Question 1

A neutral atom that has 22 protons could have 25 neutrons.

Accepted Answer

A) True 
 B)False

Question 2

Which type of radiation consists of two protons and two neutrons?

Accepted Answer

A)  Alpha 
B)  Beta 
C)  Delta 
D)  Gamma 
A)  Alpha 
B)  Beta 
C)  Delta 
D)  Gamma

Question 3

An ionic bond is formed by:

Accepted Answer

A)  two or more positive ions combining. 
B)  two or more negative ions combining. 
C)  a positive and a negative ion attracting each other. 
D)  sharing of a pair of electrons. 
A)  two or more positive ions combining. 
B)  two or more negative ions combining. 
C)  a positive and a negative ion attracting each other. 
D)  sharing of a pair of electrons.

Question 4

The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the human body?

Accepted Answer

A)  50% 
B)  69% 
C)  78% 
D)  96% 
A)  50% 
B)  69% 
C)  78% 
D)  96%

Question 5

A solution with a pH of 6 has 100 times more hydrogen ions than a solution with a pH of 4.

Accepted Answer

A) True 
 B)False

Question 6

When your body is building larger and more complex chemical molecules from smaller subunits, what is occurring?

Accepted Answer

A)  Anabolic reactions that expend energy 
B)  Anabolic reactions that require energy 
C)  Catabolic reactions that expend energy 
D)  Catabolic reactions that require energy 
A)  Anabolic reactions that expend energy 
B)  Anabolic reactions that require energy 
C)  Catabolic reactions that expend energy 
D)  Catabolic reactions that require energy

Question 7

Sodium chloride is an example of an ionic bond.

Accepted Answer

A) True 
 B)False

Question 8

A strong acid:

Accepted Answer

A)  holds on strongly to its hydrogen atoms, releasing very few in solution. 
B)  would cause a drop in the pH of a solution. 
C)  would cause a rise in the pH of a solution. 
D)  is both A and C. 
A)  holds on strongly to its hydrogen atoms, releasing very few in solution. 
B)  would cause a drop in the pH of a solution. 
C)  would cause a rise in the pH of a solution. 
D)  is both A and C.

Question 9

Match each term to its corresponding descriptive phrase.
-Bond that is formed by the transfer of an electron from one atom to another

Accepted Answer

A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds 
A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds

Question 10

The approximate pH of gastric fluid is:

Accepted Answer

A)  10. 
B)  8. 
C)  4. 
D)  2. 
A)  10. 
B)  8. 
C)  4. 
D)  2.

Question 11

Explain the role of buffers in maintaining the proper environment in which the body can function.

Accepted Answer

Buffers play a crucial role in maintaini

Question 12

Hydrolysis _____ a water molecule.

Accepted Answer

A)  joins compounds by removing 
B)  breaks down compounds by removing 
C)  joins compounds by adding 
D)  breaks down compounds by adding 
A)  joins compounds by removing 
B)  breaks down compounds by removing 
C)  joins compounds by adding 
D)  breaks down compounds by adding

Question 13

Which type of radiation consists of electromagnetic radiation, a form of light energy?

Accepted Answer

A)  Alpha 
B)  Beta 
C)  Delta 
D)  Gamma 
A)  Alpha 
B)  Beta 
C)  Delta 
D)  Gamma

Question 14

The formation of sucrose involves the removal of a molecule of water. This is called:

Accepted Answer

A)  hydrolysis. 
B)  oxidation. 
C)  decomposition. 
D)  dehydration synthesis. 
A)  hydrolysis. 
B)  oxidation. 
C)  decomposition. 
D)  dehydration synthesis.

Question 15

Two shared pairs of electrons represent a single covalent bond.

Accepted Answer

A) True 
 B)False

Question 16

AB + C→AD + CB is an example of a(n) _____ reaction.

Accepted Answer

A)  synthesis 
B)  exchange 
C)  decomposition 
D)  reversible 
A)  synthesis 
B)  exchange 
C)  decomposition 
D)  reversible

Question 17

A type of chemical reaction called dehydration synthesis is an example of an anabolic reaction.

Accepted Answer

A) True 
 B)False

Question 18

As the concentration of hydrogen ions (H⁺) 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 19

The idea that electrons are found in areas of probability distribution around the nucleus was first proposed by Niels Bohr.

Accepted Answer

A) True 
 B)False

Question 20

An isotope of an element contains different numbers of ____ from other atoms of the same element.

Accepted Answer

A)  electrons 
B)  protons 
C)  neutrons 
D)  both protons and neutrons 
A)  electrons 
B)  protons 
C)  neutrons 
D)  both protons and neutrons

Exam 3: Chemical Basis of Life

A neutral atom that has 22 protons could have 25 neutrons.

Which type of radiation consists of two protons and two neutrons?

An ionic bond is formed by:

The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the human body?

A solution with a pH of 6 has 100 times more hydrogen ions than a solution with a pH of 4.

When your body is building larger and more complex chemical molecules from smaller subunits, what is occurring?

Sodium chloride is an example of an ionic bond.

A strong acid:

Match each term to its corresponding descriptive phrase. -Bond that is formed by the transfer of an electron from one atom to another

The approximate pH of gastric fluid is:

Explain the role of buffers in maintaining the proper environment in which the body can function.

Hydrolysis _____ a water molecule.

Which type of radiation consists of electromagnetic radiation, a form of light energy?

The formation of sucrose involves the removal of a molecule of water. This is called:

Two shared pairs of electrons represent a single covalent bond.

AB + C→AD + CB is an example of a(n) _____ reaction.

A type of chemical reaction called dehydration synthesis is an example of an anabolic reaction.

As the concentration of hydrogen ions (H⁺) increases, the:

The idea that electrons are found in areas of probability distribution around the nucleus was first proposed by Niels Bohr.

An isotope of an element contains different numbers of ____ from other atoms of the same element.

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

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