Question 1

Electrons surround the nucleus of an atom in areas of probability rather than in defined orbits.

Accepted Answer

A) True 
 B)False

Question 2

The term that is used to describe all of the chemical reactions that occur in body cells is:

Accepted Answer

A) catabolism. 
B) metabolism. 
C) synthesis. 
D) anabolism. 
A) catabolism. 
B) metabolism. 
C) synthesis. 
D) anabolism.

Question 3

Water acts as a very effective solvent.

Accepted Answer

A) True 
 B)False

Question 4

Carbon has an atomic number of 6. The number of electrons found in the first shell is:

Accepted Answer

A) two. 
B) four. 
C) six. 
D) eight. 
A) two. 
B) four. 
C) six. 
D) eight.

Question 5

One of the functions of water in the body is that of helping to maintain a constant body temperature.

Accepted Answer

A) True 
 B)False

Question 6

A substance that releases an OH- ion in solution is called a base.

Accepted Answer

A) True 
 B)False

Question 7

Two shared pairs of electrons represent a single covalent bond.

Accepted Answer

A) True 
 B)False

Question 8

An ionic bond is formed by:

Accepted Answer

A) two or more positive ions combining. 
B) two or more negative ions combining. 
C) a positive and a negative ion attracting each other. 
D) sharing of a pair of electrons. 
A) two or more positive ions combining. 
B) two or more negative ions combining. 
C) a positive and a negative ion attracting each other. 
D) sharing of a pair of electrons.

Question 9

The atomic mass of an atom is equal to the number of protons plus the number of neutrons.

Accepted Answer

A) True 
 B)False

Question 10

Electrolytes dissociate to form ions.

Accepted Answer

A) True 
 B)False

Question 11

Gastric fluid, approximately a 1.5 on the pH scale

Accepted Answer

A)  Acid 
B)  Base 
A)  Acid 
B)  Base

Question 12

Sodium chloride is an example of an ionic bond.

Accepted Answer

A) True 
 B)False

Question 13

A + B « AB is an example of a(n) _____ reaction.

Accepted Answer

A) decomposition 
B) reversible 
C) exchange 
D) Both A and B are correct. 
A) decomposition 
B) reversible 
C) exchange 
D) Both A and B are correct.

Question 14

Which of the following represents properties of water?

Accepted Answer

A) High specific heat 
B) High heat of vaporization 
C) Strong polarity 
D) All of the above 
A) High specific heat 
B) High heat of vaporization 
C) Strong polarity 
D) All of the above

Question 15

Match each term to its corresponding descriptive phrase.
-Number of protons an atom has

Accepted Answer

A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds 
A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds

Question 16

A strong acid:

Accepted Answer

A) holds on strongly to its hydrogen atoms, releasing very few in solution. 
B) would cause a drop in the pH of a solution. 
C) would cause a rise in the pH of a solution. 
D) is both A and C. 
A) holds on strongly to its hydrogen atoms, releasing very few in solution. 
B) would cause a drop in the pH of a solution. 
C) would cause a rise in the pH of a solution. 
D) is both A and C.

Question 17

Litmus paper will turn red in the presence of a base.

Accepted Answer

A) True 
 B)False

Question 18

Match each term to its corresponding descriptive phrase.
-Bond formed between atoms when they share electrons

Accepted Answer

A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds 
A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds

Question 19

An example of a catabolic process is:

Accepted Answer

A) hydrolysis. 
B) dehydration synthesis. 
C) formation of a peptide bond. 
D) both B and C. 
A) hydrolysis. 
B) dehydration synthesis. 
C) formation of a peptide bond. 
D) both B and C.

Question 20

Hydrolysis _____ a water molecule.

Accepted Answer

A) joins compounds by removing 
B) breaks down compounds by removing 
C) joins compounds by adding 
D) breaks down compounds by adding 
A) joins compounds by removing 
B) breaks down compounds by removing 
C) joins compounds by adding 
D) breaks down compounds by adding

Exam 3: Chemistry of Life

Electrons surround the nucleus of an atom in areas of probability rather than in defined orbits.

The term that is used to describe all of the chemical reactions that occur in body cells is:

Water acts as a very effective solvent.

Carbon has an atomic number of 6. The number of electrons found in the first shell is:

One of the functions of water in the body is that of helping to maintain a constant body temperature.

A substance that releases an OH- ion in solution is called a base.

Two shared pairs of electrons represent a single covalent bond.

An ionic bond is formed by:

The atomic mass of an atom is equal to the number of protons plus the number of neutrons.

Electrolytes dissociate to form ions.

Gastric fluid, approximately a 1.5 on the pH scale

Sodium chloride is an example of an ionic bond.

A + B « AB is an example of a(n) _____ reaction.

Which of the following represents properties of water?

Match each term to its corresponding descriptive phrase. -Number of protons an atom has

A strong acid:

Litmus paper will turn red in the presence of a base.

Match each term to its corresponding descriptive phrase. -Bond formed between atoms when they share electrons

An example of a catabolic process is:

Hydrolysis _____ a water molecule.

Organization of the Body

Homeostasis

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Gas Exchange Transport

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

Female Reproductive System

Growth, Development, and Aging

Genetics and Heredity

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