Question 1

Which of the following statements about hydrogen bonds is false?

Accepted Answer

A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms. 
B) Hydrogen bonds can occur within a single molecule. 
C) Hydrogen bonds can form between neighboring molecules. 
D) Hydrogen bonds are important for holding large molecules together. 
E) Hydrogen bonds are responsible for many of the properties of water. 
A) Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms. 
B) Hydrogen bonds can occur within a single molecule. 
C) Hydrogen bonds can form between neighboring molecules. 
D) Hydrogen bonds are important for holding large molecules together. 
E) Hydrogen bonds are responsible for many of the properties of water. A

Question 2

During ionization,water molecules disrupt the ionic bonds of a salt to produce a mixture of ions.These ions can carry a current and so are called

Accepted Answer

A) cations. 
B) anions. 
C) acids. 
D) electrolytes. 
E) counter ions. 
A) cations. 
B) anions. 
C) acids. 
D) electrolytes. 
E) counter ions. D

Question 3

Ionic bonds are formed when

Accepted Answer

A) atoms share electrons. 
B) electrons are completely transferred from one atom to another. 
C) a pair of electrons is shared unequally by two atoms. 
D) hydrogen forms bonds with negatively charged atoms. 
E) two or more atoms lose electrons at the same time. 
A) atoms share electrons. 
B) electrons are completely transferred from one atom to another. 
C) a pair of electrons is shared unequally by two atoms. 
D) hydrogen forms bonds with negatively charged atoms. 
E) two or more atoms lose electrons at the same time. B

Question 4

Relate an enzyme's structure to its reaction specificity.

Accepted Answer

A) The reaction specificity relates to the unique shape of the active site to which only a complementary shape can bind. 
B) The reaction specificity relates to the number of enzymes with the same structure. 
C) The reaction specificity relates to the size of the enzyme. 
D) The reaction specificity relates to how many active sites are present on the enzyme. 
E) The reaction specificity relates to how much energy is created when the enzyme-substrate complex forms. 
A) The reaction specificity relates to the unique shape of the active site to which only a complementary shape can bind. 
B) The reaction specificity relates to the number of enzymes with the same structure. 
C) The reaction specificity relates to the size of the enzyme. 
D) The reaction specificity relates to how many active sites are present on the enzyme. 
E) The reaction specificity relates to how much energy is created when the enzyme-substrate complex forms.

Question 5

Adenine and guanine are

Accepted Answer

A) purines represented by T and C. 
B) pyrimidines represented by A and G. 
C) purines represented by A and G. 
D) pyrimidines represented by T and C. 
E) nucleotides represented by A and G. 
A) purines represented by T and C. 
B) pyrimidines represented by A and G. 
C) purines represented by A and G. 
D) pyrimidines represented by T and C. 
E) nucleotides represented by A and G.

Question 6

The purines found in DNA are ________ and ________.

Accepted Answer

A) cytosine; guanine 
B) adenine; guanine 
C) thymine; cytosine 
D) adenine; cytosine 
E) thymine; guanine 
A) cytosine; guanine 
B) adenine; guanine 
C) thymine; cytosine 
D) adenine; cytosine 
E) thymine; guanine

Question 7

Of the following choices,the pH of the least acidic solution is

Accepted Answer

A) 6.0. 
B) 4.5. 
C) 2.3. 
D) 1.0. 
E) 12.0. 
A) 6.0. 
B) 4.5. 
C) 2.3. 
D) 1.0. 
E) 12.0.

Question 8

What do cholesterol,phospholipids,and glycolipids have in common?

Accepted Answer

A) They all form ring structures. 
B) They all have carbohydrate groups attached. 
C) They are all linear structures. 
D) They are all structural lipids that form membranes of cells. 
E) They are all soluble in water. 
A) They all form ring structures. 
B) They all have carbohydrate groups attached. 
C) They are all linear structures. 
D) They are all structural lipids that form membranes of cells. 
E) They are all soluble in water.

Question 9

Summarize the functions of lipids in the body.

Accepted Answer

Lipids are both a source of energy and a

Question 10

Which of the following statements about water is not correct?

