Question 1

When an individual has phenylketonuria (PKU),

Accepted Answer

A)  their blood tyrosine level is too high. 
B)  they do not produce phenylpyruvate. 
C)  they cannot produce phenylalanine . 
D)  their phenylalanine level can become too high without a restricted diet. 
E)  it usually is not possible to diagnose it until late in life. 
A)  their blood tyrosine level is too high. 
B)  they do not produce phenylpyruvate. 
C)  they cannot produce phenylalanine . 
D)  their phenylalanine level can become too high without a restricted diet. 
E)  it usually is not possible to diagnose it until late in life.

Question 2

In an oxidation-reduction reaction, the species that gains 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 3

The following reaction is an example of a(n)

Accepted Answer

A)  neutralization. 
B)  combustion. 
C)  oxidation. 
D)  reduction. 
E)  condensation. 
A)  neutralization. 
B)  combustion. 
C)  oxidation. 
D)  reduction. 
E)  condensation.

Question 4

The following reaction is an example of a(n) ___________ reaction. CH4 + 2O2 → CO2 + 2H2O
I. oxidation-reduction
II. acid-Base
III. combustion

Accepted Answer

A)  I only 
B)  I and II only 
C)  III only 
D)  I and III only 
E)  I, II and III 
A)  I only 
B)  I and II only 
C)  III only 
D)  I and III only 
E)  I, II and III

Question 5

Which of the following is a free radical?

Accepted Answer

A)  ".OH" 
B)  "HCOO-" 
C)  " 
Vitamin C" 
D)  Mg2+" 
E)  O2" 
A)  ".OH" 
B)  "HCOO-" 
C)  " 
Vitamin C" 
D)  Mg2+" 
E)  O2"

Question 6

What is the product of the following reaction?

Accepted Answer

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

Question 7

Which statement about vitamins is NOT true?

Accepted Answer

A)  Water soluble vitamins are excreted in the urine. 
B)  Fat soluble vitamins are stored in fat. 
C)  Vitamin C is an example of a water soluble vitamin. 
D)  Water soluble vitamins should be replenished daily. 
E)  Fat soluble vitamins are readily excreted in the urine. 
A)  Water soluble vitamins are excreted in the urine. 
B)  Fat soluble vitamins are stored in fat. 
C)  Vitamin C is an example of a water soluble vitamin. 
D)  Water soluble vitamins should be replenished daily. 
E)  Fat soluble vitamins are readily excreted in the urine.

Question 8

The first two steps of ethanol metabolism are shown below. Which molecule is reduced over the course of these reactions?

Accepted Answer

A)  ethanol and acetaldehyde 
B)  alcohol dehydrogenase and acetaldehyde dehydrogenase 
C)  ethanol and alcohol dehydrogenase 
D)  acetic acid 
E)  NAD+ 
A)  ethanol and acetaldehyde 
B)  alcohol dehydrogenase and acetaldehyde dehydrogenase 
C)  ethanol and alcohol dehydrogenase 
D)  acetic acid 
E)  NAD+

Question 9

Which vitamin is NAD+/NADH produced from 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 10

FAD and NAD+ are examples of

Accepted Answer

A)  enzymes. 
B)  coenzymes. 
C)  vitamins. 
D)  substrates. 
E)  inhibitors. 
A)  enzymes. 
B)  coenzymes. 
C)  vitamins. 
D)  substrates. 
E)  inhibitors.

Question 11

Sorbitol is a sweetener often used in chewing gum and diet drinks. It is obtained by the following reaction. Is glucose oxidized or reduced during the reaction?

Accepted Answer

A)  It is oxidized. 
B)  It is reduced. 
C)  It is neither oxidized nor reduced. 
D)  It is both oxidized and reduced. 
E)  Many different reactions occur. 
A)  It is oxidized. 
B)  It is reduced. 
C)  It is neither oxidized nor reduced. 
D)  It is both oxidized and reduced. 
E)  Many different reactions occur.

Question 12

An antioxidant is a substance that prevents ____________ of other cellular substances.

Accepted Answer

A)  all reduction 
B)  harmful reduction 
C)  all oxidation 
D)  harmful oxidation 
E)  both oxidation and reduction 
A)  all reduction 
B)  harmful reduction 
C)  all oxidation 
D)  harmful oxidation 
E)  both oxidation and reduction

Question 13

What does [H] 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 hydrogen 
A)  the oxidizing agent 
B)  the species that is oxidized 
C)  the reducing agent 
D)  the species that is protonated 
E)  atomic hydrogen

Question 14

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 15

Which statement best describes the following reaction?

