Question 1

The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in molesper liter.

Accepted Answer

A)  charge 
B)  pH 
C)  solubility 
D)  acidity 
E)  basicity 
A)  charge 
B)  pH 
C)  solubility 
D)  acidity 
E)  basicity

Question 2

Substrate molecules bind to enzymes at the ________ sites.

Accepted Answer

A)  amino 
B)  active 
C)  carboxyl 
D)  reactant 
E)  neutral 
A)  amino 
B)  active 
C)  carboxyl 
D)  reactant 
E)  neutral

Question 3

The reaction HCl ? H+ + Cl- is what type of reaction?

Accepted Answer

A)  decomposition 
B)  exchange 
C)  hydrolysis 
D)  synthesis 
E)  reversible 
A)  decomposition 
B)  exchange 
C)  hydrolysis 
D)  synthesis 
E)  reversible

Question 4

Isotopes of an element differ in the number of

Accepted Answer

A)  protons in the nucleus. 
B)  electrons in the nucleus. 
C)  neutrons in the nucleus. 
D)  electron clouds. 
E)  electrons in energy shells. 
A)  protons in the nucleus. 
B)  electrons in the nucleus. 
C)  neutrons in the nucleus. 
D)  electron clouds. 
E)  electrons in energy shells.

Question 5

In hydrolysis reactions, compounds react with

Accepted Answer

A)  hydrogen, causing decomposition. 
B)  glucose, causing decomposition. 
C)  water, causing decomposition. 
D)  carbon, causing decomposition. 
E)  water, causing synthesis. 
A)  hydrogen, causing decomposition. 
B)  glucose, causing decomposition. 
C)  water, causing decomposition. 
D)  carbon, causing decomposition. 
E)  water, causing synthesis.

Question 6

To bond two monomers together, a molecule of water must be ________ to/from monomers. This process is called ________.

Accepted Answer

A)  added; hydrolysis 
B)  removed; dehydration synthesis 
C)  removed; crenation 
D)  added; denaturation 
E)  added; ionization 
A)  added; hydrolysis 
B)  removed; dehydration synthesis 
C)  removed; crenation 
D)  added; denaturation 
E)  added; ionization

Question 7

The center of an atom is called the

Accepted Answer

A)  core. 
B)  hub. 
C)  middle point. 
D)  nucleus. 
E)  focus. 
A)  core. 
B)  hub. 
C)  middle point. 
D)  nucleus. 
E)  focus.

Question 8

One mole of any element has the same

Accepted Answer

A)  mass. 
B)  weight. 
C)  number of atoms. 
D)  number of electrons. 
E)  All of the answers are correct. 
A)  mass. 
B)  weight. 
C)  number of atoms. 
D)  number of electrons. 
E)  All of the answers are correct.

Question 9

H2O is an example of a(n)

Accepted Answer

A)  ionic formula. 
B)  glucose molecule. 
C)  compound. 
D)  ion. 
E)  covalent formula. 
A)  ionic formula. 
B)  glucose molecule. 
C)  compound. 
D)  ion. 
E)  covalent formula.

Question 10

Adenine and guanine are

Accepted Answer

A)  purines represented by T and C. 
B)  pyrimidines represented by A and G. 
C)  purines represented by A and G. 
D)  pyrimidines represented by T and C. 
E)  nucleotides represented by A and G. 
A)  purines represented by T and C. 
B)  pyrimidines represented by A and G. 
C)  purines represented by A and G. 
D)  pyrimidines represented by T and C. 
E)  nucleotides represented by A and G.

Question 11

A solution containing equal numbers of hydrogen ions and hydroxide ions is

Accepted Answer

A)  acidic. 
B)  basic. 
C)  neutral. 
D)  alkaline. 
E)  in equilibrium. 
A)  acidic. 
B)  basic. 
C)  neutral. 
D)  alkaline. 
E)  in equilibrium.

Question 12

In tertiary structure the ________ bond is formed between two cysteine amino acids.

Accepted Answer

A)  hydrophilic 
B)  hydrophobic 
C)  hydrogen 
D)  ionic 
E)  disulfide 
A)  hydrophilic 
B)  hydrophobic 
C)  hydrogen 
D)  ionic 
E)  disulfide

Question 13

In a molecule of nitrogen, three pairs of electrons are shared by two nitrogen atoms. The type of bond thatis formed is an example of a ________ bond.