Accepted Answer

A) It is composed of polar molecules. 
B) It is responsible for much of the mass of the human body. 
C) It has a relatively low heat capacity. 
D) It can dissolve many substances. 
E) It contains hydrogen bonds. 
A) It is composed of polar molecules. 
B) It is responsible for much of the mass of the human body. 
C) It has a relatively low heat capacity. 
D) It can dissolve many substances. 
E) It contains hydrogen bonds.

Question 11

Describe the subatomic particle not in the nucleus.

Accepted Answer

A) Protons are not in the nucleus.They whirl around the nucleus creating a proton cloud. 
B) Electrons are not in the nucleus.They whirl around the nucleus creating an electron cloud. 
C) Neutrons are not in the nucleus.They whirl around the nucleus creating a neutron cloud. 
D) Protons and neutrons are not in the nucleus.They whirl around the nucleus creating a proton and neutron cloud. 
E) Protons and electrons are not in the nucleus.They whirl around the nucleus creating a proton and electron cloud. 
A) Protons are not in the nucleus.They whirl around the nucleus creating a proton cloud. 
B) Electrons are not in the nucleus.They whirl around the nucleus creating an electron cloud. 
C) Neutrons are not in the nucleus.They whirl around the nucleus creating a neutron cloud. 
D) Protons and neutrons are not in the nucleus.They whirl around the nucleus creating a proton and neutron cloud. 
E) Protons and electrons are not in the nucleus.They whirl around the nucleus creating a proton and electron cloud.

Question 12

What kind of bond forms during the dehydration synthesis of two amino acids,and which functional groups are involved?

Accepted Answer

A) A glycosidic bond forms between the amino group of one amino acid and the carboxyl group of the other amino acid. 
B) A hydrogen bond forms between the hydrogen atom of one amino acid and the oxygen atom of the other amino acid. 
C) An ionic bond forms between the amino ion of one amino acid and the carboxylic acid of the other amino acid. 
D) A lipophilic bond forms between the hydrophobic tail of one amino acid and the hydrophilic head of the other amino acid. 
E) A peptide bond forms between the amino group of one amino acid and the carboxyl group of the other amino acid. 
A) A glycosidic bond forms between the amino group of one amino acid and the carboxyl group of the other amino acid. 
B) A hydrogen bond forms between the hydrogen atom of one amino acid and the oxygen atom of the other amino acid. 
C) An ionic bond forms between the amino ion of one amino acid and the carboxylic acid of the other amino acid. 
D) A lipophilic bond forms between the hydrophobic tail of one amino acid and the hydrophilic head of the other amino acid. 
E) A peptide bond forms between the amino group of one amino acid and the carboxyl group of the other amino acid.

Question 13

List the three structural classes of carbohydrates,and give an example of each.

Accepted Answer

A) monosaccharides (glucose),disaccharides (sucrose),and polysaccharides (starch) 
B) monosaccharides (sucrose),disaccharides (starch),and polysaccharides (glucose) 
C) monosaccharides (glucose),disaccharides (starch),and polysaccharides (sucrose) 
D) monosaccharides (sucrose),disaccharides (glucose),and polysaccharides (starch) 
E) monosaccharides (starch),disaccharides (glucose),and polysaccharides (sucrose) 
A) monosaccharides (glucose),disaccharides (sucrose),and polysaccharides (starch) 
B) monosaccharides (sucrose),disaccharides (starch),and polysaccharides (glucose) 
C) monosaccharides (glucose),disaccharides (starch),and polysaccharides (sucrose) 
D) monosaccharides (sucrose),disaccharides (glucose),and polysaccharides (starch) 
E) monosaccharides (starch),disaccharides (glucose),and polysaccharides (sucrose)

Question 14

The most abundant high-energy compound in cells is

Accepted Answer

A) DNA. 
B) adenosine diphosphate. 
C) adenosine monophosphate. 
D) adenosine triphosphate. 
E) RNA. 
A) DNA. 
B) adenosine diphosphate. 
C) adenosine monophosphate. 
D) adenosine triphosphate. 
E) RNA.

Question 15

Define electrolytes.

