Question 1

Which one of the following must be broken down to fatty acids and glycerol for use as an energy source?

Accepted Answer

A)  lauric acid
B)  triglycerides
C)  prostaglandins
D)  cholesterol
E)  lecithinF) A) and E)
G) None of the above

Question 2

The atomic weight of an atom reflects the average number of

Accepted Answer

A)  protons.
B)  neutrons.
C)  electrons.
D)  protons + neutrons.
E)  protons + neutrons + electrons.F) B) and D)
G) None of the above

Question 3

The nucleus of an atom consists of

Accepted Answer

A)  electrons.
B)  protons.
C)  neutrons.
D)  protons + neutrons.
E)  protons + electrons.F) B) and D)
G) A) and B)

Question 4

The center of an atom is called the

Accepted Answer

A)  element.
B)  electron cloud.
C)  nucleus.
D)  proton.
E)  molecule.F) A) and B)
G) A) and C)

Question 5

The three familiar states of matter listed in order from the least to most thermal energy are

Accepted Answer

A)  gas,solid,liquid.
B)  liquid,gas,solid.
C)  gas,liquid,solid.
D)  solid,gas,liquid.
E)  solid,liquid,gas.F) D) and E)
G) A) and B)

Question 6

________ are large lipid molecules with distinctive carbon-ring frameworks.

Accepted Answer

A)  Steroids
B)  Eicosanoids
C)  Phospholipids
D)  Glycolipids
E)  MicellesF) A) and E)
G) B) and C)

Question 7

Each of the following is an example of an inorganic compound except

Accepted Answer

A)  water.
B)  acids.
C)  bases.
D)  salts.
E)  proteins.F) A) and B)
G) B) and E)

Question 8

All of the following are true concerning enzymes except that they

Accepted Answer

A)  are proteins.
B)  function as biological catalysts.
C)  lower the activation energy required for a reaction.
D)  affect only the rate of a chemical reaction.
E)  are consumed during the reaction.F) C) and E)
G) A) and C)

Question 9

Describe the functional groups that are considered acidic or basic.

Accepted Answer

A)  An amino group acts as a base because it can accept hydrogen ions,and a carboxyl group acts as an acid because it releases a hydrogen ion.
B)  An amino group acts as a base because it releases a hydrogen ion,and a carboxyl group acts as an acid because it can accept hydrogen ions.
C)  A phosphate group acts as a base because it can accept hydrogen ions,and a hydroxyl group acts as an acid because it releases a hydrogen ion.
D)  A phosphate group acts as an acid because it can accept hydrogen ions,and a hydroxyl group acts as a base because it releases a hydrogen ion.
E)  Phosphate groups can act as an acid or a base depending on the pH of the surrounding solution.F) None of the above
G) A) and E)

Question 10

Which of the following substances would be most acidic?

Accepted Answer

A)  lemon juice,pH = 2
B)  urine,pH = 6
C)  tomato juice,pH = 4
D)  white wine,pH = 3
E)  stomach secretions,pH = 1F) All of the above
G) A) and E)

Question 11

Distinguish between hydrophilic and hydrophobic molecules.

Accepted Answer

A)  Hydrophilic molecules are attracted to water,whereas hydrophobic molecules do not interact with water molecules.
B)  Hydrophilic molecules do not interact with water molecules,whereas hydrophobic molecules are attracted to water.
C)  Hydrophilic molecules are inorganic,whereas hydrophobic molecules are organic.
D)  Hydrophilic molecules are organic,whereas hydrophobic molecules are inorganic.
E)  Hydrophilic molecules are monomers,whereas hydrophobic molecules are polymers.F) B) and E)
G) B) and D)

Question 12

List the elements that make up organic compounds.