Accepted Answer

A)  single trivalent 
B)  double divalent 
C)  triple covalent 
D)  polar covalent 
E)  hydrogen 
A)  single trivalent 
B)  double divalent 
C)  triple covalent 
D)  polar covalent 
E)  hydrogen

Question 14

Given the following approximate values, calculate the molecular weight for NaCl. Atomic number for Na: 11, Atomic weight for Na: 23 g/mol, Atomic number for Cl: 17,Atomic weight for Cl: 35 g/mol, Boiling point for Cl: -34 °C

Accepted Answer

A)  11 g/mol 
B)  28 g/mol 
C)  34 g/mol 
D)  40 g/mol 
E)  58 g/mol 
A)  11 g/mol 
B)  28 g/mol 
C)  34 g/mol 
D)  40 g/mol 
E)  58 g/mol

Question 15

Helium (HE) has an atomic number of 2. It is chemically stable because it

Accepted Answer

A)  is neutral in electrical charge. 
B)  readily ionizes to react with other atoms. 
C)  has a full outer electron shell. 
D)  will form a covalent bond with another He atom. 
E)  lacks electrons, thus the He atom is stable. 
A)  is neutral in electrical charge. 
B)  readily ionizes to react with other atoms. 
C)  has a full outer electron shell. 
D)  will form a covalent bond with another He atom. 
E)  lacks electrons, thus the He atom is stable.

Question 16

The nucleus of an atom consists of

Accepted Answer

A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  protons + neutrons. 
E)  protons + electrons. 
A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  protons + neutrons. 
E)  protons + electrons.

Question 17

Which of the following statements about water is false?

Accepted Answer

A)  It is composed of polar molecules. 
B)  It is responsible for much of the mass of the human body. 
C)  It has a relatively low heat capacity. 
D)  It can dissolve many substances. 
E)  It contains hydrogen bonds. 
A)  It is composed of polar molecules. 
B)  It is responsible for much of the mass of the human body. 
C)  It has a relatively low heat capacity. 
D)  It can dissolve many substances. 
E)  It contains hydrogen bonds.

Question 18

The most important metabolic fuel molecule in the body is

Accepted Answer

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

Question 19

The chemical notation that indicates concentration is represented as

Accepted Answer

A)  (). 
B)  . 
C)  [ ]. 
D)  {}. 
E)  ||. 
A)  (). 
B)  . 
C)  [ ]. 
D)  {}. 
E)  ||.

Question 20

Oxygen (atomic number 8) requires how many additional electrons to fill its outer electron shell?

Accepted Answer

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

Exam 2: The Chemical Level of Organization

The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in molesper liter.

Substrate molecules bind to enzymes at the ________ sites.

The reaction HCl ? H+ + Cl- is what type of reaction?

Isotopes of an element differ in the number of

In hydrolysis reactions, compounds react with

To bond two monomers together, a molecule of water must be ________ to/from monomers. This process is called ________.

The center of an atom is called the

One mole of any element has the same

H2O is an example of a(n)

Adenine and guanine are

A solution containing equal numbers of hydrogen ions and hydroxide ions is

In tertiary structure the ________ bond is formed between two cysteine amino acids.

In a molecule of nitrogen, three pairs of electrons are shared by two nitrogen atoms. The type of bond thatis formed is an example of a ________ bond.

Given the following approximate values, calculate the molecular weight for NaCl. Atomic number for Na: 11, Atomic weight for Na: 23 g/mol, Atomic number for Cl: 17,Atomic weight for Cl: 35 g/mol, Boiling point for Cl: -34 °C

Helium (HE) has an atomic number of 2. It is chemically stable because it

The nucleus of an atom consists of

Which of the following statements about water is false?

The most important metabolic fuel molecule in the body is

The chemical notation that indicates concentration is represented as

Oxygen (atomic number 8) requires how many additional electrons to fill its outer electron shell?

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

Filters

To bond two monomers together, a molecule of water must be to/from monomers. This process is called .