Question 1

The term mass describes the material that makes up all living and nonliving things.

Accepted Answer

A) True 
 B)False  False

Question 2

If water accumulates between two sheets of glass, it is very difficult to separate them. Which of the following explanations best explains this situation?

Accepted Answer

A)   The cohesive property of water holds the two sheets of glass together.
B)   The adhesive property of water holds the sheets of glass together.
C)   The nonpolar covalent bonds in the class are attracted to the polar covalent bonds of the water, holding the two sheets of glass together.D) All of the above
E) None of the above

Question 3

Which of the following statements accurately describes lipids?

Accepted Answer

A)   Lipids are the building blocks of carbohydrates.
B)   Lipids serve as buffers.
C)   Lipids are an important component of plasma membranes.
D)   Lipids tend to be water soluble.
E)   Lipids tend to be polarized.F) D) and E)
G) B) and C) C

Question 4

What is the building block molecule of a protein?

Accepted Answer

A)   Amino acid
B)   Nucleic acid
C)   Monosaccharide
D)   Glycerol
E)   Fatty acidF) A) and B)
G) A) and C)

Question 5

An unknown molecule was detected in a tissue sample. The molecule is composed of carbon, hydrogen, and oxygen; appears to be a branching polymer; and is hydrophilic. This molecule is most likely a ________.

Accepted Answer

A)   carbohydrate
B)   lipid
C)   protein
D)   nucleic acidE) All of the above
F) None of the above A

Question 6

-Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?

Accepted Answer

A)   Phosphorus
B)   Oxygen
C)   Nitrogen
D)   Polar (hydrophilic)  region
E)   Nonpolar (hydrophobic)  regionF) A) and B)
G) B) and C)

Question 7

To which of the following organic groups does hemoglobin belong?

Accepted Answer

A)   Carbohydrate
B)   Protein
C)   Lipid
D)   Nucleic acid
E)   VitaminF) None of the above
G) A) and C)

Question 8

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded. This reaction releases water. What type of reaction is this?

Accepted Answer

A)   Catabolic
B)   Hydrolysis
C)   Dehydration
D)   MonomericE) None of the above
F) C) and D)

Question 9

Hyperventilation causes the loss of large amounts of CO2 from the body, decreasing the amount of H+ in solution. As a result,

Accepted Answer

A)   the pH of body fluids will rise.
B)   the pH of body fluids will fall.
C)   the pH of body fluids will become neutral.
D)   the pH of body fluids will not be affected.
E)   None of these choices are correct.F) A) and E)
G) A) and C)

Question 10

An example of a fat-soluble vitamin is

Accepted Answer

A)   vitamin C.
B)   vitamin D.
C)   vitamin B.
D)   vitamin F.
E)   vitamin H.F) A) and D)
G) All of the above

Question 11

-The sodium chloride molecule breaks apart in water. What does "D" represent?

Accepted Answer

A)   Chloride ion
B)   Dissociation
C)   Water molecule
D)   Sodium ion
E)   Salt crystalF) A) and B)
G) C) and E)

Question 12

The hydrogen and oxygen atoms in a molecule of water are held together by ________ bonds.

Accepted Answer

A)   ionic
B)   peptide
C)   savings
D)   polar covalent
E)   nonpolar covalentF) A) and B)
G) D) and E)

Question 13

An anion is

Accepted Answer

A)   a combination of atoms held together by chemical bonds.
B)   a positively charged ion.
C)   a negatively charged ion.
D)   a molecule that conducts electricity when placed in solution.
E)   an alteration in the three-dimensional structure of a protein.F) A) and D)
G) B) and D)

Question 14

An individual hydrogen bond in a sample of water would be described as

Accepted Answer

A)   strong and intramolecular.
B)   strong and intermolecular.
C)   weak and intramolecular.
D)   weak and intermolecular.E) All of the above
F) B) and C)

Question 15

-The sodium chloride molecule breaks apart in water. What does "A" represent?

Accepted Answer

A)   Chloride ion
B)   Dissociation
C)   Water molecule
D)   Sodium ion
E)   Salt crystalF) B) and E)
G) A) and B)

Question 16

Identify the material that would NOT be considered an important inorganic substances in our bodies.

Accepted Answer

A)   Glucose
B)   Oxygen
C)   Calcium
D)   IronE) B) and D)
F) A) and B)

Question 17

Phospholipids have a hydrophilic end which is

Accepted Answer

A)   polar and not water soluble.
B)   polar and water soluble.
C)   nonpolar and not water soluble.
D)   nonpolar and water soluble.E) A) and B)
F) A) and C)

Question 18

In a reversible reaction, when the rate of product formation is equal to the rate of reactant formation, the reaction is

Accepted Answer

A)   stopped.
B)   at equilibrium.
C)   in danger of exploding.
D)   a net decomposition reaction.
E)   a net synthesis reaction.F) B) and E)
G) None of the above

Question 19

Sodium chloride is considered a/an ________.

Accepted Answer

A)   molecule
B)   compound
C)   Both molecule and compound are correct.
D)   element
E)   ionF) A) and E)
G) C) and D)

Question 20

Nucleotides

Accepted Answer

A)   are part of DNA molecules but not RNA molecules.
B)   hold the nucleus together.
C)   are the building blocks of nucleic acids.
D)   are proteins that function as enzymes.
E)   have nothing to do with the genetic information in the nucleus.F) All of the above
G) A) and E)

Exam 2: The Chemical Basis of Life

The term mass describes the material that makes up all living and nonliving things.

Correct AnswerverifiedFalse

If water accumulates between two sheets of glass, it is very difficult to separate them. Which of the following explanations best explains this situation?

Correct AnswerverifiedShow Answer

Which of the following statements accurately describes lipids?

Correct AnswerverifiedC

What is the building block molecule of a protein?

Correct AnswerverifiedShow Answer

An unknown molecule was detected in a tissue sample. The molecule is composed of carbon, hydrogen, and oxygen; appears to be a branching polymer; and is hydrophilic. This molecule is most likely a ________.

Correct AnswerverifiedA

-Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?

Correct AnswerverifiedShow Answer

To which of the following organic groups does hemoglobin belong?

Correct AnswerverifiedShow Answer

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded. This reaction releases water. What type of reaction is this?

Correct AnswerverifiedShow Answer

Hyperventilation causes the loss of large amounts of CO2 from the body, decreasing the amount of H+ in solution. As a result,

Correct AnswerverifiedShow Answer

An example of a fat-soluble vitamin is

Correct AnswerverifiedShow Answer

-The sodium chloride molecule breaks apart in water. What does "D" represent?

Correct AnswerverifiedShow Answer

The hydrogen and oxygen atoms in a molecule of water are held together by ________ bonds.

Correct AnswerverifiedShow Answer

An anion is

Correct AnswerverifiedShow Answer

An individual hydrogen bond in a sample of water would be described as

Correct AnswerverifiedShow Answer

-The sodium chloride molecule breaks apart in water. What does "A" represent?

Correct AnswerverifiedShow Answer

Identify the material that would NOT be considered an important inorganic substances in our bodies.

Correct AnswerverifiedShow Answer

Phospholipids have a hydrophilic end which is

Correct AnswerverifiedShow Answer

In a reversible reaction, when the rate of product formation is equal to the rate of reactant formation, the reaction is

Correct AnswerverifiedShow Answer

Sodium chloride is considered a/an ________.

Correct AnswerverifiedShow Answer

Nucleotides

Correct AnswerverifiedShow Answer

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False

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C

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A

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Hyperventilation causes the loss of large amounts of CO₂ from the body, decreasing the amount of H⁺ in solution. As a result,

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