Question 1

What does the letter A represent in this diagram?

Accepted Answer

A) Enzyme 
B) Energy 
C) Products 
D) Substrates 
A) Enzyme 
B) Energy 
C) Products 
D) Substrates

Question 2

What kind of a bond is depicted in this diagram?

Accepted Answer

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

Question 3

The atomic number equals:

Accepted Answer

A) the number of electrons 
B) the number of protons 
C) the mass of the protons 
D) the number of neutrons 
A) the number of electrons 
B) the number of protons 
C) the mass of the protons 
D) the number of neutrons

Question 4

What does the letter C represent in this diagram?

Accepted Answer

A) Enzyme 
B) Product 
C) Substrate 
D) Acid 
A) Enzyme 
B) Product 
C) Substrate 
D) Acid

Question 5

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 6

Sweating is a good example of which of water's properties?

Accepted Answer

A) It is cohesive. 
B) It is a good solvent. 
C) It has a high heat of vaporization. 
D) It has a high specific heat. 
A) It is cohesive. 
B) It is a good solvent. 
C) It has a high heat of vaporization. 
D) It has a high specific heat.

Question 7

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 8

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 9

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

Accepted Answer

A) True 
 B)False

Question 10

A change in which ion concentration would severely affect heart rate and the nervous system?

Accepted Answer

A) Bicarbonate 
B) Sodium 
C) Potassium 
D) Chloride 
A) Bicarbonate 
B) Sodium 
C) Potassium 
D) Chloride

Question 11

Lye is a basic substance.

Accepted Answer

A) True 
 B)False

Question 12

Hydrogen bonds hold the hydrogen and oxygen together in water molecules.

Accepted Answer

A) True 
 B)False

Question 13

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 14

Which of the following is an element?

Accepted Answer

A) Carbohydrates 
B) Lipids 
C) H₂O 
D) Carbon 
A) Carbohydrates 
B) Lipids 
C) H₂O 
D) Carbon

Question 15

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 16

What makes an acid different from a base?

Accepted Answer

A) Acids contain more hydrogen ions than hydroxide ions. 
B) Acids have a pH of 7 or greater. 
C) Acids taste sweet. 
D) Acids have equal amounts of hydrogen and hydroxide ions. 
A) Acids contain more hydrogen ions than hydroxide ions. 
B) Acids have a pH of 7 or greater. 
C) Acids taste sweet. 
D) Acids have equal amounts of hydrogen and hydroxide ions.

Question 17

Exothermic reactions like burning hydrogen fuel release energy.

Accepted Answer

A) True 
 B)False

Question 18

Which collection of elements are the most common in living organisms?

Accepted Answer

A) Oxygen, carbon, hydrogen, and nitrogen 
B) Oxygen, sulfur, nitrogen, and carbon 
C) Carbon, hydrogen, neon, and nitrogen 
D) Oxygen, hydrogen, neon, and sulfur 
A) Oxygen, carbon, hydrogen, and nitrogen 
B) Oxygen, sulfur, nitrogen, and carbon 
C) Carbon, hydrogen, neon, and nitrogen 
D) Oxygen, hydrogen, neon, and sulfur

Question 19

Which type of lipid is a key component of the cell membrane?

Accepted Answer

A) Steroid 
B) Phospholipid 
C) Triglyceride 
D) Fatty acid 
A) Steroid 
B) Phospholipid 
C) Triglyceride 
D) Fatty acid

Question 20

A positively charged ion is formed when an atom gains electrons.

Accepted Answer

A) True 
 B)False

Exam 3: Life Has a Unique Chemistry

What does the letter A represent in this diagram?

What kind of a bond is depicted in this diagram?

The atomic number equals:

What does the letter C represent in this diagram?

The arrow is pointing to a pH that is:

Sweating is a good example of which of water's properties?

Select the most accurate description of an atom.

What is a nonpolar molecule?

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

A change in which ion concentration would severely affect heart rate and the nervous system?

Lye is a basic substance.

Hydrogen bonds hold the hydrogen and oxygen together in water molecules.

Which carbohydrate category does glucose belong to?

Which of the following is an element?

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

What makes an acid different from a base?

Exothermic reactions like burning hydrogen fuel release energy.

Which collection of elements are the most common in living organisms?

Which type of lipid is a key component of the cell membrane?

A positively charged ion is formed when an atom gains electrons.

What Is Life

Where Do We Come From and Where Do We Fit

Organization and Communication

Tissues

The Skeletomuscular System

The Nervous System

The Special Senses

Immunity and the Lymphatic System

Infectious Disease and Epidemiology

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

Populations Evolve in Ecosystems

Filters