Question 1

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) A) and E)
G) A) and D)

Question 2

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) D) and E)
G) B) and D)

Question 3

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 B)
G) B) and C)

Question 4

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) A) and C)

Question 5

Compare and contrast ionic and covalent bonds.

Accepted Answer

An ionic bond is when one molecule loses...

Question 6

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) B) and E)
G) A) and C)

Question 7

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) A) and D)
G) None of the above

Question 8

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) A) and C)
G) A) and B)

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) A) and E)
G) A) and B)

Question 10

The center of an atom is called the

Accepted Answer

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

Question 11

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

Accepted Answer

Buffers stabilize body pH by r...

Question 12

The nucleus of an atom consists of

Accepted Answer

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

Question 13

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) A) and D)
G) C) and E)

Question 14

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) A) and B)
G) All of the above

Question 15

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 E)
G) A) 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) C) and D)
G) A) and D)

Question 17

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

Accepted Answer

A)  Steroids
B)  Eicosanoids
C)  Phospholipids
D)  Glycolipids
E)  MicellesF) None of the above
G) A) and C)

Question 18

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) A) and E)
G) A) and D)

Question 19

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 20

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) A) and E)
G) C) and E)

Exam 2: Chemical Level of Organization

Compare and contrast ionic and covalent bonds.

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

Explain how the complementary strands of DNA are held together.

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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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What is a functional group?

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The center of an atom is called the

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Which of the following substances would be most acidic?

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The atomic weight of an atom reflects the average number of

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

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

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Describe the functional groups that are considered acidic or basic.

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The nucleus of an atom consists of

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

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List the elements that make up organic compounds.

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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

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

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

Correct AnswerverifiedShow Answer

All of the following are true concerning enzymes except that they

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Distinguish between hydrophilic and hydrophobic molecules.

Correct AnswerverifiedShow Answer

In hydrolysis reactions,compounds react with

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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