Question 1

DNA and RNA are nucleic acids.

Accepted Answer

A) True 
 B)False

Question 2

Consider the following list of commonly found items and their pH values:   Which of the following choices includes all acids?

Accepted Answer

A)  Egg whites, baking soda, milk of magnesia, and bleach 
B)  Tomatoes, egg whites, and baking soda 
C)  Vinegar, grapes, tomatoes, and coffee 
D)  Beer, butter, and baking soda 
A)  Egg whites, baking soda, milk of magnesia, and bleach 
B)  Tomatoes, egg whites, and baking soda 
C)  Vinegar, grapes, tomatoes, and coffee 
D)  Beer, butter, and baking soda

Question 3

An acid reacting with a base is

Accepted Answer

A)  a synthesis reaction. 
B)  hydrolysis. 
C)  a decomposition reaction. 
D)  an exchange reaction. 
A)  a synthesis reaction. 
B)  hydrolysis. 
C)  a decomposition reaction. 
D)  an exchange reaction.

Question 4

An enzyme is a ____.

Accepted Answer

A)  protein that speeds up chemical reactions without being changed or depleted 
B)  protein that functions as a hormone 
C)  protein that inhibits chemical reactions by being changed or depleted 
D)  fibrous protein that is part of certain tissues in the body 
A)  protein that speeds up chemical reactions without being changed or depleted 
B)  protein that functions as a hormone 
C)  protein that inhibits chemical reactions by being changed or depleted 
D)  fibrous protein that is part of certain tissues in the body

Question 5

The parts of an atom that carry single negative electrical charges are called ________.

Accepted Answer

The answer of The parts of an atom that carry...

Question 6

Which of the following groups of elements accounts for more than 95% of the human body by weight?

Accepted Answer

A)  Carbon, hydrogen, oxygen, nitrogen 
B)  Calcium, hydrogen, oxygen, nitrogen 
C)  Carbon, phosphorus, oxygen, hydrogen 
D)  Calcium, phosphorus, hydrogen, nitrogen 
A)  Carbon, hydrogen, oxygen, nitrogen 
B)  Calcium, hydrogen, oxygen, nitrogen 
C)  Carbon, phosphorus, oxygen, hydrogen 
D)  Calcium, phosphorus, hydrogen, nitrogen

Question 7

Water causes ionically-bonded atoms to

Accepted Answer

A)  bond more strongly. 
B)  dissociate. 
C)  bond covalently. 
D)  decompose. 
A)  bond more strongly. 
B)  dissociate. 
C)  bond covalently. 
D)  decompose.

Question 8

In phenylketonuria, an individual cannot break down the amino acid phenylalanine. Molecules that include phenylalanine build up in the blood, which causes intellectual disability and other symptoms. This inherited disease can be controlled by following a diet that is very low in

Accepted Answer

A)  carbohydrates. 
B)  cholesterol. 
C)  protein. 
D)  nucleic acids. 
A)  carbohydrates. 
B)  cholesterol. 
C)  protein. 
D)  nucleic acids.

Question 9

Radioactive isotopes have stable nuclei.

Accepted Answer

A) True 
 B)False

Question 10

Saturated fats _______ than unsaturated fats.

Accepted Answer

A)  contain more water 
B)  have more glycerol 
C)  have more single carbon-carbon bonds 
D)  have fewer hydrogen atoms bonded to carbon atoms 
A)  contain more water 
B)  have more glycerol 
C)  have more single carbon-carbon bonds 
D)  have fewer hydrogen atoms bonded to carbon atoms

Question 11

A protein is formed from a sequence of amino acids.

Accepted Answer

A) True 
 B)False

Question 12

Matter is composed of elements, which are composed of _____.

Accepted Answer

A)  atoms 
B)  inorganic molecules 
C)  organic molecules 
D)  chemicals 
A)  atoms 
B)  inorganic molecules 
C)  organic molecules 
D)  chemicals

Question 13

A base is an electrolyte that releases ions that combine with hydrogen ions.

Accepted Answer

A) True 
 B)False

Question 14

The pH scale measures the

Accepted Answer

A)  concentration of hydrogen ions in solution. 
B)  number of molecules of salts dissolved in water. 
C)  number of hydroxide ions in water. 
D)  strength of an electrical current that a solution carries. 
A)  concentration of hydrogen ions in solution. 
B)  number of molecules of salts dissolved in water. 
C)  number of hydroxide ions in water. 
D)  strength of an electrical current that a solution carries.

Question 15

A complex carbohydrate consists of a phosphate group attached to a sugar molecule.

Accepted Answer

A) True 
 B)False

Question 16

The symbol Na+ represents a sodium atom that has lost an electron.

Accepted Answer

A) True 
 B)False

Question 17

____ has the unique ability among types of organic molecules to replicate.
or

Accepted Answer

DNA Deoxyr

Question 18

Electrolytes that release hydrogen ions in water are

Accepted Answer

A)  bases. 
B)  nucleotides. 
C)  acids. 
D)  electrons. 
A)  bases. 
B)  nucleotides. 
C)  acids. 
D)  electrons.

Question 19

A strong acid reacting with a strong base produces a salt.

Accepted Answer

A) True 
 B)False

Question 20

In an ionic bond

Accepted Answer

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

Exam 2: Chemical Basis of Life

DNA and RNA are nucleic acids.

Consider the following list of commonly found items and their pH values: Which of the following choices includes all acids?

An acid reacting with a base is

An enzyme is a ____.

The parts of an atom that carry single negative electrical charges are called ________.

Which of the following groups of elements accounts for more than 95% of the human body by weight?

Water causes ionically-bonded atoms to

In phenylketonuria, an individual cannot break down the amino acid phenylalanine. Molecules that include phenylalanine build up in the blood, which causes intellectual disability and other symptoms. This inherited disease can be controlled by following a diet that is very low in

Radioactive isotopes have stable nuclei.

Saturated fats _______ than unsaturated fats.

A protein is formed from a sequence of amino acids.

Matter is composed of elements, which are composed of _____.

A base is an electrolyte that releases ions that combine with hydrogen ions.

The pH scale measures the

A complex carbohydrate consists of a phosphate group attached to a sugar molecule.

The symbol Na+ represents a sodium atom that has lost an electron.

____ has the unique ability among types of organic molecules to replicate. or

Electrolytes that release hydrogen ions in water are

A strong acid reacting with a strong base produces a salt.

In an ionic bond

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

The symbol Na⁺ represents a sodium atom that has lost an electron.