Accepted Answer

A) Electrolytes are enzymes that create energy in a solution. 
B) Electrolytes are enzymes that lower the activation energy for a solution. 
C) Electrolytes are ions that will conduct an electrical current in a solution. 
D) Electrolytes are hydrophobic and will create an electrical barrier between the hydrophobic substances and the hydrophilic substances in a solution. 
E) Electrolytes are sugar polymers used to rehydrate by increasing plasma volume. 
A) Electrolytes are enzymes that create energy in a solution. 
B) Electrolytes are enzymes that lower the activation energy for a solution. 
C) Electrolytes are ions that will conduct an electrical current in a solution. 
D) Electrolytes are hydrophobic and will create an electrical barrier between the hydrophobic substances and the hydrophilic substances in a solution. 
E) Electrolytes are sugar polymers used to rehydrate by increasing plasma volume.

Question 16

Describe how cells are chemical factories.

Accepted Answer

Cells are chemical factories b

Question 17

Which subatomic particles have a positive charge? Which are uncharged?

Accepted Answer

A) protons; electrons 
B) electrons; protons 
C) protons; neutrons 
D) neutrons; electrons 
E) electrons; neutrons 
A) protons; electrons 
B) electrons; protons 
C) protons; neutrons 
D) neutrons; electrons 
E) electrons; neutrons

Question 18

By weight,which element is the second most abundant in the human body?

Accepted Answer

A) oxygen 
B) carbon 
C) hydrogen 
D) nitrogen 
E) calcium 
A) oxygen 
B) carbon 
C) hydrogen 
D) nitrogen 
E) calcium

Question 19

All of the following are correct regarding DNA except

Accepted Answer

A) it contains deoxyribose sugar. 
B) molecular shape varies with hydrogen bonding along the length of the strand. 
C) the nitrogenous base is made of adenine,guanine,cytosine,and thymine. 
D) it stores genetic information. 
E) it contains a double helix. 
A) it contains deoxyribose sugar. 
B) molecular shape varies with hydrogen bonding along the length of the strand. 
C) the nitrogenous base is made of adenine,guanine,cytosine,and thymine. 
D) it stores genetic information. 
E) it contains a double helix.

Question 20

How are chemical reactions represented?

Accepted Answer

A) Reactions are represented by line plots and the line represents the direction of the reaction. 
B) Reactions are represented by a sine wave and the slope represents the direction of the reaction. 
C) Reactions are represented by chemical equations and the arrow represents the direction of the reaction. 
D) Reactions are represented by Lewis structural models and the total number of atoms represents the direction of the reaction. 
E) Reactions are represented by superscripts and subscripts and the charge represents the direction of the reaction. 
A) Reactions are represented by line plots and the line represents the direction of the reaction. 
B) Reactions are represented by a sine wave and the slope represents the direction of the reaction. 
C) Reactions are represented by chemical equations and the arrow represents the direction of the reaction. 
D) Reactions are represented by Lewis structural models and the total number of atoms represents the direction of the reaction. 
E) Reactions are represented by superscripts and subscripts and the charge represents the direction of the reaction.

Exam 2: Chemical Level of Organization

Which of the following statements about hydrogen bonds is false?

During ionization,water molecules disrupt the ionic bonds of a salt to produce a mixture of ions.These ions can carry a current and so are called

Ionic bonds are formed when

Relate an enzyme's structure to its reaction specificity.

Adenine and guanine are

The purines found in DNA are ________ and ________.

Of the following choices,the pH of the least acidic solution is

What do cholesterol,phospholipids,and glycolipids have in common?

Summarize the functions of lipids in the body.

Which of the following statements about water is not correct?

Describe the subatomic particle not in the nucleus.

What kind of bond forms during the dehydration synthesis of two amino acids,and which functional groups are involved?

List the three structural classes of carbohydrates,and give an example of each.

The most abundant high-energy compound in cells is

Define electrolytes.

Describe how cells are chemical factories.

Which subatomic particles have a positive charge? Which are uncharged?

By weight,which element is the second most abundant in the human body?

All of the following are correct regarding DNA except

How are chemical reactions represented?

An Introduction to Anatomy and Physiology

Cellular Level of Organization

Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Skeleton

Joints

Skeletal Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain, cranial Nerves, and Sensory and Motor Pathways

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Heart and Cardiovascular Function

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, nutrition, and Energetics

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

The purines found in DNA are and .