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

In water,phospholipids tend to form tiny droplets with hydrophobic tails buried inside called

Accepted Answer

A) micelles. 
B) chylomicrons. 
C) glycocalyces. 
D) eicosanoids. 
E) hydroceles. 
A) micelles. 
B) chylomicrons. 
C) glycocalyces. 
D) eicosanoids. 
E) hydroceles.

Question 3

Which of the following statements about hydrogen bonds is false?

Accepted Answer

A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms. 
B) Hydrogen bonds can occur within a single molecule. 
C) Hydrogen bonds can form between neighboring molecules. 
D) Hydrogen bonds are important for holding large molecules together. 
E) Hydrogen bonds are responsible for many of the properties of water. 
A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms. 
B) Hydrogen bonds can occur within a single molecule. 
C) Hydrogen bonds can form between neighboring molecules. 
D) Hydrogen bonds are important for holding large molecules together. 
E) Hydrogen bonds are responsible for many of the properties of water.

Question 4

Explain the role of water molecules in polysaccharide formation.

Accepted Answer

Water molecules are

Question 5

Magnesium atoms have two electrons in the outermost shell.As a result,you would expect magnesium to form ions with a charge of

Accepted Answer

A) +1. 
B) +2. 
C) -1. 
D) -2. 
E) either +2 or -2. 
A) +1. 
B) +2. 
C) -1. 
D) -2. 
E) either +2 or -2.

Question 6

Individual steroids differ in the ________ attached to the carbon rings.

Accepted Answer

A) side chains 
B) glycerol molecules 
C) hydrophobic tails 
D) hydrophilic heads 
E) fatty acids 
A) side chains 
B) glycerol molecules 
C) hydrophobic tails 
D) hydrophilic heads 
E) fatty acids

Question 7

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 8

Compounds that contain carbon as the primary structural atom are called ________ molecules.

Accepted Answer

A) carbonic 
B) organic 
C) inorganic 
D) catabolic 
E) anabolic 
A) carbonic 
B) organic 
C) inorganic 
D) catabolic 
E) anabolic

Question 9

A nucleotide consists of a

Accepted Answer

A) five-carbon sugar and phosphate group. 
B) five-carbon sugar and a nitrogenous base. 
C) phosphate group and a nitrogenous base. 
D) five-carbon sugar,a nitrogenous base,and a phosphate group. 
E) five-carbon sugar and an amino acid. 
A) five-carbon sugar and phosphate group. 
B) five-carbon sugar and a nitrogenous base. 
C) phosphate group and a nitrogenous base. 
D) five-carbon sugar,a nitrogenous base,and a phosphate group. 
E) five-carbon sugar and an amino acid.

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

By weight,which element is the most plentiful in the human body?

Accepted Answer

A) sulfur 
B) sodium 
C) oxygen 
D) potassium 
E) carbon 
A) sulfur 
B) sodium 
C) oxygen 
D) potassium 
E) carbon

Question 12

The three familiar states of matter are solids,liquids,and

Accepted Answer

A) globules. 
B) fibroids. 
C) gases. 
D) crystals. 
E) vapors. 
A) globules. 
B) fibroids. 
C) gases. 
D) crystals. 
E) vapors.

Question 13

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 14

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 15

Electrons in an atom occupy an orderly series of electron shells or

Accepted Answer

A) energy levels. 
B) electron clouds. 
C) energy circles. 
D) electron lanes. 
E) energy fields. 
A) energy levels. 
B) electron clouds. 
C) energy circles. 
D) electron lanes. 
E) energy fields.

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

The molecule NO is known as

Accepted Answer

A) nitric oxide. 
B) noxious oxide. 
C) noxious oxygen. 
D) nitric oxygen. 
E) nitrous oxide. 
A) nitric oxide. 
B) noxious oxide. 
C) noxious oxygen. 
D) nitric oxygen. 
E) nitrous oxide.

Question 18

In an ionic bond,the electron donor is the ________,whereas the electron acceptor is the ________.

Accepted Answer

A) acid; base 
B) salt; ion 
C) anion; cation 
D) base; acid 
E) cation; anion 
A) acid; base 
B) salt; ion 
C) anion; cation 
D) base; acid 
E) cation; anion

Question 19

Soluble inorganic compounds whose solutions will conduct an electric current are called

Accepted Answer

A) electrolytes. 
B) ions. 
C) isotopes. 
D) free radicals. 
E) metabolites. 
A) electrolytes. 
B) ions. 
C) isotopes. 
D) free radicals. 
E) metabolites.

Question 20

When electrons are transferred from one atom to another,and the two atoms unite as a result of the opposite charges,a(n)________ is formed.

Accepted Answer

A) ion 
B) molecule 
C) hydrogen bond 
D) ionic bond 
E) covalent bond 
A) ion 
B) molecule 
C) hydrogen bond 
D) ionic bond 
E) covalent bond

Exam 2: The Chemical Level of Organization

Ions in an ionic molecule are held together due to

In water,phospholipids tend to form tiny droplets with hydrophobic tails buried inside called

Which of the following statements about hydrogen bonds is false?

Explain the role of water molecules in polysaccharide formation.

Magnesium atoms have two electrons in the outermost shell.As a result,you would expect magnesium to form ions with a charge of

Individual steroids differ in the ________ attached to the carbon rings.

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

Compounds that contain carbon as the primary structural atom are called ________ molecules.

A nucleotide consists of a

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

By weight,which element is the most plentiful in the human body?

The three familiar states of matter are solids,liquids,and

The molecule O₂ is known as

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

Electrons in an atom occupy an orderly series of electron shells or

The nucleus of an atom consists of

The molecule NO is known as

In an ionic bond,the electron donor is the ________,whereas the electron acceptor is the ________.

Soluble inorganic compounds whose solutions will conduct an electric current are called

When electrons are transferred from one atom to another,and the two atoms unite as a result of the opposite charges,a(n)________ is formed.

An Introduction to Anatomy and Physiology

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Neural 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 and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

In an ionic bond,the electron donor is the ,whereas the electron acceptor is the .