Question 1

In ionic bonding,

Accepted Answer

A)  electrons are transferred from one atom to another. 
B)  the charge of the ion does not play a role in the bond. 
C)  only non-polar molecules are involved. 
D)  two hydrogen atoms share one pair of electrons. 
E)  a "sea of electrons" forms. 
A)  electrons are transferred from one atom to another. 
B)  the charge of the ion does not play a role in the bond. 
C)  only non-polar molecules are involved. 
D)  two hydrogen atoms share one pair of electrons. 
E)  a "sea of electrons" forms.

Question 2

If the ratio of products and reactants are stable, the system is in _______.

Accepted Answer

A)  activation 
B)  steady state 
C)  equilibrium 
A)  activation 
B)  steady state 
C)  equilibrium

Question 3

Which of the following organic groups does hemoglobin belong to?

Accepted Answer

A)  nucleic acid 
B)  vitamin 
C)  lipid 
D)  protein 
E)  carbohydrate 
A)  nucleic acid 
B)  vitamin 
C)  lipid 
D)  protein 
E)  carbohydrate

Question 4

Electrons

Accepted Answer

A)  are the subatomic particles most involved in bonding behavior of atoms. 
B)  have a positive charge of one. 
C)  comprise the majority of the mass of an atom. 
D)  do not participate in the bonding of atoms. 
E)  are located in the nucleus of an atom. 
A)  are the subatomic particles most involved in bonding behavior of atoms. 
B)  have a positive charge of one. 
C)  comprise the majority of the mass of an atom. 
D)  do not participate in the bonding of atoms. 
E)  are located in the nucleus of an atom.

Question 5

-Phospholipids are important components of the plasma membrane. What does "E" represent on the diagram?

Accepted Answer

A)  phosphorus 
B)  oxygen 
C)  nitrogen 
D)  polar (hydrophilic) region 
E)  nonpolar (hydrophobic) region 
A)  phosphorus 
B)  oxygen 
C)  nitrogen 
D)  polar (hydrophilic) region 
E)  nonpolar (hydrophobic) region

Question 6

Which of the following is an organic compound?

Accepted Answer

A)  hydrochloric acid (HCl) 
B)  salt (NaCl) 
C)  sucrose (C12H22O11) 
D)  water (H2O) 
E)  None of these choices are correct. 
A)  hydrochloric acid (HCl) 
B)  salt (NaCl) 
C)  sucrose (C12H22O11) 
D)  water (H2O) 
E)  None of these choices are correct.

Question 7

Which of the following chemical reactions best represents the decomposition of ATP?

Accepted Answer

A)  ATP + ADP $\rightarrow$ATP 
B)  ATP + energy $\rightarrow$ ADP + H2O 
C)  ATP + H2O $\rightarrow$ ADP + Pi + energy 
D)  ADP + ADP + ADP$\rightarrow$ ATP 
E)  ADP + Pi + energy $\rightarrow$ ATP + H2O 
A)  ATP + ADP $\rightarrow$ATP 
B)  ATP + energy $\rightarrow$ ADP + H2O 
C)  ATP + H2O $\rightarrow$ ADP + Pi + energy 
D)  ADP + ADP + ADP$\rightarrow$ ATP 
E)  ADP + Pi + energy $\rightarrow$ ATP + H2O

Question 8

Which of the following is the correct complementary strand to CATGTC?

Accepted Answer

A)  GUACAG 
B)  TCGTAT 
C)  CATGTC 
D)  GTACAG 
E)  AGCACA 
A)  GUACAG 
B)  TCGTAT 
C)  CATGTC 
D)  GTACAG 
E)  AGCACA

Question 9

Identify the material that would NOT be considered an important inorganic substances in our bodies.

Accepted Answer

A)  carbon 
B)  iron 
C)  calcium 
D)  oxygen 
A)  carbon 
B)  iron 
C)  calcium 
D)  oxygen

Question 10

DNA

Accepted Answer

A)  contains the sugar deoxyribose. 
B)  assembles amino acids to make proteins.. 
C)  is one of several amino acids. 
D)  must travel to ribosomes to function. 
E)  is a single-stranded molecule. 
A)  contains the sugar deoxyribose. 
B)  assembles amino acids to make proteins.. 
C)  is one of several amino acids. 
D)  must travel to ribosomes to function. 
E)  is a single-stranded molecule.

Question 11

The three forms of matter are:

Accepted Answer

A)  air, water, and solids. 
B)  solids, liquids, and gases. 
C)  blood, bone, and air. 
D)  vapor, water, and solid. 
A)  air, water, and solids. 
B)  solids, liquids, and gases. 
C)  blood, bone, and air. 
D)  vapor, water, and solid.

