Question 1

In the reaction listed below,what coefficient needs to be added to balance the equation? 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + ________ O₂

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 10 
A) 2 
B) 4 
C) 6 
D) 8 
E) 10

Question 2

Radioisotopes have unstable

Accepted Answer

A) ions. 
B) nuclei. 
C) isotopes. 
D) electron clouds. 
E) protons. 
A) ions. 
B) nuclei. 
C) isotopes. 
D) electron clouds. 
E) protons.

Question 3

Hydrophilic molecules readily associate with

Accepted Answer

A) lipid molecules. 
B) hydrophobic molecules. 
C) water molecules. 
D) acids. 
E) salts. 
A) lipid molecules. 
B) hydrophobic molecules. 
C) water molecules. 
D) acids. 
E) salts.

Question 4

The center of an atom is called the ________.

Accepted Answer

The answer of The center of an atom is called...

Question 5

An example of an organic substance is:

Accepted Answer

A) sucrose 
B) carbonic acid 
C) sodium chloride 
D) oxygen 
E) nitric oxide 
A) sucrose 
B) carbonic acid 
C) sodium chloride 
D) oxygen 
E) nitric oxide

Question 6

Helium (He)has an atomic number of 2. It is chemically stable because it

Accepted Answer

A) is neutral in electrical charge. 
B) readily ionizes to react with other atoms. 
C) has a full outer electron shell. 
D) will form a covalent bond with another He atom. 
E) lacks electrons,thus the He atom is stable. 
A) is neutral in electrical charge. 
B) readily ionizes to react with other atoms. 
C) has a full outer electron shell. 
D) will form a covalent bond with another He atom. 
E) lacks electrons,thus the He atom is stable.

Question 7

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 8

According to the rules of complementary base pairing in nucleic acids,cytosine would pair with the base

Accepted Answer

A) thymine. 
B) adenine. 
C) uracil. 
D) cytosine. 
E) guanine. 
A) thymine. 
B) adenine. 
C) uracil. 
D) cytosine. 
E) guanine.

Question 9

The most abundant high-energy compound in cells is

Accepted Answer

A) DNA. 
B) adenosine diphosphate. 
C) adenosine monophosphate. 
D) adenosine triphosphate. 
E) RNA. 
A) DNA. 
B) adenosine diphosphate. 
C) adenosine monophosphate. 
D) adenosine triphosphate. 
E) RNA.

Question 10

Which one of the following statements is not correct about the reaction H₂ + Cl₂ → 2 HCl?

Accepted Answer

A) H₂ and Cl₂ are the reactants. 
B) HCl is the product. 
C) One molecule of hydrogen contains two atoms. 
D) Two molecules of HCl are formed in the reaction. 
E) This reaction is easily reversible. 
A) H₂ and Cl₂ are the reactants. 
B) HCl is the product. 
C) One molecule of hydrogen contains two atoms. 
D) Two molecules of HCl are formed in the reaction. 
E) This reaction is easily reversible.

Question 11

If an isotope of oxygen has 8 protons,10 neutrons,and 8 electrons,its mass number is

Accepted Answer

A) 26. 
B) 16. 
C) 18. 
D) 8) 
E) 12. 
A) 26. 
B) 16. 
C) 18. 
D) 8) 
E) 12.

Question 12

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

Accepted Answer

The answer of Compounds that contain carbon as the primary...

Question 13

All of the following are true concerning enzymes,except that they

Accepted Answer

A) are proteins. 
B) function as biological catalysts. 
C) lower the activation energy required for a reaction. 
D) affect only the rate of a chemical reaction. 
E) are consumed during the reaction. 
A) are proteins. 
B) function as biological catalysts. 
C) lower the activation energy required for a reaction. 
D) affect only the rate of a chemical reaction. 
E) are consumed during the reaction.

Question 14

Ions with a negative charge are called ________.

Accepted Answer

The answer of Ions with a negative charge are called...

Question 15

In living cells,complex metabolic reactions proceed in a series of steps called a(n)________.

Accepted Answer

The answer of In living cells,complex metabolic reactions proceed in...

Question 16

Most of the fat found in the human body is in the form of

Accepted Answer

A) cholesterol. 
B) phospholipids. 
C) triglycerides. 
D) prostaglandins. 
E) monoglycerides. 
A) cholesterol. 
B) phospholipids. 
C) triglycerides. 
D) prostaglandins. 
E) monoglycerides.

Question 17

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Accepted Answer

A) inorganic compounds. 
B) organic compounds. 
C) nutrients. 
D) metabolites. 
E) enzymes. 
A) inorganic compounds. 
B) organic compounds. 
C) nutrients. 
D) metabolites. 
E) enzymes.

Question 18

Oppositely charged ions in solution are prevented from combining by

Accepted Answer

A) heat capacity of water. 
B) hydration spheres. 
C) water's nonpolar nature. 
D) free radicals. 
E) hydrogen bonding. 
A) heat capacity of water. 
B) hydration spheres. 
C) water's nonpolar nature. 
D) free radicals. 
E) hydrogen bonding.

Question 19

When electrons are transferred from one atom to another,and the two atoms unite as a result of the opposite charges,

Accepted Answer

A) an ion is formed. 
B) a molecule is formed. 
C) a hydrogen bond is formed. 
D) an ionic bond is formed. 
E) a covalent bond is formed. 
A) an ion is formed. 
B) a molecule is formed. 
C) a hydrogen bond is formed. 
D) an ionic bond is formed. 
E) a covalent bond is formed.

Question 20

A(n)________ is a pure substance composed of atoms of only one kind.

Accepted Answer

The answer of A(n)________ is a pure substance composed of...

Exam 2: The Chemical Level of Organization

In the reaction listed below,what coefficient needs to be added to balance the equation? 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + ________ O₂

Radioisotopes have unstable

Hydrophilic molecules readily associate with

The center of an atom is called the ________.

An example of an organic substance is:

Helium (He)has an atomic number of 2. It is chemically stable because it

Ions in an ionic molecule are held together due to

According to the rules of complementary base pairing in nucleic acids,cytosine would pair with the base

The most abundant high-energy compound in cells is

Which one of the following statements is not correct about the reaction H₂ + Cl₂ → 2 HCl?

If an isotope of oxygen has 8 protons,10 neutrons,and 8 electrons,its mass number is

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

All of the following are true concerning enzymes,except that they

Ions with a negative charge are called ________.

In living cells,complex metabolic reactions proceed in a series of steps called a(n)________.

Most of the fat found in the human body is in the form of

Compounds that can be synthesized or broken down by chemical reactions inside the body are called

Oppositely charged ions in solution are prevented from combining by

When electrons are transferred from one atom to another,and the two atoms unite as a result of the opposite charges,

A(n)________ is a pure substance composed of atoms of only one kind.

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

Articulations

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

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

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