Question 1

The smallest unit of a chemical element that displays the properties of that element is a(n)

Accepted Answer

A) amino acid. 
B) molecule. 
C) atom. 
D) bond. 
A) amino acid. 
B) molecule. 
C) atom. 
D) bond.

Question 2

O₂, also termed atmospheric oxygen, is considered to be a molecule but not a compound; why not?

Accepted Answer

A) It contains no covalent bonds. 
B) It contains a double covalent bond, but not a single covalent bond. 
C) To be considered a compound there must be a minimum of three atoms; atmospheric oxygen is too small. 
D) Compounds are defined as molecules constructed from two or more different elements. 
A) It contains no covalent bonds. 
B) It contains a double covalent bond, but not a single covalent bond. 
C) To be considered a compound there must be a minimum of three atoms; atmospheric oxygen is too small. 
D) Compounds are defined as molecules constructed from two or more different elements.

Question 3

How many atoms are present in a single molecule of C₈H₁₀N₄O₂?

Accepted Answer

A) 4 
B) 8 
C) 12 
D) 24 
A) 4 
B) 8 
C) 12 
D) 24

Question 4

A solution with a pH of 3 is

Accepted Answer

A) acidic. 
B) nonpolar. 
C) basic. 
D) neutral. 
A) acidic. 
B) nonpolar. 
C) basic. 
D) neutral.

Question 5

When phospholipids are added to water, they arrange themselves so that

Accepted Answer

A) their hydrophobic tails are on the inside of a lipid droplet. 
B) their hydrophilic tails are on the outside of a lipid droplet. 
C) their hydrophobic heads are facing the water. 
D) both A and C 
A) their hydrophobic tails are on the inside of a lipid droplet. 
B) their hydrophilic tails are on the outside of a lipid droplet. 
C) their hydrophobic heads are facing the water. 
D) both A and C

Question 6

A ____________________ is a compound that maintains the pH of a solution by taking up or releasing hydrogen ions.

Accepted Answer

The answer of A ____________________ is a compound that maintains...

Question 7

Electrons are found

Accepted Answer

A) in the nucleus of an atom. 
B) only in complex molecules. 
C) in one or more shells that surround the atom's nucleus. 
D) in both the nucleus and inner shell of an atom. 
A) in the nucleus of an atom. 
B) only in complex molecules. 
C) in one or more shells that surround the atom's nucleus. 
D) in both the nucleus and inner shell of an atom.

Question 8

Based only on the illustration below it could be predicted that ice floats on liquid water because

Accepted Answer

A) the crystal structure of ice is more regular than that seen in liquid water. 
B) the distance between water molecules in ice is greater than in liquid water. 
C) the cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D) when ice forms the hydrogen bond in the water molecule becomes nonpolar; ice behaves like oil. 
A) the crystal structure of ice is more regular than that seen in liquid water. 
B) the distance between water molecules in ice is greater than in liquid water. 
C) the cool temperature of ice reduces the extent of molecular motion relative to liquid water. 
D) when ice forms the hydrogen bond in the water molecule becomes nonpolar; ice behaves like oil.

Question 9

In water, phospholipids arrange themselves such that

Accepted Answer

A) their fatty acid head groups are facing the water. 
B) their hydrophobic tails are kept away from the water. 
C) saturated fatty acids face the water while unsaturated fatty acids are separated from the water. 
D) the charged atoms on their fatty acid chains can interact directly with the water molecules. 
A) their fatty acid head groups are facing the water. 
B) their hydrophobic tails are kept away from the water. 
C) saturated fatty acids face the water while unsaturated fatty acids are separated from the water. 
D) the charged atoms on their fatty acid chains can interact directly with the water molecules.

Question 10

How many hydrogen atoms are in a molecule of C₈H₁₀N₄O₂?

Accepted Answer

A) 8 
B) 10 
C) 20 
D) 24 
A) 8 
B) 10 
C) 20 
D) 24

Question 11

Using hydrolysis, a total of ____________________ water molecules would be required to completely separate the polymer below into individual monomers.

Accepted Answer

The answer of Using hydrolysis, a total of ____________________ water...

Question 12

One of the symptoms of kidney disease is the presence of proteins in a patient's urine. To quickly test for kidney disease using a urine sample, a doctor might add a chemical that causes a color change when

Accepted Answer

A) nitrogen, but not oxygen, is present. 
B) nitrogen, but not phosphorus, is present. 
C) only oxygen and hydrogen are present. 
D) only carbon and hydrogen are present. 
A) nitrogen, but not oxygen, is present. 
B) nitrogen, but not phosphorus, is present. 
C) only oxygen and hydrogen are present. 
D) only carbon and hydrogen are present.

Exam 5: The Chemistry of Life

The smallest unit of a chemical element that displays the properties of that element is a(n)

O₂, also termed atmospheric oxygen, is considered to be a molecule but not a compound; why not?

How many atoms are present in a single molecule of C₈H₁₀N₄O₂?

A solution with a pH of 3 is

When phospholipids are added to water, they arrange themselves so that

A ____________________ is a compound that maintains the pH of a solution by taking up or releasing hydrogen ions.

Electrons are found

Based only on the illustration below it could be predicted that ice floats on liquid water because

In water, phospholipids arrange themselves such that

How many hydrogen atoms are in a molecule of C₈H₁₀N₄O₂?

Using hydrolysis, a total of ____________________ water molecules would be required to completely separate the polymer below into individual monomers.

One of the symptoms of kidney disease is the presence of proteins in a patient's urine. To quickly test for kidney disease using a urine sample, a doctor might add a chemical that causes a color change when

The Nature of Science and the Characteristics of Life

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Stem Cells, Cancer, and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

Dna and Genes

From Gene to Protein

Dna Technology

How Evolution Works

Evolution of Populations

Speciation and the Origins of Biological Diversity

The Evolutionary History of Life

The Biosphere

Growth of Populations

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons, Muscles, and Movement

Defenses Against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

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