Question 1

Electrovalent and ionic bonds are the same.

Accepted Answer

A) True 
 B)False  True

Question 2

Which of the following bonds are the weakest?

Accepted Answer

A)  Ionic 
B)  Hydrogen 
C)  Electrovalent 
D)  Covalent 
A)  Ionic 
B)  Hydrogen 
C)  Electrovalent 
D)  Covalent B

Question 3

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  True

Question 4

Water acts as a very effective solvent.

Accepted Answer

A) True 
 B)False

Question 5

Radioactivity can cause an atom of one element to change to that of another element.

Accepted Answer

A) True 
 B)False

Question 6

ATP is broken down in an anabolic reaction.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

Hydrogen bonds form as a result of the attraction between polar molecules.

Accepted Answer

A) True 
 B)False

Question 9

Atoms become positively charged by gaining protons.

Accepted Answer

A) True 
 B)False

Question 10

Chemical bonds formed by the sharing of electrons are called:

Accepted Answer

A)  ionic. 
B)  covalent. 
C)  hydrogen. 
D)  isotopic. 
A)  ionic. 
B)  covalent. 
C)  hydrogen. 
D)  isotopic.

Question 11

Inorganic compounds do not play an important role in living systems.

Accepted Answer

A) True 
 B)False

Question 12

An example of an element would be:

Accepted Answer

A)  Ne. 
B)  CO₂. 
C)  C₆H₁₂O₆. 
D)  H₂O. 
A)  Ne. 
B)  CO₂. 
C)  C₆H₁₂O₆. 
D)  H₂O.

Question 13

Electrolytes dissociate to form ions.

Accepted Answer

A) True 
 B)False

Question 14

A molecule that is polar:

Accepted Answer

A)  can form a hydrogen bond. 
B)  must be ionic. 
C)  has an unequal charge. 
D)  is both A and C. 
A)  can form a hydrogen bond. 
B)  must be ionic. 
C)  has an unequal charge. 
D)  is both A and C.

Question 15

As the hydrogen ion concentration increases, the pH value increases.

Accepted Answer

A) True 
 B)False

Question 16

The process of the digestion of food is an example of which type of reaction?

Accepted Answer

A)  Synthesis 
B)  Decomposition 
C)  Exchange 
D)  Reversible 
A)  Synthesis 
B)  Decomposition 
C)  Exchange 
D)  Reversible

Question 17

Hydrogen will react with other atoms to get eight electrons in its outer energy level.

Accepted Answer

A) True 
 B)False

Question 18

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _____ than _____.

Accepted Answer

A)  proton; electron 
B)  electron; proton 
C)  proton; neutron 
D)  electron; neutron 
A)  proton; electron 
B)  electron; proton 
C)  proton; neutron 
D)  electron; neutron

Question 19

The octet rule refers to the:

Accepted Answer

A)  stability of the nucleus when the protons are in a multiple of eight. 
B)  stability of the atom when there are eight electrons in the outermost energy level. 
C)  stable configuration of the nucleus when there are eight more neutrons than protons. 
D)  principle that one atom can combine with a maximum of eight other atoms. 
A)  stability of the nucleus when the protons are in a multiple of eight. 
B)  stability of the atom when there are eight electrons in the outermost energy level. 
C)  stable configuration of the nucleus when there are eight more neutrons than protons. 
D)  principle that one atom can combine with a maximum of eight other atoms.

Question 20

An ionic bond forms crystals whereas a covalent bond forms molecules.

Accepted Answer

A) True 
 B)False

Exam 3: Chemical Basis of Life

Electrovalent and ionic bonds are the same.

Which of the following bonds are the weakest?

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

Water acts as a very effective solvent.

Radioactivity can cause an atom of one element to change to that of another element.

ATP is broken down in an anabolic reaction.

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

Hydrogen bonds form as a result of the attraction between polar molecules.

Atoms become positively charged by gaining protons.

Chemical bonds formed by the sharing of electrons are called:

Inorganic compounds do not play an important role in living systems.

An example of an element would be:

Electrolytes dissociate to form ions.

A molecule that is polar:

As the hydrogen ion concentration increases, the pH value increases.

The process of the digestion of food is an example of which type of reaction?

Hydrogen will react with other atoms to get eight electrons in its outer energy level.

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _____ than _____.

The octet rule refers to the:

An ionic bond forms crystals whereas a covalent bond forms molecules.

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

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _ than _.