Question 1

Ions in an ionic molecule are held together due to

Accepted Answer

A)  the sharing of electrons. 
B)  the attraction of opposite electrical charges. 
C)  each electron orbiting all of the ions in the molecule. 
D)  the presence of water molecules. 
E)  the attraction of similar charges of the ions' protons. 
A)  the sharing of electrons. 
B)  the attraction of opposite electrical charges. 
C)  each electron orbiting all of the ions in the molecule. 
D)  the presence of water molecules. 
E)  the attraction of similar charges of the ions' protons.

Question 2

Lipids

Accepted Answer

A)  form essential structural components of cells. 
B)  provide a significant energy reserve. 
C)  help to maintain body temperature. 
D)  cushion organs against shocks. 
E)  All of the answers are correct. 
A)  form essential structural components of cells. 
B)  provide a significant energy reserve. 
C)  help to maintain body temperature. 
D)  cushion organs against shocks. 
E)  All of the answers are correct.

Question 3

A fatty acid with no double bonds between carbon atoms is

Accepted Answer

A)  unsaturated. 
B)  polyunsaturated. 
C)  dehydrated. 
D)  saturated. 
E)  denatured. 
A)  unsaturated. 
B)  polyunsaturated. 
C)  dehydrated. 
D)  saturated. 
E)  denatured.

Question 4

What role do buffer systems play in the human body?

Accepted Answer

Buffer systems help maintain p

Question 5

Mucins are a type of ________ that absorb water to form mucus.

Accepted Answer

A)  glycolipid 
B)  glycoprotein 
C)  proteoglycan 
D)  glyceride 
E)  glycerol 
A)  glycolipid 
B)  glycoprotein 
C)  proteoglycan 
D)  glyceride 
E)  glycerol

Question 6

In an aqueous solution, sodium ions would move toward

Accepted Answer

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

Question 7

Which of the following substances would be most acidic?

Accepted Answer

A)  lemon juice, pH = 2 
B)  urine, pH = 6 
C)  tomato juice, pH = 4 
D)  white wine, pH = 3 
E)  stomach secretions, pH = 1 
A)  lemon juice, pH = 2 
B)  urine, pH = 6 
C)  tomato juice, pH = 4 
D)  white wine, pH = 3 
E)  stomach secretions, pH = 1

Question 8

Which of these lists contains only trace elements?

Accepted Answer

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

Question 9

Muddy lake water is an example of a(n)

Accepted Answer

A)  colloid. 
B)  suspension. 
C)  solute. 
D)  solvent. 
E)  solution. 
A)  colloid. 
B)  suspension. 
C)  solute. 
D)  solvent. 
E)  solution.

Question 10

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)  There is not enough information to determine the 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)  There is not enough information to determine the answer.

Question 11

Which of the following functional groups is the carboxyl group?

Accepted Answer

A)  -NH2 
B)  -PO4 
C)  -COOH 
D)  -SH 
E)  -OH 
A)  -NH2 
B)  -PO4 
C)  -COOH 
D)  -SH 
E)  -OH

Question 12

Chemical reactions that absorb energy are called

Accepted Answer

A)  exergonic. 
B)  endergonic. 
C)  equilibrial. 
D)  decomposition. 
E)  exchange. 
A)  exergonic. 
B)  endergonic. 
C)  equilibrial. 
D)  decomposition. 
E)  exchange.

Question 13

Hydrophilic molecules readily associate with

Accepted Answer

A)  lipid molecules. 
B)  hydrophobic molecules. 
C)  water molecules. 
D)  acids. 
E)  salts. 
A)  lipid molecules. 
B)  hydrophobic molecules. 
C)  water molecules. 
D)  acids. 
E)  salts.

Question 14

Molecules that do not readily interact with water are called

Accepted Answer

A)  inert. 
B)  stable. 
C)  hydrophobic. 
D)  unstable. 
E)  hydrophilic. 
A)  inert. 
B)  stable. 
C)  hydrophobic. 
D)  unstable. 
E)  hydrophilic.

Question 15

Which of the following is not a cation?

Accepted Answer

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

Question 16

Molecules that have the same molecular formula but different structural formulas are called

Accepted Answer

A)  isotopes. 
B)  isomers. 
C)  isozymes. 
D)  isotypes. 
E)  isomoles. 
A)  isotopes. 
B)  isomers. 
C)  isozymes. 
D)  isotypes. 
E)  isomoles.

Question 17

The alpha-helix and beta sheet are examples of ________ protein structure.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentanary 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentanary

Question 18

The molecule CO2 is known as

Accepted Answer

A)  carbonized oxygen. 
B)  carbonated oxygen. 
C)  carbon monoxide. 
D)  carbon oxide. 
E)  carbon dioxide. 
A)  carbonized oxygen. 
B)  carbonated oxygen. 
C)  carbon monoxide. 
D)  carbon oxide. 
E)  carbon dioxide.

Question 19

The molecule O2 is known as

Accepted Answer

A)  oxide. 
B)  oxygen. 
C)  organic. 
D)  oxate. 
E)  a salt. 
A)  oxide. 
B)  oxygen. 
C)  organic. 
D)  oxate. 
E)  a salt.

Question 20

The maximum rate of an enzyme reaction

Accepted Answer

A)  occurs during dehydration. 
B)  occurs during hydrolysis. 
C)  occurs during synthesis. 
D)  is reversible. 
E)  occurs at the saturation limit. 
A)  occurs during dehydration. 
B)  occurs during hydrolysis. 
C)  occurs during synthesis. 
D)  is reversible. 
E)  occurs at the saturation limit.

Exam 2: The Chemical Level of Organization

Ions in an ionic molecule are held together due to

Lipids

A fatty acid with no double bonds between carbon atoms is

What role do buffer systems play in the human body?

Mucins are a type of ________ that absorb water to form mucus.

In an aqueous solution, sodium ions would move toward

Which of the following substances would be most acidic?

Which of these lists contains only trace elements?

Muddy lake water is an example of a(n)

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

Which of the following functional groups is the carboxyl group?

Chemical reactions that absorb energy are called

Hydrophilic molecules readily associate with

Molecules that do not readily interact with water are called

Which of the following is not a cation?

Molecules that have the same molecular formula but different structural formulas are called

The alpha-helix and beta sheet are examples of ________ protein structure.

The molecule CO2 is known as

The molecule O2 is known as

The maximum rate of an enzyme reaction

An Introduction to Anatomy and Physiology

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, Nutrition, and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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