Question 1

The mass of an atom is largely determined by the number of ________ it has.

Accepted Answer

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

Question 2

Ions with a negative charge are called

Accepted Answer

A)  cations.
B)  anions.
C)  radicals.
D)  positrons.
E)  isotopes.F) A) and C)
G) C) and D)

Question 3

Ions with a + charge are called

Accepted Answer

A)  cations.
B)  anions.
C)  radicals.
D)  positrons.
E)  isotopes.F) C) and E)
G) B) and D)

Question 4

Hydrophilic molecules readily associate with

Accepted Answer

A)  lipid molecules.
B)  hydrophobic molecules.
C)  water molecules.
D)  acids.
E)  salts.F) None of the above
G) A) and E) C

Question 5

An important buffer in body fluids is

Accepted Answer

A)  NaCl.
B)  NaOH.
C)  HCl.
D)  NaHCO₃.
E)  H₂O.F) D) and E)
G) A) and C)

Question 6

The most abundant high-energy compound in cells is

Accepted Answer

A)  DNA.
B)  adenosine diphosphate.
C)  adenosine monophosphate.
D)  adenosine triphosphate.
E)  RNA.F) All of the above
G) C) and D)

Question 7

Adenine and guanine are

Accepted Answer

A)  purines represented by T and C.
B)  pyrimidines represented by A and G.
C)  purines represented by A and G.
D)  pyrimidines represented by T and C.
E)  nucleotides represented by A and G.F) C) and E)
G) C) and D)

Question 8

Radioisotopes have unstable

Accepted Answer

A)  ions.
B)  nuclei.
C)  isotopes.
D)  electron clouds.
E)  protons.F) A) and E)
G) B) and D)

Question 9

A shortage of steroids in the body would result in a shortage of

Accepted Answer

A)  sex hormones.
B)  proteins.
C)  plasma membranes.
D)  glycogen.
E)  sex hormones and plasma membranes.F) B) and D)
G) B) and E)

Question 10

In the body,inorganic compounds

Accepted Answer

A)  can serve as buffers.
B)  can make up proteins.
C)  are made from organic compounds.
D)  are structural components of cells.
E)  are metabolized for cellular energy.F) A) and E)
G) A) and C)

Question 11

In the process of ________ a phosphate group is transferred to a molecule.

Accepted Answer

A)  ionization
B)  buffering
C)  amination
D)  dissociation
E)  phosphorylationF) All of the above
G) B) and C)

Question 12

A(n) ________ is a homogeneous mixture containing a solvent and a solute.

Accepted Answer

A)  emulsion
B)  blend
C)  compound
D)  infusion
E)  solutionF) C) and D)
G) C) and E)

Question 13

Which one of the following statements is false about the reaction H₂ + Cl₂ → 2 HCl?

Accepted Answer

A)  H₂ and Cl₂ are the reactants.
B)  HCl is the product.
C)  One molecule of hydrogen contains two atoms.
D)  Two molecules of HCl are formed in the reaction.
E)  This reaction is easily reversible.F) A) and B)
G) A) and C)

Question 14

Which of the following is not a cation?

Accepted Answer

A)  Na⁺
B)  Cl⁻
C)  K⁺
D)  Ca²⁺
E)  Mg²⁺F) B) and D)
G) A) and C)

Question 15

The mass number represents the number of

Accepted Answer

A)  protons in an atom.
B)  electrons in an ion.
C)  neutrons in an atom.
D)  protons + neutrons.
E)  neutrons + electrons.F) B) and E)
G) A) and B)

Question 16

The element sulfur has an atomic number of 16 and mass number of 32.How many neutrons are in the nucleus of a sulfur atom? If sulfur forms covalent bonds with hydrogen,how many hydrogen atoms can bond to one sulfur atom?

Accepted Answer

The number of neutrons in an atom is equ...

Question 17

All fatty acids contain a functional group at one end called the ________ acid group.

Accepted Answer

A)  linoleic
B)  ribonucleic
C)  hydroxyl
D)  glycosidic
E)  carboxylicF) B) and E)
G) A) and D) E

Question 18

When two monosaccharides undergo a dehydration synthesis,

Accepted Answer

A)  two new monosaccharides are formed.
B)  a disaccharide is formed.
C)  a polysaccharide is formed.
D)  a starch is formed.
E)  hydrolysis occurs.F) A) and B)
G) All of the above

Question 19

Which of the following statements about water is false?

Accepted Answer

A)  It is composed of polar molecules.
B)  It is responsible for much of the mass of the human body.
C)  It has a relatively low heat capacity.
D)  It can dissolve many substances.
E)  It contains hydrogen bonds.F) A) and E)
G) A) and D) C

Question 20

The group of organic compounds containing carbon,hydrogen,and oxygen in a near 1:2:1 ratio is defined as a

Accepted Answer

A)  carbohydrate.
B)  lipid.
C)  protein.
D)  nucleic acid.
E)  saturated fat.F) C) and D)
G) B) and D)

Exam 2: The Chemical Level of Organization

The mass of an atom is largely determined by the number of ________ it has.

Correct AnswerverifiedShow Answer

Ions with a negative charge are called

Correct AnswerverifiedShow Answer

Ions with a + charge are called

Correct AnswerverifiedShow Answer

Hydrophilic molecules readily associate with

Correct AnswerverifiedC

An important buffer in body fluids is

Correct AnswerverifiedShow Answer

The most abundant high-energy compound in cells is

Correct AnswerverifiedShow Answer

Adenine and guanine are

Correct AnswerverifiedShow Answer

Radioisotopes have unstable

Correct AnswerverifiedShow Answer

A shortage of steroids in the body would result in a shortage of

Correct AnswerverifiedShow Answer

In the body,inorganic compounds

Correct AnswerverifiedShow Answer

In the process of ________ a phosphate group is transferred to a molecule.

Correct AnswerverifiedShow Answer

A(n) ________ is a homogeneous mixture containing a solvent and a solute.

Correct AnswerverifiedShow Answer

Which one of the following statements is false about the reaction H₂ + Cl₂ → 2 HCl?

Correct AnswerverifiedShow Answer

Which of the following is not a cation?

Correct AnswerverifiedShow Answer

The mass number represents the number of

Correct AnswerverifiedShow Answer

The element sulfur has an atomic number of 16 and mass number of 32.How many neutrons are in the nucleus of a sulfur atom? If sulfur forms covalent bonds with hydrogen,how many hydrogen atoms can bond to one sulfur atom?

Correct AnswerverifiedThe number of neutrons in an atom is equ...View AnswerShow Answer

All fatty acids contain a functional group at one end called the ________ acid group.

Correct AnswerverifiedE

When two monosaccharides undergo a dehydration synthesis,

Correct AnswerverifiedShow Answer

Which of the following statements about water is false?

Correct AnswerverifiedC

The group of organic compounds containing carbon,hydrogen,and oxygen in a near 1:2:1 ratio is defined as a

Correct AnswerverifiedShow Answer

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C

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The number of neutrons in an atom is equ...
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E

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C

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