Question 1

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

Question 2

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) None of the above B

Question 3

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

Accepted Answer

A)  exchange reactions.
B)  synthesis reactions.
C)  decomposition reactions.
D)  reversible reactions.
E)  net reaction rates.F) B) and D)
G) A) and D)

Question 4

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

Accepted Answer

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

Question 5

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 D)

Question 6

Which of the following will decrease the rate at which a reaction occurs?

Accepted Answer

A)  decreasing the concentration of reactants
B)  increasing the concentration of reactants
C)  increasing the temperature
D)  increasing the amount of the required catalyst
E)  All of these will decrease the rate at which the reaction occurs.F) A) and C)
G) A) and B)

Question 7

Sucrose is an example of

Accepted Answer

A)  a monosaccharide.
B)  a lipid.
C)  a disaccharide.
D)  an inorganic molecule.
E)  a polysaccharide.F) A) and D)
G) All of the above

Question 8

In living things,which of these is most important for regulating the rate of chemical reactions?

Accepted Answer

A)  changing concentration of reactants
B)  changing temperature
C)  changing concentration and activity of enzymes catalyzing the reactions
D)  nature of reacting substances - carbohydrates react faster than lipids,for exampleE) A) and D)
F) B) and D)

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

Which of the following pairs correctly matches the example with its classification?

Accepted Answer

A)  compound - two atoms of hydrogen combined
B)  molecule - sodium chloride
C)  molecule - two hydrogen atoms and one oxygen atom combined
D)  compound - two hydrogen atoms and one oxygen atom combined
E)  Both molecule - two hydrogen atoms and one oxygen atom combined and compound - two hydrogen atoms and one oxygen atom combined are correct.F) C) and D)
G) A) and B)

Question 12

The atomic number of an atom is equal to

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 electrons.F) A) and B)
G) C) and D)

Question 13

Enzymes function by

Accepted Answer

A)  increasing the activation energy needed to start a chemical reaction.
B)  having a specific shape that allows them to bind to particular reactants.
C)  each enzyme acting as a catalyst for many different reaction types.
D)  greatly decreasing reaction rates.
E)  doing all of these.F) A) and B)
G) A) and C)

Question 14

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 D)

Question 15

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 E)
G) A) and C)

Question 16

When two or more atoms,ions,or molecules combine to form a new and larger molecule,the process is called a

Accepted Answer

A)  decomposition reaction.
B)  synthesis reaction.
C)  reversible reaction.
D)  buffer reaction.
E)  condensation reaction.F) A) and B)
G) A) and C)

Question 17

Given that sodium bicarbonate dissociates to form Na+ and HCO3- when mixed with water,which of these would be part of the explanation for taking bicarbonate (NaHCO3) for excess stomach acid?

Accepted Answer

A)  NaHCO3 will not release hydrogen ions when mixed with water.
B)  HCO3- will be a hydrogen ion acceptor.
C)  Free hydrogen ions increase the acidity of a solution.
D)  When bicarbonate ions combine with hydrogen ions,the pH increases.
E)  All of these are necessary to fully explain how sodium bicarbonate works to counter excess stomach acid.F) A) and D)
G) C) and D) E

Question 18

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) B) and D)
G) C) and D)

Question 19

Subatomic particles located in the nucleus of an atom are called

Accepted Answer

A)  protons.
B)  neutrons.
C)  electrons.
D)  orbitals.
E)  Both protons and neutrons are correct names.F) A) and E)
G) A) and C) E

Question 20

Energy

Accepted Answer

A)  is the capacity to do work.
B)  can neither be created nor destroyed.
C)  is constantly being converted into different forms by the body.
D)  can be stored in the chemical bonds between molecules/subatomic particles.
E)  All of these choices are correct.F) A) and B)
G) A) and C)

Exam 2: The Chemical Basis of Life

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

Correct AnswerverifiedShow Answer

Which of the following processes represents a synthesis reaction?

Correct AnswerverifiedB

Chemical reactions with the property of being able to proceed from reactants to products and from products to reactants are called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following will decrease the rate at which a reaction occurs?

Correct AnswerverifiedShow Answer

Sucrose is an example of

Correct AnswerverifiedShow Answer

In living things,which of these is most important for regulating the rate of chemical reactions?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following pairs correctly matches the example with its classification?

Correct AnswerverifiedShow Answer

The atomic number of an atom is equal to

Correct AnswerverifiedShow Answer

Enzymes function by

Correct AnswerverifiedShow Answer

Atoms that have gained or lost electrons are called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When two or more atoms,ions,or molecules combine to form a new and larger molecule,the process is called a

Correct AnswerverifiedShow Answer

Given that sodium bicarbonate dissociates to form Na+ and HCO3- when mixed with water,which of these would be part of the explanation for taking bicarbonate (NaHCO3) for excess stomach acid?

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

Subatomic particles located in the nucleus of an atom are called

Correct AnswerverifiedE

Energy

Correct AnswerverifiedShow Answer

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B

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Given that sodium bicarbonate dissociates to form Na⁺ and HCO₃^- when mixed with water,which of these would be part of the explanation for taking bicarbonate (NaHCO₃) for excess stomach acid?

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E

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E

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