Question 1

When atoms complete their outer electron shell by sharing electrons, they form

Accepted Answer

A)   ionic bonds.
B)   covalent bonds.
C)   hydrogen bonds.
D)   anions.
E)   cations.F) A) and B)
G) C) and D)

Question 2

The nucleus of an atom consists of

Accepted Answer

A)   electrons.
B)   protons.
C)   neutrons.
D)   protons + neutrons.
E)   protons + electrons.F) All of the above
G) A) and E)

Question 3

The most important metabolic fuel molecule in the body is

Accepted Answer

A)   sucrose.
B)   caffeine.
C)   protein.
D)   vitamins.
E)   glucose.F) B) and C)
G) A) and D)

Question 4

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

Accepted Answer

carboxylic...

Question 5

The purines found in DNA are ________ and ________.

Accepted Answer

The answer of The purines found in DNA are ________...

Question 6

Molecules that do not readily dissolve in water are called ________.

Accepted Answer

The answer of Molecules that do not readily dissolve in...

Question 7

A dust particle floating on a water surface illustrates

Accepted Answer

A)   surface tension.
B)   chemical tension.
C)   static electricity.
D)   heat capacity.
E)   hydrophilic attraction.F) A) and B)
G) B) and D)

Question 8

Carbohydrates, lipids, and proteins are classified as

Accepted Answer

A)   organic molecules.
B)   inorganic molecules.
C)   acids.
D)   salts.
E)   bases.F) C) and D)
G) B) and C)

Question 9

During ionization, water molecules disrupt the ionic bonds of a salt to produce a mixture of ions. These ions can carry a current and so are called

Accepted Answer

A)   cations.
B)   anions.
C)   acids.
D)   electrolytes.
E)   counter ions.F) A) and E)
G) C) and D)

Question 10

Nonpolar organic molecules are good examples of

Accepted Answer

A)   electrolytes.
B)   molecules that will dissociate when placed into water.
C)   hydrophobic compounds.
D)   hydrophilic compounds.
E)   solutes.F) B) and C)
G) A) and E)

Question 11

Which has the greater concentration of hydrogen ions, a substance with a pH of 5 or a substance with a pH of 4?

Accepted Answer

A)   A pH of 4 is greater.
B)   A pH of 5 is greater.
C)   They are both equal; 4 and 5 are relative values.
D)   pH 9, if you mixed the solutions.
E)   Neither, pH has nothing to do with hydrogen ion concentration.F) A) and C)
G) B) and C)

Question 12

The hydrolysis of ATP yields ADP, phosphate ion, and ________.

Accepted Answer

The answer of The hydrolysis of ATP yields ADP, phosphate...

Question 13

When electrons are transferred from one atom to another, and the two atoms unite as a result of the opposite charges,

Accepted Answer

A)   an ion is formed.
B)   a free electron is formed.
C)   a hydrogen bond is formed.
D)   an ionic bond is formed.
E)   a covalent bond is formed.F) B) and D)
G) A) and C)

Question 14

Electrons whirl around the center of the atom at high speed, forming a(n) ________.

Accepted Answer

The answer of Electrons whirl around the center of the...

Question 15

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

Accepted Answer

The answer of A(n) ________ is a homogeneous mixture containing...

Question 16

An example of an organic substance is

Accepted Answer

A)   sucrose.
B)   carbonic acid.
C)   sodium chloride.
D)   oxygen.
E)   carbon dioxide.F) C) and E)
G) A) and C)

Question 17

An example of an inorganic substance is (are)

Accepted Answer

A)   fructose.
B)   water.
C)   glycerol.
D)   carbon dioxide.
E)   both water and carbon dioxide.F) B) and E)
G) B) and C)

Question 18

Atoms of the same element whose nuclei contain the same number of protons, but different numbers of neutrons, are called ________.

Accepted Answer

The answer of Atoms of the same element whose nuclei...

Question 19

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Accepted Answer

A)   inorganic compounds.
B)   organic compounds.
C)   nutrients.
D)   metabolites.
E)   enzymes.F) B) and E)
G) D) and E)

Question 20

AB → A + B is to decomposition as A + B → AB is to

Accepted Answer

A)   exchange.
B)   synthesis.
C)   combustion.
D)   replacement.
E)   metabolism.F) None of the above
G) A) and B)

Exam 2: Chemical Level of Organization

The most important metabolic fuel molecule in the body is

Correct AnswerverifiedShow Answer

Atoms of the same element whose nuclei contain the same number of protons, but different numbers of neutrons, are called ________.

Correct AnswerverifiedShow Answer

AB → A + B is to decomposition as A + B → AB is to

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An example of an organic substance is

Correct AnswerverifiedShow Answer

Electrons whirl around the center of the atom at high speed, forming a(n) ________.

Correct AnswerverifiedShow Answer

Nonpolar organic molecules are good examples of

Correct AnswerverifiedShow Answer

Which has the greater concentration of hydrogen ions, a substance with a pH of 5 or a substance with a pH of 4?

Correct AnswerverifiedShow Answer

The hydrolysis of ATP yields ADP, phosphate ion, and ________.

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedcarboxylic...View AnswerShow Answer

The purines found in DNA are ________ and ________.

Correct AnswerverifiedShow Answer

The nucleus of an atom consists of

Correct AnswerverifiedShow Answer

During ionization, water molecules disrupt the ionic bonds of a salt to produce a mixture of ions. These ions can carry a current and so are called

Correct AnswerverifiedShow Answer

A dust particle floating on a water surface illustrates

Correct AnswerverifiedShow Answer

An example of an inorganic substance is (are)

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Carbohydrates, lipids, and proteins are classified as

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

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Molecules that do not readily dissolve in water are called ________.

Correct AnswerverifiedShow Answer

When electrons are transferred from one atom to another, and the two atoms unite as a result of the opposite charges,

Correct AnswerverifiedShow Answer

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Correct AnswerverifiedShow Answer

When atoms complete their outer electron shell by sharing electrons, they form

Correct AnswerverifiedShow Answer

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carboxylic...
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The purines found in DNA are and .

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