Accepted Answer

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

Question 16

During hydrolysis reactions, like all reactions, some bonds are broken and new ones are formed. Which bonds are broken and which 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 17

When unsaturated fatty acids are hydrogenated, an isomerization reaction sometimes occurs producing

Accepted Answer

A)  saturated fatty acids. 
B)  unsaturated fatty acid. 
C)  cis-fats. 
D)  trans-fats. 
E)  carboxylate ions. 
A)  saturated fatty acids. 
B)  unsaturated fatty acid. 
C)  cis-fats. 
D)  trans-fats. 
E)  carboxylate ions.

Question 18

Which of the following statements describes coenzymes?

Accepted Answer

A)  They are organic molecules derived from vitamins. 
B)  They are only found in bacterial cells. 
C)  They are chemically unchanged over the course of a reaction. 
D)  They are enzymes. 
E)  They are oxidoreductases. 
A)  They are organic molecules derived from vitamins. 
B)  They are only found in bacterial cells. 
C)  They are chemically unchanged over the course of a reaction. 
D)  They are enzymes. 
E)  They are oxidoreductases.

Question 19

The following reaction shows the oxidation-reduction reaction of FAD/FADH2. Which choice correctly identifies each molecule?

Accepted Answer

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

Question 20

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.

When an individual has phenylketonuria (PKU),

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

The following reaction is an example of a(n)

The following reaction is an example of a(n) ___________ reaction. CH₄ + 2O₂ → CO₂ + 2H₂O I. oxidation-reduction II. acid-Base III. combustion

Which of the following is a free radical?

What is the product of the following reaction?

Which statement about vitamins is NOT true?

The first two steps of ethanol metabolism are shown below. Which molecule is reduced over the course of these reactions?

Which vitamin is NAD⁺/NADH produced from in the body?

FAD and NAD⁺ are examples of

Sorbitol is a sweetener often used in chewing gum and diet drinks. It is obtained by the following reaction. Is glucose oxidized or reduced during the reaction?

An antioxidant is a substance that prevents ____________ of other cellular substances.

What does [H] represent in the following reaction?

When ethanol is metabolized, it is

Which statement best describes the following reaction?

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

When unsaturated fatty acids are hydrogenated, an isomerization reaction sometimes occurs producing

Which of the following statements describes coenzymes?

The following reaction shows the oxidation-reduction reaction of FAD/FADH₂. Which choice correctly identifies each molecule?

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

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

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Exam 10: The Reactions of Organic Functional Groups in Biochemistry

When an individual has phenylketonuria (PKU),

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

The following reaction is an example of a(n)

The following reaction is an example of a(n) ___________ reaction. CH4 + 2O2 → CO2 + 2H2O I. oxidation-reduction II. acid-Base III. combustion

Which of the following is a free radical?

What is the product of the following reaction?

Which statement about vitamins is NOT true?

The first two steps of ethanol metabolism are shown below. Which molecule is reduced over the course of these reactions?

Which vitamin is NAD+/NADH produced from in the body?

FAD and NAD+ are examples of

Sorbitol is a sweetener often used in chewing gum and diet drinks. It is obtained by the following reaction. Is glucose oxidized or reduced during the reaction?

An antioxidant is a substance that prevents ____________ of other cellular substances.

What does [H] represent in the following reaction?

When ethanol is metabolized, it is

Which statement best describes the following reaction?

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

When unsaturated fatty acids are hydrogenated, an isomerization reaction sometimes occurs producing

Which of the following statements describes coenzymes?

The following reaction shows the oxidation-reduction reaction of FAD/FADH2. Which choice correctly identifies each molecule?

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

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Changes of State and the Gas Laws

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

The following reaction is an example of a(n) ___________ reaction. CH₄ + 2O₂ → CO₂ + 2H₂O I. oxidation-reduction II. acid-Base III. combustion

Which vitamin is NAD⁺/NADH produced from in the body?

FAD and NAD⁺ are examples of

The following reaction shows the oxidation-reduction reaction of FAD/FADH₂. Which choice correctly identifies each molecule?