Question 1

The molecule H2 is known as

Accepted Answer

A)  hydrohydrogen.
B)  hydrogen.
C)  hydroxide.
D)  helium.
E)  semi-water.

Question 2

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 + electrons

Question 3

Magnesium atoms have two electrons in their outermost shells,and chlorine atoms have seven.The compound magnesium chloride would contain

Accepted Answer

A)  1 magnesium and 1 chlorine.
B)  1 magnesium and 2 chlorine.
C)  2 magnesium and 1 chlorine.
D)  2 magnesium and 7 chlorine.
E)  It is impossible to determine without more information.

Question 4

Which element commonly has only a proton as its nucleus?

Accepted Answer

A)  helium
B)  neon
C)  argon
D)  hydrogen
E)  None of the answers is correct.

Question 5

Adding a phosphate group to adenosine forms

Accepted Answer

A)  ADP.
B)  ATP.
C)  AMP.
D)  2ATP.
E)  ribose.

Question 6

Explain why enzymes are often called organic catalysts.

Accepted Answer

Enzymes are special ...

Question 7

The innermost electron shell in an atom holds up to ________ electrons.

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  8

Question 8

Which of the following is/are inorganic substance(s) ?

Accepted Answer

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

Question 9

Adenosine is formed by combining

Accepted Answer

A)  adenine and ribose.
B)  adenine and phosphate group.
C)  ribose and a phosphate group.
D)  adenine,ribose,and a phosphate group.
E)  adenine,ribose,and 3 phosphate groups.

Question 10

Ions with a + charge are called

Accepted Answer

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

Question 11

Explain why we can use the term molecule for the smallest particle of water but not for that of table salt.

Accepted Answer

The term molecule refers only to chemica...

Question 12

Describe the kind of bonds that hold the atoms in a water molecule together.

Accepted Answer

A)  Water molecule bonds are ionic bonds,in which electrons are gained and lost to create the bond.
B)  Water molecule bonds are oxygen bonds,in which oxygen atoms form bonds together.
C)  Water molecule bonds are polar covalent bonds,in which unequal sharing of electrons occurs.
D)  Water molecule bonds are nonpolar covalent bonds,in which equal sharing of electrons occurs.
E)  Water molecules bonds are nonpolar ionic bonds,in which equal movement of electrons occurs.

Question 13

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.

Question 14

Which of the following lipids are produced in response to cellular injury or disease?

Accepted Answer

A)  cholesterol
B)  glycolipids
C)  phospholipids
D)  sex steroids
E)  leukotrienes

Question 15

The most important metabolic fuel molecule in the body is

Accepted Answer

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

Question 16

What is the source of energy that converts glucose,a six-carbon molecule,into two three-carbon molecules in cells?

Accepted Answer

A)  The potential energy stored in the ionic bonds of the glucose molecule is released when some of the bonds break.
B)  The kinetic energy released as ions are formed when glucose is broken down.
C)  The potential energy stored in the covalent bonds of the glucose molecule is released when some of the bonds break.
D)  The kinetic energy released as one glucose molecule combines with another glucose molecule.
E)  The kinetic energy is converted to potential energy as the glucose molecule forms.

Question 17

Why is cholesterol necessary in the body?

Accepted Answer

A)  It is important for energy production.
B)  It is an important enzyme.
C)  It is a building block for proteins.
D)  It is a component of plasma membranes and is important for cell growth and division.
E)  It makes up the genetic material.

Question 18

By what means are water molecules attracted to each other?

Accepted Answer

A)  by oxygen bonds
B)  by hydrogen bonds
C)  by ionic bonds
D)  by nonpolar covalent bonds
E)  by isotopes

Question 19

In dehydration reactions,compounds

Accepted Answer

A)  lose water molecules.
B)  gain water molecules.
C)  convert water molecules to hydrogen and oxygen.
D)  convert hydrogen and oxygen to water.
E)  gain electrons.

Question 20

In the hydrolysis of a triglyceride,what are the reactants and the products?

Accepted Answer

A)  The reactants are a glycerol molecule and three fatty acids; the products are a triglyceride and three water molecules.
B)  The reactants are a triglyceride and three water molecules; the products are a glycerol molecule and three fatty acids.
C)  The reactants are a glucose monomer and three water molecules; the products are a glycogen molecule and three fatty acids.
D)  The reactants are a glycogen molecule and three water molecules; the products are a glucose monomer and three fatty acids.
E)  The reactants are a glycine molecule and three water molecules; the products are a glyceride molecule and three fatty acids.

Exam 2: Chemical Level of Organization

Magnesium atoms have two electrons in their outermost shells,and chlorine atoms have seven.The compound magnesium chloride would contain

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Which of the following lipids are produced in response to cellular injury or disease?

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In dehydration reactions,compounds

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The innermost electron shell in an atom holds up to ________ electrons.

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Describe the kind of bonds that hold the atoms in a water molecule together.

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

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The most important metabolic fuel molecule in the body is

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Which element commonly has only a proton as its nucleus?

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

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Which of the following is/are inorganic substance(s) ?

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Explain why enzymes are often called organic catalysts.

Correct AnswerverifiedEnzymes are special ...View AnswerShow Answer

Adenosine is formed by combining

Correct AnswerverifiedShow Answer

Ions with a + charge are called

Correct AnswerverifiedShow Answer

In the hydrolysis of a triglyceride,what are the reactants and the products?

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What is the source of energy that converts glucose,a six-carbon molecule,into two three-carbon molecules in cells?

Correct AnswerverifiedShow Answer

By what means are water molecules attracted to each other?

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The molecule H2 is known as

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Why is cholesterol necessary in the body?

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Adding a phosphate group to adenosine forms

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Explain why we can use the term molecule for the smallest particle of water but not for that of table salt.

Correct AnswerverifiedThe term molecule refers only to chemica...View AnswerShow Answer

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Enzymes are special ...
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The molecule H₂ is known as

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The term molecule refers only to chemica...
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