Question 1

Turns blue litmus paper red

Accepted Answer

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

Question 2

A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain _____ protons, _____ neutrons, and _____ electrons.

Accepted Answer

A)  12; 25; 2 
B)  12; 13; 14 
C)  12; 13; 10 
D)  Not enough information is given to answer the question. 
A)  12; 25; 2 
B)  12; 13; 14 
C)  12; 13; 10 
D)  Not enough information is given to answer the question.

Question 3

Atomic weight is determined by the number of:

Accepted Answer

A)  protons and electrons. 
B)  neutrons and electrons. 
C)  neutrons, protons, and electrons. 
D)  protons and neutrons. 
A)  protons and electrons. 
B)  neutrons and electrons. 
C)  neutrons, protons, and electrons. 
D)  protons and neutrons.

Question 4

Which of the following is not one of the major groups of organic substances in the human body?

Accepted Answer

A)  Proteins 
B)  Salts 
C)  Lipids 
D)  Nucleic acids 
A)  Proteins 
B)  Salts 
C)  Lipids 
D)  Nucleic acids

Question 5

Electrolytes include acids, bases, and salts.

Accepted Answer

A) True 
 B)False

Question 6

Name and describe the types of radiation discussed in the chapter.

Accepted Answer

In the chapter, we discussed three main

Question 7

The study of metabolism includes examination of:

Accepted Answer

A)  catabolism. 
B)  anabolism. 
C)  ATP requirements. 
D)  all of the above. 
A)  catabolism. 
B)  anabolism. 
C)  ATP requirements. 
D)  all of the above.

Question 8

The positively charged electrons are found in clouds outside the nucleus of an atom.

Accepted Answer

A) True 
 B)False

Question 9

The chemical reaction of an acid with a base will produce a salt and water.

Accepted Answer

A) True 
 B)False

Question 10

During catabolic reactions, some of the energy is released as heat to help keep the body warm.

Accepted Answer

A) True 
 B)False

Question 11

Ionic bonds are chemical bonds formed by the:

Accepted Answer

A)  sharing of electrons between molecules. 
B)  donation of protons from one atom to another. 
C)  transfer of electrons from one atom to another. 
D)  acceptance of neutrons from one atom by another. 
A)  sharing of electrons between molecules. 
B)  donation of protons from one atom to another. 
C)  transfer of electrons from one atom to another. 
D)  acceptance of neutrons from one atom by another.

Question 12

Turns red litmus paper blue

Accepted Answer

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

Question 13

Tastes sour

Accepted Answer

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

Question 14

A weak acid:

Accepted Answer

A)  dissociates very little in solution. 
B)  dissociates almost completely in solution. 
C)  will cause the pH of the solution to rise above 7. 
D)  does both B and C. 
A)  dissociates very little in solution. 
B)  dissociates almost completely in solution. 
C)  will cause the pH of the solution to rise above 7. 
D)  does both B and C.

Question 15

A substance that resists changes in pH when acids or bases are added is called a buffer.

Accepted Answer

A) True 
 B)False

Question 16

The total number of electrons in a neutral atom equals the number of:

Accepted Answer

A)  neutrons orbiting the atom. 
B)  protons plus the number of neutrons in its nucleus. 
C)  protons in its nucleus. 
D)  ions in its nucleus. 
A)  neutrons orbiting the atom. 
B)  protons plus the number of neutrons in its nucleus. 
C)  protons in its nucleus. 
D)  ions in its nucleus.

Question 17

As the concentration of hydroxide ions (OH-) increases, the:

Accepted Answer

A)  solution becomes more basic. 
B)  solution becomes more acidic. 
C)  pH rises. 
D)  Both A and C are correct. 
A)  solution becomes more basic. 
B)  solution becomes more acidic. 
C)  pH rises. 
D)  Both A and C are correct.

Question 18

Because oxygen has eight electrons, it has achieved its octet and will not react with other elements.

Accepted Answer

A) True 
 B)False

Question 19

For sodium to transform from a neutral atom to a positive ion, it must:

Accepted Answer

A)  gain an electron. 
B)  gain a proton. 
C)  lose an electron. 
D)  lose a proton. 
A)  gain an electron. 
B)  gain a proton. 
C)  lose an electron. 
D)  lose a proton.

Question 20

When atoms combine, they may gain, lose, or share:

Accepted Answer

A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  nuclei. 
A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  nuclei.

Exam 3: Chemical Basis of Life

Turns blue litmus paper red

A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain _____ protons, _____ neutrons, and _____ electrons.

Atomic weight is determined by the number of:

Which of the following is not one of the major groups of organic substances in the human body?

Electrolytes include acids, bases, and salts.

Name and describe the types of radiation discussed in the chapter.

The study of metabolism includes examination of:

The positively charged electrons are found in clouds outside the nucleus of an atom.

The chemical reaction of an acid with a base will produce a salt and water.

During catabolic reactions, some of the energy is released as heat to help keep the body warm.

Ionic bonds are chemical bonds formed by the:

Turns red litmus paper blue

Tastes sour

A weak acid:

A substance that resists changes in pH when acids or bases are added is called a buffer.

The total number of electrons in a neutral atom equals the number of:

As the concentration of hydroxide ions (OH-) increases, the:

Because oxygen has eight electrons, it has achieved its octet and will not react with other elements.

For sodium to transform from a neutral atom to a positive ion, it must:

When atoms combine, they may gain, lose, or share:

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 and Development

Genetics and Heredity

Filters

A magnesium atom has an atomic number of 12, an atomic mass of 25, and a ⁺² charge. This atom would contain ___ protons, _ neutrons, and ___ electrons.