Question 1

In DNA, thymine binds with adenine and cytosine binds with uracil.

Accepted Answer

A) True 
 B)False

Question 2

Twelve grams of C contain the same number of atoms as one gram of H.

Accepted Answer

A) True 
 B)False

Question 3

What directly determines an atom's identity?

Accepted Answer

A)  the number of electrons 
B)  the number of neutrons 
C)  the number of protons 
D)  the number of bonds it can form 
E)  the ratio of protons to electrons 
A)  the number of electrons 
B)  the number of neutrons 
C)  the number of protons 
D)  the number of bonds it can form 
E)  the ratio of protons to electrons

Question 4

Of these major ions found in the body, which one carries a negative charge?

Accepted Answer

A)  Chloride 
B)  Sodium 
C)  Potassium 
D)  Hydrogen 
E)  Calcium 
A)  Chloride 
B)  Sodium 
C)  Potassium 
D)  Hydrogen 
E)  Calcium

Question 5

In general, polar molecules will dissolve in polar solvents, while nonpolar molecules cannot.

Accepted Answer

A) True 
 B)False

Question 6

Cholesterol is a phospholipid.

Accepted Answer

A) True 
 B)False

Question 7

Which best describes the main role of adenosine triphosphate (ATP)?

Accepted Answer

A)  It is an amino acid that is part of polypeptide chains that serve structural functions within cells. 
B)  It is a nucleotide that makes up the backbone of DNA and RNA molecules, that harbor the genetic code. 
C)  It is a carbohydrate molecule that can be stored in large quantities in the liver to energize cellular processes. 
D)  It is a purine derivative created from the breakdown of fuel molecules, that transfers energy for cellular processes. 
E)  It is a waste product of aerobic metabolism that is excreted from the body by the kidneys. 
A)  It is an amino acid that is part of polypeptide chains that serve structural functions within cells. 
B)  It is a nucleotide that makes up the backbone of DNA and RNA molecules, that harbor the genetic code. 
C)  It is a carbohydrate molecule that can be stored in large quantities in the liver to energize cellular processes. 
D)  It is a purine derivative created from the breakdown of fuel molecules, that transfers energy for cellular processes. 
E)  It is a waste product of aerobic metabolism that is excreted from the body by the kidneys.

Question 8

The sequence of amino acids in a protein is known as the secondary structure.

Accepted Answer

A) True 
 B)False

Question 9

All covalent bonds are polar.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is NOT a type of molecular interaction that determines the tertiary structure of a protein?

Accepted Answer

A)  covalent bonds between purines and pyrimidine bases 
B)  ionic bonds 
C)  Van der Waals forces 
D)  covalent bonds between two cysteine amino acids 
E)  hydrogen bonds 
A)  covalent bonds between purines and pyrimidine bases 
B)  ionic bonds 
C)  Van der Waals forces 
D)  covalent bonds between two cysteine amino acids 
E)  hydrogen bonds

Question 11

When multiple repeating simple sugar molecules combine to form a larger molecule, it is called a polysaccharide.

Accepted Answer

A) True 
 B)False

Question 12

Which chemical group does glucose best fit into?

Accepted Answer

A)  monosaccharides 
B)  disaccharides 
C)  polysaccharides 
D)  glycoproteins 
E)  phospholipids 
A)  monosaccharides 
B)  disaccharides 
C)  polysaccharides 
D)  glycoproteins 
E)  phospholipids

Question 13

Saturated fats contain carbon atoms linked by double bonds.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is not true of a polar chemical bond?

Accepted Answer

A)  It is covalent. 
B)  It is ionized. 
C)  It has opposite electrical charge at each end. 
D)  It has no net electrical charge. 
A)  It is covalent. 
B)  It is ionized. 
C)  It has opposite electrical charge at each end. 
D)  It has no net electrical charge.

Question 15

The atomic number of an element refers to the number of particles in its atomic nucleus.

Accepted Answer

A) True 
 B)False

Question 16

Which describes a characteristic of free radicals?

Accepted Answer

A)  They rapidly oxidize other atoms by removing an electron. 
B)  They are inert molecules that don't interact readily with other molecules. 
C)  They contain two electrons in the outermost orbital. 
D)  They have extra neutrons in their nuclei. 
E)  They are found in high quantities in most sports drinks. 
A)  They rapidly oxidize other atoms by removing an electron. 
B)  They are inert molecules that don't interact readily with other molecules. 
C)  They contain two electrons in the outermost orbital. 
D)  They have extra neutrons in their nuclei. 
E)  They are found in high quantities in most sports drinks.

