Question 1

The first electron shell of an atom can hold a maximum of

Accepted Answer

A)  1 electron. 
B)  2 electrons. 
C)  4 electrons. 
D)  8 electrons. 
A)  1 electron. 
B)  2 electrons. 
C)  4 electrons. 
D)  8 electrons.

Question 2

The type of subatomic particle that does not have an electrical charge is a(n) ________.

Accepted Answer

The answer of The type of subatomic particle that does...

Question 3

In a covalent bond

Accepted Answer

A)  one atom loses and another atom gains electrons. 
B)  atoms share a pair or more of electrons. 
C)  oppositely charged atoms attract. 
D)  like-charged atoms repel. 
A)  one atom loses and another atom gains electrons. 
B)  atoms share a pair or more of electrons. 
C)  oppositely charged atoms attract. 
D)  like-charged atoms repel.

Question 4

In the body, oxygen

Accepted Answer

A)  reacts with water to form carbonic acid. 
B)  is used during cellular respiration. 
C)  is a major electrolyte. 
D)  is produced by cells. 
A)  reacts with water to form carbonic acid. 
B)  is used during cellular respiration. 
C)  is a major electrolyte. 
D)  is produced by cells.

Question 5

On the pH scale

Accepted Answer

A)  a tenfold difference in hydrogen ion concentration separates each whole number. 
B)  the lower the whole number on the scale, the greater the H+ concentration. 
C)  pH values above 7 are basic (alkaline). 
D)  all of the above. 
A)  a tenfold difference in hydrogen ion concentration separates each whole number. 
B)  the lower the whole number on the scale, the greater the H+ concentration. 
C)  pH values above 7 are basic (alkaline). 
D)  all of the above.

Question 6

Which of the following is characteristic of carbohydrates?

Accepted Answer

A)  They contain C, H, O, with twice as many hydrogen as oxygen atoms. 
B)  They provide much of the energy that the cell requires. 
C)  They include sugars and starches. 
D)  all of the above. 
A)  They contain C, H, O, with twice as many hydrogen as oxygen atoms. 
B)  They provide much of the energy that the cell requires. 
C)  They include sugars and starches. 
D)  all of the above.

Question 7

Which of the following substances is an element?

Accepted Answer

A)  Iron 
B)  Water 
C)  Sodium chloride 
D)  Glucose 
A)  Iron 
B)  Water 
C)  Sodium chloride 
D)  Glucose

Question 8

Chemistry is the study of the composition of matter and how matter changes.

Accepted Answer

A) True 
 B)False

Question 9

An acid is an electrolyte that releases hydroxide ions (OH-) in water.

Accepted Answer

A) True 
 B)False

Question 10

Proteins

Accepted Answer

A)  are structural materials. 
B)  can function as enzymes. 
C)  contain C, H, O, and N, and sometimes S. 
D)  all of the above. 
A)  are structural materials. 
B)  can function as enzymes. 
C)  contain C, H, O, and N, and sometimes S. 
D)  all of the above.

Question 11

Carbon can form ___ covalent bonds.

Accepted Answer

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

Question 12

The informational content of DNA and RNA is in the nitrogenous bases because

Accepted Answer

A)  the bases are of several types and therefore can form a code sequence. 
B)  they all contain nitrogen. 
C)  the sugars and phosphates vary. 
D)  the bases are also parts of amino acids. 
A)  the bases are of several types and therefore can form a code sequence. 
B)  they all contain nitrogen. 
C)  the sugars and phosphates vary. 
D)  the bases are also parts of amino acids.

Question 13

Chemistry deals with

Accepted Answer

A)  the composition and changes of substances that make up living as well as non-living matter. 
B)  the composition and changes of substances found in organisms only. 
C)  the composition of and changes of substances that make up non-living matter only. 
D)  the location of organs in body cavities. 
A)  the composition and changes of substances that make up living as well as non-living matter. 
B)  the composition and changes of substances found in organisms only. 
C)  the composition of and changes of substances that make up non-living matter only. 
D)  the location of organs in body cavities.

Question 14

Water is an example of a compound.

Accepted Answer

A) True 
 B)False

Question 15

The opposite of a decomposition reaction is a _____ reaction.

Accepted Answer

The answer of The opposite of a decomposition reaction is...

Question 16

Glycogen is a complex carbohydrate that we get directly by eating plants.

Accepted Answer

A) True 
 B)False

Question 17

A substance that releases hydrogen ions in water is a base.

Accepted Answer

A) True 
 B)False

Question 18

DNA

Accepted Answer

A)  is a protein. 
B)  plays no role in the synthesis of fats. 
C)  stores genetic information, including instructions for enzymes that synthesize fats and carbohydrates. 
D)  is routinely broken down to provide cellular energy. 
A)  is a protein. 
B)  plays no role in the synthesis of fats. 
C)  stores genetic information, including instructions for enzymes that synthesize fats and carbohydrates. 
D)  is routinely broken down to provide cellular energy.

Question 19

An electrolyte ionizes in water.

Accepted Answer

A) True 
 B)False

Question 20

Lipids

Accepted Answer

A)  are insoluble in water. 
B)  include phospholipids, cholesterol, and fats. 
C)  contain C, H, and O, but with proportionately less oxygen than in carbohydrates. 
D)  all of the above. 
A)  are insoluble in water. 
B)  include phospholipids, cholesterol, and fats. 
C)  contain C, H, and O, but with proportionately less oxygen than in carbohydrates. 
D)  all of the above.

Exam 2: Chemical Basis of Life

The first electron shell of an atom can hold a maximum of

The type of subatomic particle that does not have an electrical charge is a(n) ________.

In a covalent bond

In the body, oxygen

On the pH scale

Which of the following is characteristic of carbohydrates?

Which of the following substances is an element?

Chemistry is the study of the composition of matter and how matter changes.

An acid is an electrolyte that releases hydroxide ions (OH-) in water.

Proteins

Carbon can form ___ covalent bonds.

The informational content of DNA and RNA is in the nitrogenous bases because

Chemistry deals with

Water is an example of a compound.

The opposite of a decomposition reaction is a _____ reaction.

Glycogen is a complex carbohydrate that we get directly by eating plants.

A substance that releases hydrogen ions in water is a base.

DNA

An electrolyte ionizes in water.

Lipids

Introduction to Human Anatomy and Physiology

Cells

Cellular Metabolism

Tissues

Integumentary System

Skeletal System

Joints of the Skeletal System

Muscular System

Nervous System I: Basic Structure and Function

Nervous System II: Division of the Nervous System

Nervous System III: Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Digestive System

Nutrition and Metabolism

Respiratory System

Urinary System

Water, Electrolyte, and Acid-Based Balance

Reproductive Systems

Pregnancy, Growth, and Development

Genetics and Genomics

Filters

An acid is an electrolyte that releases hydroxide ions (OH^-) in water.