Question 1

___________ are a common fuel nutrient that has glycogen as a storage form.

Accepted Answer

A)   Carbohydrates
B)   Lipids
C)   Proteins
D)   Nucleic acidsE) None of the above
F) A) and B)

Question 2

Chemicals that resist changes in pH when acids or bases are added to a solution are

Accepted Answer

A)   acids.
B)   bases.
C)   salts.
D)   buffers.E) A) and B)
F) A) and C)

Question 3

According to the law of conservation of energy, the total energy of the universe is:

Accepted Answer

A)   constant
B)   increasing exponentially
C)   decreasing exponentially
D)   increasing linearly
E)   decreasing linearly.F) A) and B)
G) A) and C)

Question 4

Substances that donate hydrogen ions (protons)  to a solution are called

Accepted Answer

A)   acids.
B)   bases.
C)   alkaline.
D)   salts.E) A) and C)
F) B) and C)

Question 5

A(n)  __________ is formed when two atoms share electrons.

Accepted Answer

A)   ion
B)   ionic bond
C)   hydrogen bond
D)   covalent bond
E)   atomF) A) and B)
G) B) and C)

Question 6

__________ is formed by the reaction of an acid and a base.

Accepted Answer

A)   An acid
B)   A base
C)   A salt
D)   A bufferE) None of the above
F) A) and B)

Question 7

Which of these statements concerning lipids is NOT true?

Accepted Answer

A)   The building blocks of fats (triglycerides)  are fatty acids and glycerol.
B)   A fatty acid that contains only single covalent bonds between the carbon atoms is called unsaturated.
C)   Fats, phospholipids, and steroids are lipids.
D)   Lipids are substances that dissolve in nonpolar solvents.E) A) and B)
F) All of the above

Question 8

The building blocks for proteins are

Accepted Answer

A)   monosaccharides.
B)   disaccharides.
C)   glycerol + fatty acids.
D)   nucleotides.
E)   amino acids.F) A) and E)
G) All of the above

Question 9

Which of these is an organic molecule?

Accepted Answer

A)   H2O
B)   H2CO3
C)   CO2
D)   NaCl
E)   CaCl2F) A) and D)
G) A) and C)

Question 10

A solution with a pH of 4 would have _____ hydrogen ions than a solution with a pH of 6.

Accepted Answer

A)   2 times more
B)   2 times fewer
C)   20 times more
D)   20 times fewer
E)   100 times moreF) C) and D)
G) None of the above

Question 11

Sucrose is an example of

Accepted Answer

A)   a monosaccharide.
B)   a lipid.
C)   a disaccharide.
D)   an inorganic molecule.
E)   a polysaccharide.F) None of the above
G) A) and E)

Question 12

A(n)  __________ is formed when one atom loses an electron and another atom accepts that electron.

Accepted Answer

A)   ion
B)   ionic bond
C)   hydrogen bond
D)   covalent bond
E)   atomF) A) and C)
G) A) and E)

Question 13

The mass number of an element is:

Accepted Answer

A)   the number of neutrons in the atom.
B)   the number of protons in the atom.
C)   the sum of the number of protons plus the number of neutrons.
D)   the sum of the number of protons plus the number of electrons.
E)   the sum of the number of neutrons plus the number of electronsF) A) and E)
G) A) and B)

Question 14

If the products of a chemical reaction contain less potential energy than the reactants,

Accepted Answer

A)   energy has been stored in the molecular bonds of the product.
B)   energy has been released by the breaking of molecular bonds.
C)   the reaction will be reversible without additional energy input.
D)   a synthesis reaction is likely to have occurred.
E)   All of these choices are correct.F) B) and E)
G) A) and E)

Question 15

Which of the following processes represents a synthesis reaction?

Accepted Answer

A)   glycolysis
B)   the creation of a protein from amino acids
C)   glycogenolysis
D)   All of these are synthesis reactions.E) A) and B)
F) A) and C)

Question 16

The chemical notation for Magnesium ions is Mg+2. The designation 2+ indicates that:

Accepted Answer

A)   two electrons have been lost
B)   two protons have been gained
C)   the ion is negatively charged
D)   the atomic number is two
E)   the number of electrons equals the number of protons.F) B) and E)
G) A) and E)

Question 17

Atom Y has 11 protons, 11 electrons, and 12 neutrons. What is the mass number of Atom Y?

Accepted Answer

A)   11
B)   12
C)   22
D)   23
E)   24F) A) and D)
G) D) and E)

Question 18

Which of the following is considered a compound but not a molecule?

Accepted Answer

A)   water (H20) .
B)   sodium chloride (NaCl) .
C)   calcium (Ca2+) 
D)   glucose (C6H12O6) 
E)   all of these are compounds and molecules.F) A) and B)
G) A) and C)

Question 19

Atoms that have gained or lost electrons are called

Accepted Answer

A)   ions.
B)   covalents.
C)   nonpolars.
D)   molecules.
E)   neutrons.F) A) and B)
G) B) and E)

Question 20

The conversion between different states of energy (e.g. potential energy to kinetic energy) :

Accepted Answer

A)   is not 100% efficent
B)   is 100% efficent
C)   typically generates heat
D)   is not possible, energy can not change its state.
E)   is not 100% efficent and typically generates heatF) B) and D)
G) A) and B)

Exam 2: The Chemical Basis of Life

Substances that donate hydrogen ions (protons) to a solution are called

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The mass number of an element is:

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The conversion between different states of energy (e.g. potential energy to kinetic energy) :

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A(n) __________ is formed when two atoms share electrons.

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___________ are a common fuel nutrient that has glycogen as a storage form.

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If the products of a chemical reaction contain less potential energy than the reactants,

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A solution with a pH of 4 would have _____ hydrogen ions than a solution with a pH of 6.

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Which of the following processes represents a synthesis reaction?

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The building blocks for proteins are

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A(n) __________ is formed when one atom loses an electron and another atom accepts that electron.

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The chemical notation for Magnesium ions is Mg+2. The designation 2+ indicates that:

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Which of these is an organic molecule?

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Atoms that have gained or lost electrons are called

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__________ is formed by the reaction of an acid and a base.

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Atom Y has 11 protons, 11 electrons, and 12 neutrons. What is the mass number of Atom Y?

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Which of the following is considered a compound but not a molecule?

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Which of these statements concerning lipids is NOT true?

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According to the law of conservation of energy, the total energy of the universe is:

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Sucrose is an example of

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Chemicals that resist changes in pH when acids or bases are added to a solution are

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The chemical notation for Magnesium ions is Mg⁺². The designation 2+ indicates that:

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