Question 1

Which of the following is not organic?

Accepted Answer

A)  Sodium chloride 
B)  Lipids 
C)  Nucleic acids 
D)  Enzymes 
A)  Sodium chloride 
B)  Lipids 
C)  Nucleic acids 
D)  Enzymes A

Question 2

Nucleic acids are composed of building blocks called amino acids.

Accepted Answer

A) True 
 B)False  False

Question 3

The amino acid sequence of a protein is its __________ structure.

Accepted Answer

primary

Question 4

Which of the following is not a source of ionizing radiation?

Accepted Answer

A)  Cosmic rays from outer space 
B)  Cholesterol and triglycerides 
C)  Atomic and nuclear weapons 
D)  Smoke detectors 
A)  Cosmic rays from outer space 
B)  Cholesterol and triglycerides 
C)  Atomic and nuclear weapons 
D)  Smoke detectors

Question 5

A person with alkalosis has a blood pH less than 7.3.

Accepted Answer

A) True 
 B)False

Question 6

A complete atom is electrically neutral because

Accepted Answer

A)  the number of protons equals the number of neutrons. 
B)  the number of electrons equals the number of neutrons. 
C)  the number of electrons equals the number of protons. 
D)  electrons is greater than the number of protons. 
A)  the number of protons equals the number of neutrons. 
B)  the number of electrons equals the number of neutrons. 
C)  the number of electrons equals the number of protons. 
D)  electrons is greater than the number of protons.

Question 7

A chemical reaction in which parts of different molecules trade positions is a(n)

Accepted Answer

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

Question 8

Proteins encode nucleic acids.

Accepted Answer

A) True 
 B)False

Question 9

The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is

Accepted Answer

A)  twofold. 
B)  fivefold. 
C)  tenfold. 
D)  twentyfold. 
A)  twofold. 
B)  fivefold. 
C)  tenfold. 
D)  twentyfold.

Question 10

Exposure to ionizing radiation may

Accepted Answer

A)  cloud the lens of the eye. 
B)  cause cancer. 
C)  interfere with normal growth. 
D)  all of the above. 
A)  cloud the lens of the eye. 
B)  cause cancer. 
C)  interfere with normal growth. 
D)  all of the above.

Question 11

The number of protons in an atom of an element always equals its atomic weight.

Accepted Answer

A) True 
 B)False

Question 12

Two or more atoms bonding form a ________.

Accepted Answer

The answer of Two or more atoms bonding form a...

Question 13

Sodium and chloride atoms combine readily because they both lose electrons.

Accepted Answer

A) True 
 B)False

Question 14

Apricots have a pH of 3.8. Therefore, they are ______.
or

Accepted Answer

The answer of Apricots have a pH of 3.8. Therefore,...

Question 15

Nucleic acids include

Accepted Answer

A)  proteins and DNA. 
B)  RNA and DNA. 
C)  enzymes and RNA. 
D)  steroids and triglycerides. 
A)  proteins and DNA. 
B)  RNA and DNA. 
C)  enzymes and RNA. 
D)  steroids and triglycerides.

Question 16

Which of the following is(are) ionizing radiation?

Accepted Answer

A)  Cosmic radiation only 
B)  Gamma radiation only 
C)  Both cosmic radiation and gamma radiation 
D)  Neither cosmic nor gamma radiation 
A)  Cosmic radiation only 
B)  Gamma radiation only 
C)  Both cosmic radiation and gamma radiation 
D)  Neither cosmic nor gamma radiation

Question 17

A simple carbohydrate

Accepted Answer

A)  has a molecular formula of C6H12O6. 
B)  is a building block of protein. 
C)  consists of several joined chains. 
D)  has only one nucleotide. 
A)  has a molecular formula of C6H12O6. 
B)  is a building block of protein. 
C)  consists of several joined chains. 
D)  has only one nucleotide.

Question 18

The atomic number of an atom equals the number of ______ and the atomic weight equals the ____.

Accepted Answer

A)  neutrons; number of protons 
B)  protons; weight of all the electrons 
C)  neutrons; number of protons plus electrons 
D)  protons; number of protons plus neutrons 
A)  neutrons; number of protons 
B)  protons; weight of all the electrons 
C)  neutrons; number of protons plus electrons 
D)  protons; number of protons plus neutrons

Question 19

Nucleic acids are

Accepted Answer

A)  very small, simple molecules. 
B)  structural molecules that have no function other than support. 
C)  composed of building blocks called nucleotides. 
D)  primary sources of cellular energy. 
A)  very small, simple molecules. 
B)  structural molecules that have no function other than support. 
C)  composed of building blocks called nucleotides. 
D)  primary sources of cellular energy.

Question 20

Which of the following groups of compounds is hydrophobic?

Accepted Answer

A)  Carbohydrates 
B)  Lipids 
C)  Proteins 
D)  Nucleic Acids 
A)  Carbohydrates 
B)  Lipids 
C)  Proteins 
D)  Nucleic Acids

Exam 2: Chemical Basis of Life

Which of the following is not organic?

Nucleic acids are composed of building blocks called amino acids.

The amino acid sequence of a protein is its __________ structure.

Which of the following is not a source of ionizing radiation?

A person with alkalosis has a blood pH less than 7.3.

A complete atom is electrically neutral because

A chemical reaction in which parts of different molecules trade positions is a(n)

Proteins encode nucleic acids.

The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is

Exposure to ionizing radiation may

The number of protons in an atom of an element always equals its atomic weight.

Two or more atoms bonding form a ________.

Sodium and chloride atoms combine readily because they both lose electrons.

Apricots have a pH of 3.8. Therefore, they are ______. or

Nucleic acids include

Which of the following is(are) ionizing radiation?

A simple carbohydrate

The atomic number of an atom equals the number of ______ and the atomic weight equals the ____.

Nucleic acids are

Which of the following groups of compounds is hydrophobic?

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 atomic number of an atom equals the number of __ and the atomic weight equals the .