Enzymes are categorized by

The sequence, ethanol → ethanal (acetaldehyde)→ ethanoic acid (acetic acid), represents a series of what kind of reactions?

What is the purpose of NAD+ in the body?

Hydrolysis is an example of an acyl group transfer reaction.To what molecule or group of atoms is an acyl group transferred during this type of reaction?

Which food is NOT high in niacin?

In an oxidation-reduction reaction, the species that loses electrons is

Which statement BEST describes the following reaction?

What does [O] represent in the following reaction?

Which statement BEST describes what occurs over the course of the following reaction?

Which statement BEST describes the distinction between a hydration and a dehydration reaction?

Which functional group is produced when a carboxylic acid and an alcohol react in the presence of a catalyst?

During hydrolysis reactions, as is true for all reactions, some bonds are broken and new ones are formed.Which bonds are broken, and which bonds are formed during the following hydrolysis reaction?

Which classification of alcohols can undergo oxidation to yield a ketone?

Matter, Energy, and Measurement

Atomic Structure and Radioisotopes

Ionic and Covalent Compounds

Molecular Geometry, Polarity, and Intermolecular

Chemical Quantities and Introduction to Reactions

Chemical Reactions: Energy, Rates, and Equilibrium

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

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

From which vitamin is NAD⁺/NADH produced in the body?

What is the purpose of NAD⁺ in the body?