Accepted Answer

A)  hydrogen and oxygen only
B)  hydrogen and carbon,and generally oxygen as well
C)  hydrogen,oxygen,sodium,chloride
D)  sodium,chloride,and potassium
E)  hydrogen,nitrogen,and sodiumF) B) and D)
G) C) and D)

Question 13

Of the list below,which has the highest concentration of hydroxide ions?

Accepted Answer

A)  pH 1
B)  pH 14
C)  pH 7
D)  pH 10
E)  pH 2F) B) and C)
G) B) and E)

Question 14

Compare and contrast ionic and covalent bonds.

Accepted Answer

An ionic bond is when one molecule loses...

Question 15

The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in moles per liter.

Accepted Answer

A)  dissociation
B)  electronegativity
C)  electrical current
D)  pH
E)  electropositivityF) B) and E)
G) B) and D)

Question 16

In hydrolysis reactions,compounds react with

Accepted Answer

A)  hydrogen,causing decomposition.
B)  glucose,causing decomposition.
C)  water,causing decomposition.
D)  carbon,causing decomposition.
E)  water,causing synthesis.F) B) and D)
G) C) and E)

Question 17

What is a functional group?

Accepted Answer

A)  A functional group is the result of dissociation of organic molecules.
B)  A functional group is the final energy source in organic catabolism.
C)  A functional group is the complex created when an enzymes binds its substrate to complete a reaction.
D)  A functional group is a grouping of atoms that confer specific chemical properties to the rest of the molecule to which it is attached.
E)  A functional group is the specific grouping of atoms on a molecule to which enzymes can bind.F) C) and E)
G) A) and E)

Question 18

Explain how the complementary strands of DNA are held together.

Accepted Answer

A)  They are held by ionic bonds.
B)  They are held by complementary base pairing; adenine to thymine and guanine to cytosine.
C)  They are held by complementary base pairing; adenine to cytosine and thymine to guanine.
D)  They are held by complementary base pairing; adenine to guanine and thymine to cytosine.
E)  They are held by complementary base pairing; adenine to adenine,thymine to thymine,guanine to guanine,and cytosine to cytosine.F) A) and C)
G) D) and E)

Question 19

What is the relationship between buffers and pH in physiological systems?

Accepted Answer

Buffers stabilize body pH by r...

Question 20

Which of the structural representations of glucose shown below is more common in the body?

Accepted Answer

A)  linear form
B)  ring form
C)  ionic form
D)  unsaturated form
E)  saturated formF) A) and D)
G) A) and C)

Exam 2: Chemical Level of Organization

________ are large lipid molecules with distinctive carbon-ring frameworks.

Correct AnswerverifiedShow Answer

What is a functional group?

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The nucleus of an atom consists of

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Distinguish between hydrophilic and hydrophobic molecules.

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The atomic weight of an atom reflects the average number of

Correct AnswerverifiedShow Answer

In hydrolysis reactions,compounds react with

Correct AnswerverifiedShow Answer

Which of the following substances would be most acidic?

Correct AnswerverifiedShow Answer

Which one of the following must be broken down to fatty acids and glycerol for use as an energy source?

Correct AnswerverifiedShow Answer

Explain how the complementary strands of DNA are held together.

Correct AnswerverifiedShow Answer

Describe the functional groups that are considered acidic or basic.

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The three familiar states of matter listed in order from the least to most thermal energy are

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List the elements that make up organic compounds.

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Of the list below,which has the highest concentration of hydroxide ions?

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Each of the following is an example of an inorganic compound except

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The center of an atom is called the

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Which of the structural representations of glucose shown below is more common in the body?

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All of the following are true concerning enzymes except that they

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The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in moles per liter.

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What is the relationship between buffers and pH in physiological systems?

Correct AnswerverifiedBuffers stabilize body pH by r...View AnswerShow Answer

Compare and contrast ionic and covalent bonds.

Correct AnswerverifiedAn ionic bond is when one molecule loses...View AnswerShow Answer

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Buffers stabilize body pH by r...
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An ionic bond is when one molecule loses...
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