Question 1

Select the most accurate description of an atom.

Accepted Answer

A)  A nucleus of neutrons orbited by protons. 
B)  A nucleus of neutrons and protons orbited by electrons. 
C)  A nucleus of electrons orbited by neutrons and protons. 
D)  Protons orbiting around electrons. 
A)  A nucleus of neutrons orbited by protons. 
B)  A nucleus of neutrons and protons orbited by electrons. 
C)  A nucleus of electrons orbited by neutrons and protons. 
D)  Protons orbiting around electrons.

Question 2

Water makes up about 33% of total body weight in humans.

Accepted Answer

A) True 
 B)False

Question 3

What is a nonpolar molecule?

Accepted Answer

A)  The atoms share the electrons equally 
B)  Ions that become neutral from bonding 
C)  Water is a nonpolar molecule 
D)  The atoms bond by neutrons instead of electrons 
A)  The atoms share the electrons equally 
B)  Ions that become neutral from bonding 
C)  Water is a nonpolar molecule 
D)  The atoms bond by neutrons instead of electrons

Question 4

What are the properties of water that are important to life?

Accepted Answer

1. Water is liquid at room temperature.

Question 5

Which of the following organic molecules can serve as a library of genetic information?

Accepted Answer

A)  Glucose 
B)  RNA 
C)  DNA 
D)  Phospholipid 
A)  Glucose 
B)  RNA 
C)  DNA 
D)  Phospholipid

Question 6

All the millions of different proteins are formed by just ____ amino acids.

Accepted Answer

The answer of All the millions of different proteins are...

Question 7

Which of the following have approximately the same mass?

Accepted Answer

A)  Protons and proteins 
B)  Neutrons and nuclei 
C)  Protons and neutrons 
D)  Protons and electrons 
A)  Protons and proteins 
B)  Neutrons and nuclei 
C)  Protons and neutrons 
D)  Protons and electrons

Question 8

Which of the following organic chemicals is the most abundant in your body?

Accepted Answer

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

Question 9

Which carbohydrate category does glucose belong to?

Accepted Answer

A)  Polysaccharide 
B)  Disaccharide 
C)  Monosaccharide 
D)  Glycogen 
A)  Polysaccharide 
B)  Disaccharide 
C)  Monosaccharide 
D)  Glycogen

Question 10

An imbalance of the common ions found in the human body is life threatening.

Accepted Answer

A) True 
 B)False

Question 11

What does the number 6 mean in this diagram?

Accepted Answer

A)  The weight of a carbon atom 
B)  The number of protons in a carbon atom 
C)  The number of electrons in a carbon ion 
D)  How many bonds carbon will form 
A)  The weight of a carbon atom 
B)  The number of protons in a carbon atom 
C)  The number of electrons in a carbon ion 
D)  How many bonds carbon will form

Question 12

Since carbon has 4 electrons in the outer energy level, it can form 4 covalent bonds.

Accepted Answer

A) True 
 B)False

Question 13

The atomic mass is calculated by:

Accepted Answer

A)  adding the mass of the neutrons and protons. 
B)  subtracting the mass of electrons from the mass of the protons. 
C)  weighing individual atoms on microscales. 
D)  multiplying the mass of neutrons by the mass of the protons. 
A)  adding the mass of the neutrons and protons. 
B)  subtracting the mass of electrons from the mass of the protons. 
C)  weighing individual atoms on microscales. 
D)  multiplying the mass of neutrons by the mass of the protons.

Question 14

The positively charged particle labeled A is called a(n) ____.

Accepted Answer

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

Question 15

What kind of bond is indicated by the arrow in this diagram?

Accepted Answer

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

Question 16

The arrow is pointing to a pH that is:

Accepted Answer

A)  acidic. 
B)  neutral. 
C)  basic. 
D)  a buffer. 
A)  acidic. 
B)  neutral. 
C)  basic. 
D)  a buffer.

Question 17

Which element is the most common in humans?

Accepted Answer

A)  Chloride 
B)  Phosphorus 
C)  Hydrogen 
D)  Sulfur 
A)  Chloride 
B)  Phosphorus 
C)  Hydrogen 
D)  Sulfur

Question 18

The bond holding NaCl together is a(n):

Accepted Answer

A)  covalent bond. 
B)  ionic bond. 
C)  hydrogen bond. 
D)  salt bond. 
A)  covalent bond. 
B)  ionic bond. 
C)  hydrogen bond. 
D)  salt bond.

Question 19

What is the name of the bond shown here?

Accepted Answer

A)  Hydrogen 
B)  Polar covalent 
C)  Ionic 
D)  Van der Waals forces 
A)  Hydrogen 
B)  Polar covalent 
C)  Ionic 
D)  Van der Waals forces

Question 20

Which type of organic molecule is pictured here?

Accepted Answer

A)  Carbohydrate 
B)  Lipid 
C)  Nucleic acid 
D)  Protein 
A)  Carbohydrate 
B)  Lipid 
C)  Nucleic acid 
D)  Protein

Exam 3: Everyday Chemistry of Life

Select the most accurate description of an atom.

Water makes up about 33% of total body weight in humans.

What is a nonpolar molecule?

What are the properties of water that are important to life?

Which of the following organic molecules can serve as a library of genetic information?

All the millions of different proteins are formed by just ____ amino acids.

Which of the following have approximately the same mass?

Which of the following organic chemicals is the most abundant in your body?

Which carbohydrate category does glucose belong to?

An imbalance of the common ions found in the human body is life threatening.

What does the number 6 mean in this diagram?

Since carbon has 4 electrons in the outer energy level, it can form 4 covalent bonds.

The atomic mass is calculated by:

The positively charged particle labeled A is called a(n) ____.

What kind of bond is indicated by the arrow in this diagram?

The arrow is pointing to a pH that is:

Which element is the most common in humans?

The bond holding NaCl together is a(n):

What is the name of the bond shown here?

Which type of organic molecule is pictured here?

What Is Life

Where Do We Come From and Where Do We Fit

Cells: Organization and Communication

Tissues

The Skeletomuscular System

The Nervous System

The Special Senses

Immunity and the Lymphatic System

Infectious Disease and Epidemiology

The Human Microbiome

Cancer

The Cardiovascular System

The Respiratory System: Movement of Air

Nutrition: You Are What You Eat

The Digestive System

The Urinary System

The Endocrine System and Development

The Reproductive Systems: Maintaining the Species

Pregnancy: Development From Conception to Newborn

Inheritance, Genetics, and Molecular Biology

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