Question 17

Eicosanoids are an important class of regulatory molecules; what chemical class do they belong to?

Accepted Answer

A)  steroids 
B)  proteins 
C)  carbohydrates 
D)  fatty acids 
E)  amino acids 
A)  steroids 
B)  proteins 
C)  carbohydrates 
D)  fatty acids 
E)  amino acids

Question 18

If a sports beverage advertises that it replaces the body's electrolytes, what does the drink contain?

Accepted Answer

A)  sugars that were broken down for energy 
B)  ionic forms of mineral elements 
C)  lipids that form the membranes of cells 
D)  oxygen and gases used by metabolism 
E)  vitamins 
A)  sugars that were broken down for energy 
B)  ionic forms of mineral elements 
C)  lipids that form the membranes of cells 
D)  oxygen and gases used by metabolism 
E)  vitamins

Question 19

Molecules that have properties of both polar and nonpolar molecules are called

Accepted Answer

A)  hydrophobic. 
B)  hydrophilic. 
C)  amphipathic. 
D)  unipolar. 
E)  bipolar. 
A)  hydrophobic. 
B)  hydrophilic. 
C)  amphipathic. 
D)  unipolar. 
E)  bipolar.

Question 20

Which is true about the composition of organic molecules?

Accepted Answer

A)  They always contain oxygen. 
B)  They always contain carbon. 
C)  They are always macromolecules. 
D)  They never contain hydrogen. 
E)  They never contain oxygen. 
A)  They always contain oxygen. 
B)  They always contain carbon. 
C)  They are always macromolecules. 
D)  They never contain hydrogen. 
E)  They never contain oxygen.

In DNA, thymine binds with adenine and cytosine binds with uracil.

Twelve grams of C contain the same number of atoms as one gram of H.

What directly determines an atom's identity?

Of these major ions found in the body, which one carries a negative charge?

In general, polar molecules will dissolve in polar solvents, while nonpolar molecules cannot.

Cholesterol is a phospholipid.

Which best describes the main role of adenosine triphosphate (ATP)?

The sequence of amino acids in a protein is known as the secondary structure.

All covalent bonds are polar.

Which of the following is NOT a type of molecular interaction that determines the tertiary structure of a protein?

When multiple repeating simple sugar molecules combine to form a larger molecule, it is called a polysaccharide.

Which chemical group does glucose best fit into?

Saturated fats contain carbon atoms linked by double bonds.

Which of the following is not true of a polar chemical bond?

The atomic number of an element refers to the number of particles in its atomic nucleus.

Which describes a characteristic of free radicals?

Eicosanoids are an important class of regulatory molecules; what chemical class do they belong to?

If a sports beverage advertises that it replaces the body's electrolytes, what does the drink contain?

Molecules that have properties of both polar and nonpolar molecules are called

Which is true about the composition of organic molecules?

Homeostasis: a Framework for Human Physiology

Cellular Structure, Proteins, and Metabolic Pathways

Movement of Molecules Across Cell Membranes

Cell Signaling in Physiology

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

Control of Body Movement

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Filters

Exam 2: Chemical Composition of the Body and Its Relation to Physiology

In DNA, thymine binds with adenine and cytosine binds with uracil.

Twelve grams of C contain the same number of atoms as one gram of H.

What directly determines an atom's identity?

Of these major ions found in the body, which one carries a negative charge?

In general, polar molecules will dissolve in polar solvents, while nonpolar molecules cannot.

Cholesterol is a phospholipid.

Which best describes the main role of adenosine triphosphate (ATP)?

The sequence of amino acids in a protein is known as the secondary structure.

All covalent bonds are polar.

Which of the following is NOT a type of molecular interaction that determines the tertiary structure of a protein?

When multiple repeating simple sugar molecules combine to form a larger molecule, it is called a polysaccharide.

Which chemical group does glucose best fit into?

Saturated fats contain carbon atoms linked by double bonds.

Which of the following is not true of a polar chemical bond?

The atomic number of an element refers to the number of particles in its atomic nucleus.

Which describes a characteristic of free radicals?

Eicosanoids are an important class of regulatory molecules; what chemical class do they belong to?

If a sports beverage advertises that it replaces the body's electrolytes, what does the drink contain?

Molecules that have properties of both polar and nonpolar molecules are called

Which is true about the composition of organic molecules?

Homeostasis: a Framework for Human Physiology

Cellular Structure, Proteins, and Metabolic Pathways

Movement of Molecules Across Cell Membranes

Cell Signaling in Physiology

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

Control of Body Movement

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Filters