Question 1

Which number represents the atomic weight of oxygen?

Accepted Answer

A)  6 
B)  16 
C)  18 
D)  Not enough information given 
A)  6 
B)  16 
C)  18 
D)  Not enough information given

Question 2

Organic molecules that end in the suffix "-ase" often function as ________ molecules.

Accepted Answer

A)  structural 
B)  enzymatic 
C)  transport 
D)  storage 
A)  structural 
B)  enzymatic 
C)  transport 
D)  storage

Question 3

Water is the least dense when it ________.

Accepted Answer

A)  freezes 
B)  is just above freezing 
C)  is at room temperature 
D)  is just below boiling 
A)  freezes 
B)  is just above freezing 
C)  is at room temperature 
D)  is just below boiling

Question 4

To a large extent,a protein's function is dependent upon its shape.What determines a protein's shape?

Accepted Answer

A)  The location of the active site 
B)  The sequence of amino acids 
C)  The number of amino acids 
D)  The number of peptide bonds 
A)  The location of the active site 
B)  The sequence of amino acids 
C)  The number of amino acids 
D)  The number of peptide bonds

Question 5

Which of the following dietary fats is considered to be the least healthy?

Accepted Answer

A)  Saturated fat 
B)  Unsaturated fat 
C)  Trans fat 
D)  Cholesterol 
A)  Saturated fat 
B)  Unsaturated fat 
C)  Trans fat 
D)  Cholesterol

Question 6

What is the basic structure of most lipids?

Accepted Answer

A)  A glycerol head and up to three fatty acid tails 
B)  A linear chain of individual monomers 
C)  A branched chain of individual monomers 
D)  A chain of fatty acid tails 
A)  A glycerol head and up to three fatty acid tails 
B)  A linear chain of individual monomers 
C)  A branched chain of individual monomers 
D)  A chain of fatty acid tails

Question 7

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

Accepted Answer

A)  Transport 
B)  Catalyze reactions via enzymes 
C)  Movement 
D)  Energy storage 
A)  Transport 
B)  Catalyze reactions via enzymes 
C)  Movement 
D)  Energy storage

Question 8

Something with a pH of 5 would be ________.

Accepted Answer

A)  acidic 
B)  basic 
C)  neutral 
D)  alkaline 
A)  acidic 
B)  basic 
C)  neutral 
D)  alkaline

Question 9

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

Accepted Answer

A)  nitrogen 
B)  carbon 
C)  oxygen 
D)  hydrogen 
A)  nitrogen 
B)  carbon 
C)  oxygen 
D)  hydrogen

Question 10

What kind of bond joins amino acids together to form a protein?

Accepted Answer

A)  Peptide bond 
B)  Hydrogen bond 
C)  Polar bond 
D)  Protein bond 
A)  Peptide bond 
B)  Hydrogen bond 
C)  Polar bond 
D)  Protein bond

Question 11

Why does sweating cool your skin on a hot,dry day but make you feel warmer on a hot,humid day?

Accepted Answer

Evaporating sweat cools the skin as the

Question 12

Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

Accepted Answer

A)  C₁₀H₈ and 10 CO₂ 
B)  12 O₂ and 4 H₂O 
C)  C₁₀H₈ and 12 O₂ 
D)  10 CO₂ and 4 H₂O 
A)  C₁₀H₈ and 10 CO₂ 
B)  12 O₂ and 4 H₂O 
C)  C₁₀H₈ and 12 O₂ 
D)  10 CO₂ and 4 H₂O

Question 13

During a chemical reaction,atoms are ________.

Accepted Answer

A)  destroyed 
B)  created 
C)  rearranged 
D)  destroyed and created 
A)  destroyed 
B)  created 
C)  rearranged 
D)  destroyed and created

Question 14

Evaluate this statement: Cholesterol is a type of lipid,and thus all cholesterol lipids are bad for human health.

Accepted Answer

A)  True, because high levels of cholesterol lead to increased heart disease. 
B)  True, because high levels of cholesterol lead to obesity. 
C)  False, because some types cholesterol increase heart disease, but other types are necessary, especially in the plasma membrane. 
D)  False, because cholesterol levels are not related to human health. 
A)  True, because high levels of cholesterol lead to increased heart disease. 
B)  True, because high levels of cholesterol lead to obesity. 
C)  False, because some types cholesterol increase heart disease, but other types are necessary, especially in the plasma membrane. 
D)  False, because cholesterol levels are not related to human health.

Question 15

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Accepted Answer

A)  The adhesion of water molecules to the needle 
B)  The cohesion of water molecules to each other 
C)  The solubility of water 
D)  The heat capacity of water 
A)  The adhesion of water molecules to the needle 
B)  The cohesion of water molecules to each other 
C)  The solubility of water 
D)  The heat capacity of water

Question 16

Which is not one of the four atoms that make up the bulk of living organisms?

Accepted Answer

A)  Oxygen 
B)  Nitrogen 
C)  Calcium 
D)  Carbon 
A)  Oxygen 
B)  Nitrogen 
C)  Calcium 
D)  Carbon

Which number represents the atomic weight of oxygen?

Organic molecules that end in the suffix "-ase" often function as ________ molecules.

Water is the least dense when it ________.

To a large extent,a protein's function is dependent upon its shape.What determines a protein's shape?

Which of the following dietary fats is considered to be the least healthy?

What is the basic structure of most lipids?

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

Something with a pH of 5 would be ________.

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

What kind of bond joins amino acids together to form a protein?

Why does sweating cool your skin on a hot,dry day but make you feel warmer on a hot,humid day?

Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

During a chemical reaction,atoms are ________.

Evaluate this statement: Cholesterol is a type of lipid,and thus all cholesterol lipids are bad for human health.

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Which is not one of the four atoms that make up the bulk of living organisms?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Dna: the Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Filters

Exam 2: The Chemistry of Life

Which number represents the atomic weight of oxygen?

Organic molecules that end in the suffix "-ase" often function as ________ molecules.

Water is the least dense when it ________.

To a large extent,a protein's function is dependent upon its shape.What determines a protein's shape?

Which of the following dietary fats is considered to be the least healthy?

What is the basic structure of most lipids?

Proteins are diverse molecules that perform a wide variety of functions.Which of the following is not a typical function of proteins?

Something with a pH of 5 would be ________.

Organic compounds are distinguished by molecules that contain ________ bonded to other elements.

What kind of bond joins amino acids together to form a protein?

Why does sweating cool your skin on a hot,dry day but make you feel warmer on a hot,humid day?

Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

During a chemical reaction,atoms are ________.

Evaluate this statement: Cholesterol is a type of lipid,and thus all cholesterol lipids are bad for human health.

A needle can be made to "float" on the surface tension of water.What causes this surface tension to form?

Which is not one of the four atoms that make up the bulk of living organisms?

An Introduction to the Science of Life

The Cell: The Fundamental Unit of Life

Energy and Life

Chromosomes and Inheritance

Dna: the Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Filters