Question 1

The_____term means each enzyme catalyzes only one type of reaction.

Accepted Answer

A)   monoreactive
B)   activation
C)   saturation
D)   inertia
E)   specificityF) A) and C)
G) A) and B)

Question 2

The_______ of a radioactive substance is the time required for a 50 percent reduction in the rate of radiation emission.

Accepted Answer

The answer of The_______ of a radioactive substance is the...

Question 3

Indicate which of these lists contains only trace elements.

Accepted Answer

A)   sulfur, chlorine, oxygen
B)   silicon, fluorine, tin
C)   selenium, hydrogen, calcium
D)   cobalt, calcium, sodium
E)   boron, oxygen, carbonF) B) and C)
G) A) and D)

Question 4

Kinetic energy is stored as _________energy when a spring is stretched

Accepted Answer

The answer of Kinetic energy is stored as _________energy when...

Question 5

_________ compounds do not usually contain carbon as a primary structural atom.

Accepted Answer

The answer of _________ compounds do not usually contain carbon...

Question 6

An) __________is a homogeneous mixture containing a solvent and a solute.

Accepted Answer

The answer of An) __________is a homogeneous mixture containing a...

Question 7

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 8

In an aqueous solution, sodium ions would move toward

Accepted Answer

A)   the bottom.
B)   a positive terminal.
C)   a pH terminal.
D)   an organic terminal.
E)   a negative terminal.F) B) and C)
G) A) and E)

Question 9

Identify the three structural components of a nucleotide.

Accepted Answer

pentose; p...

Question 10

Which of the following is not a cation?

Accepted Answer

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

Question 11

Glycoproteins and proteoglycans are combinations of amino acids and

Accepted Answer

A)   lipids.
B)   fatty acids.
C)   nucleic acids.
D)   carbohydrates.
E)   none of the aboveF) B) and D)
G) All of the above

Question 12

In the body, inorganic compounds

Accepted Answer

A)   can serve as buffers.
B)   are structural components of cells.
C)   may be held together by ionic bonds.
D)   can make up proteins.
E)   both A and CF) A) and B)
G) A) and E)

Question 13

How does the DNA molecule control the appearance and function of a cell?

Accepted Answer

The DNA molecule controls the synthesis ...

Question 14

Radioisotopes have unstable

Accepted Answer

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

Question 15

When a small amount of HCl or NaOH is added to a solution of Na2HPO4, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na2HPO4, except

Accepted Answer

A)   Na2HPO4 is able to accept extra hydrogen ions from the HCl.
B)   Na2HPO4 adsorbs excess H+ and OH- directly onto the surface of its crystalline structure.
C)   Na2HPO4 is able to donate hydrogen ions to the OH- from NaOH.
D)   Na2HPO4 acts as a buffer.
E)   Na2HPO4 is a salt formed from reacting a strong base with a weak acid.F) A) and C)
G) A) and E)

Question 16

The three familiar states of matter are solids, liquids, and____________

Accepted Answer

The answer of The three familiar states of matter are...

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

A functional group is best described as reoccurring clusters of

Accepted Answer

A)   elements that occur in a salt.
B)   amino acids in a globular protein.
C)   atoms that greatly influence the chemical properties of molecules they are part of.
D)   atoms that function in the body.
E)   elements that form at high pH.F) A) and B)
G) A) and E)

Question 20

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

Accepted Answer

A)   anions.
B)   ionic bonds.
C)   covalent bonds.
D)   cations.
E)   hydrogen bonds.F) D) and E)
G) None of the above

Exam 2: The Chemical Level of Organization

An) __________is a homogeneous mixture containing a solvent and a solute.

Correct AnswerverifiedShow Answer

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

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In an aqueous solution, sodium ions would move toward

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Indicate which of these lists contains only trace elements.

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In the body, inorganic compounds

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

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

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How does the DNA molecule control the appearance and function of a cell?

Correct AnswerverifiedThe DNA molecule controls the synthesis ...View AnswerShow Answer

Which of the following is not a cation?

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When a small amount of HCl or NaOH is added to a solution of Na2HPO4, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na2HPO4, except

Correct AnswerverifiedShow Answer

Radioisotopes have unstable

Correct AnswerverifiedShow Answer

Identify the three structural components of a nucleotide.

Correct Answerverifiedpentose; p...View AnswerShow Answer

The_____term means each enzyme catalyzes only one type of reaction.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

_________ compounds do not usually contain carbon as a primary structural atom.

Correct AnswerverifiedShow Answer

Glycoproteins and proteoglycans are combinations of amino acids and

Correct AnswerverifiedShow Answer

The_______ of a radioactive substance is the time required for a 50 percent reduction in the rate of radiation emission.

Correct AnswerverifiedShow Answer

The three familiar states of matter are solids, liquids, and____________

Correct AnswerverifiedShow Answer

Kinetic energy is stored as _________energy when a spring is stretched

Correct AnswerverifiedShow Answer

A functional group is best described as reoccurring clusters of

Correct AnswerverifiedShow Answer

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The DNA molecule controls the synthesis ...
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When a small amount of HCl or NaOH is added to a solution of Na₂HPO₄, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na₂HPO₄, except

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pentose; p...
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