Question 1

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 C

Question 2

Why is this organic molecule important in living organisms?

Accepted Answer

A) Structural component for most parts of a cell 
B) Stores genetic information 
C) Insulation 
D) Biological energy 
A) Structural component for most parts of a cell 
B) Stores genetic information 
C) Insulation 
D) Biological energy D

Question 3

Water's high specific heat makes it:

Accepted Answer

A) a good temperature buffer. 
B) a good solvent. 
C) liquid at room temperature. 
D) easy to boil. 
A) a good temperature buffer. 
B) a good solvent. 
C) liquid at room temperature. 
D) easy to boil. A

Question 4

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 5

The negatively charged particle labeled C is called a(n)________.

Accepted Answer

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

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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 8

Which of the following is considered a base?

Accepted Answer

A) Ammonia 
B) Lemon juice 
C) Vinegar 
D) Stomach acid 
A) Ammonia 
B) Lemon juice 
C) Vinegar 
D) Stomach acid

Question 9

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 10

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

Question 11

How are starch and cellulose different?

Accepted Answer

A) They are actually the same chemical known by two different names. 
B) The branching pattern is different. 
C) Animals make cellulose. 
D) Plants use only starch. 
A) They are actually the same chemical known by two different names. 
B) The branching pattern is different. 
C) Animals make cellulose. 
D) Plants use only starch.

Question 12

Using the numbers given in the diagram,how many neutrons does a carbon atom have?

Accepted Answer

A) 4 
B) 6 
C) 18 
D) 72 
A) 4 
B) 6 
C) 18 
D) 72

Question 13

Which bond is the weakest?

Accepted Answer

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

Question 14

Hydrogen is not an atom because it does not have any neutrons.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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 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

Which of the following would dissolve most easily in water?

Accepted Answer

A) Fat 
B) Salt 
C) Oil 
D) Butter 
A) Fat 
B) Salt 
C) Oil 
D) Butter

Question 19

What would happen if the active site of an enzyme had a different shape?

Accepted Answer

A) Nothing would change 
B) The process would happen in reverse 
C) The enzyme would die 
D) The enzyme would not be functional 
A) Nothing would change 
B) The process would happen in reverse 
C) The enzyme would die 
D) The enzyme would not be functional

Question 20

Which description of Ca²⁺ is most accurate?

Accepted Answer

A) A positive ion that has lost 2 electrons. 
B) A positive ion that has gained 2 protons. 
C) An isotope with 2 extra neutrons. 
D) An atom that has gained 2 electrons. 
A) A positive ion that has lost 2 electrons. 
B) A positive ion that has gained 2 protons. 
C) An isotope with 2 extra neutrons. 
D) An atom that has gained 2 electrons.

Exam 3: Life Has a Unique Chemistry

Which of the following have approximately the same mass?

Why is this organic molecule important in living organisms?

Water's high specific heat makes it:

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

The negatively charged particle labeled C is called a(n)________.

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

The bond holding NaCl together is a(n):

Which of the following is considered a base?

The atomic mass is calculated by:

Which type of organic molecule is pictured here?

How are starch and cellulose different?

Using the numbers given in the diagram,how many neutrons does a carbon atom have?

Which bond is the weakest?

Hydrogen is not an atom because it does not have any neutrons.

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

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

Which element is the most common in humans?

Which of the following would dissolve most easily in water?

What would happen if the active site of an enzyme had a different shape?

Which description of Ca²⁺ is most accurate?

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

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