Question 12

A substance that will increase the rate of a chemical reaction without being permanently changed is called a/an

Accepted Answer

A)  oxidator. 
B)  reducing agent. 
C)  catalyst. 
D)  solute. 
A)  oxidator. 
B)  reducing agent. 
C)  catalyst. 
D)  solute.

Question 13

In the reversible reaction, CO2 + H2O $\harr$H2CO3 $\harr$H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Accepted Answer

A)  H+ will decrease. 
B)  H+ will increase. 
C)  H+ will be unchanged. 
A)  H+ will decrease. 
B)  H+ will increase. 
C)  H+ will be unchanged.

Question 14

Which of the following organic groups does DNA belong to?

Accepted Answer

A)  protein 
B)  lipid 
C)  nucleic acid 
D)  carbohydrate 
E)  vitamin 
A)  protein 
B)  lipid 
C)  nucleic acid 
D)  carbohydrate 
E)  vitamin

Question 15

What molecule is produced as a waste product of the metabolism of glucose by cells?

Accepted Answer

A)  water 
B)  oxygen 
C)  carbon monoxide 
D)  nitrogen 
E)  carbon dioxide 
A)  water 
B)  oxygen 
C)  carbon monoxide 
D)  nitrogen 
E)  carbon dioxide

Question 16

Which of the following nitrogen bases is found in RNA but not DNA?

Accepted Answer

A)  cytosine 
B)  adenine 
C)  thymine 
D)  uracil 
E)  guanine 
A)  cytosine 
B)  adenine 
C)  thymine 
D)  uracil 
E)  guanine

Question 17

A cation is

Accepted Answer

A)  a molecule that conducts electricity when placed in solution. 
B)  an alteration in the three-dimensional structure of a protein. 
C)  a positively charged ion. 
D)  a combination of atoms held together by chemical bonds. 
E)  a negatively charged ion. 
A)  a molecule that conducts electricity when placed in solution. 
B)  an alteration in the three-dimensional structure of a protein. 
C)  a positively charged ion. 
D)  a combination of atoms held together by chemical bonds. 
E)  a negatively charged ion.

Question 18

X-rays can be used to view bones because

Accepted Answer

A)  x-rays can not pass through bone. 
B)  x-rays pass through bone. 
C)  x-rays react with bone. 
D)  bones are less dense than soft tissue. 
A)  x-rays can not pass through bone. 
B)  x-rays pass through bone. 
C)  x-rays react with bone. 
D)  bones are less dense than soft tissue.

Question 19

Solution A increases its acidity. This means that the

Accepted Answer

A)  pH of the solution has increased. 
B)  number of hydrogen ions has increased. 
C)  solution is closer to neutrality. 
D)  solution will now accept more protons. 
E)  number of hydrogen ions has decreased. 
A)  pH of the solution has increased. 
B)  number of hydrogen ions has increased. 
C)  solution is closer to neutrality. 
D)  solution will now accept more protons. 
E)  number of hydrogen ions has decreased.

Question 20

A buffer will

Accepted Answer

A)  enhance changes in the pH of the solutions. 
B)  make a solution more acidic. 
C)  make a solution more basic. 
D)  have no effect on the pH of the solutions. 
E)  resist drastic changes in the pH of the solutions. 
A)  enhance changes in the pH of the solutions. 
B)  make a solution more acidic. 
C)  make a solution more basic. 
D)  have no effect on the pH of the solutions. 
E)  resist drastic changes in the pH of the solutions.

Exam 2: The Chemical Basis of Life

In ionic bonding,

If the ratio of products and reactants are stable, the system is in _______.

Which of the following organic groups does hemoglobin belong to?

Electrons

-Phospholipids are important components of the plasma membrane. What does "E" represent on the diagram?

Which of the following is an organic compound?

Which of the following chemical reactions best represents the decomposition of ATP?

Which of the following is the correct complementary strand to CATGTC?

Identify the material that would NOT be considered an important inorganic substances in our bodies.

DNA

The three forms of matter are:

A substance that will increase the rate of a chemical reaction without being permanently changed is called a/an

In the reversible reaction, CO2 + H2O ↔\harr↔ H2CO3 ↔\harr↔ H+ + HCO3- , a decrease in respiration rate will increase the concentration of CO2 in the blood. What will this do to the amount of H+ in the blood?

Which of the following organic groups does DNA belong to?

What molecule is produced as a waste product of the metabolism of glucose by cells?

Which of the following nitrogen bases is found in RNA but not DNA?

A cation is

X-rays can be used to view bones because

Solution A increases its acidity. This means that the

A buffer will

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolyte, and Acid-Based Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

In the reversible reaction, CO₂ + H₂O $\harr$ H₂CO₃ $\harr$ H⁺ + HCO₃- , a decrease in respiration rate will increase the concentration of CO₂ in the blood. What will this do to the amount of H⁺ in the blood?