Question 1

Which of the following substances is most alkaline?

Accepted Answer

A)  lemon juice, pH = 2 
B)  urine, pH = 6 
C)  tomato juice, pH = 4 
D)  white wine, pH = 3 
E)  stomach secretions, pH = 1 
A)  lemon juice, pH = 2 
B)  urine, pH = 6 
C)  tomato juice, pH = 4 
D)  white wine, pH = 3 
E)  stomach secretions, pH = 1

Question 2

Water striders are insects that literally walk on water.These insects are frequently found living on ponds.If hydrogen bonds did not exist, how would this affect the life of water striders?

Accepted Answer

Hydrogen bonds are responsible for the s

Question 3

The ________ molecules which form the bilayer region of the cell membrane exhibit hydrophilic properties on the outer surface and hydrophobic properties on the inner surface.

Accepted Answer

The answer of The ________ molecules which form the bilayer...

Question 4

Ahmed is trying to memorize chemical structures of every compound his professor has indicated are important to the human body.Explain to him that an easier way is to memorize a few rules of chemical bonding and then figure out the structure of the important compounds, especially the simpler compounds.

Accepted Answer

Elements combine to form molecules in pr

Question 5

Ions with a negative charge are called

Accepted Answer

A)  anions. 
B)  electrons. 
C)  cations. 
D)  neurons. 
E)  tissues. 
A)  anions. 
B)  electrons. 
C)  cations. 
D)  neurons. 
E)  tissues.

Question 6

Which of the following levels of protein structure occurs from spontaneous folding that results from covalent bonds and noncovalent interactions?

Accepted Answer

A)  primary 
B)  secondary 
C)  teritiary 
D)  quaternary 
E)  triangular 
A)  primary 
B)  secondary 
C)  teritiary 
D)  quaternary 
E)  triangular

Question 7

Which of the following is a common feature of soluble proteins?

Accepted Answer

A)  structural support 
B)  noncovalent interaction 
C)  receptor binding 
D)  chemical modulation 
E)  All of the answers are correct. 
A)  structural support 
B)  noncovalent interaction 
C)  receptor binding 
D)  chemical modulation 
E)  All of the answers are correct.

Question 8

The pyrimidines found in DNA are ________ and ________.

Accepted Answer

A)  adenine, guanine 
B)  cytosine, thymine 
C)  deoxyribose, guanine 
D)  guanine, cytosine 
E)  uracil, adenine 
A)  adenine, guanine 
B)  cytosine, thymine 
C)  deoxyribose, guanine 
D)  guanine, cytosine 
E)  uracil, adenine

Question 9

Which of the following formulas describes the relationship between pH and hydrogen ions?

Accepted Answer

A)  pH = log [H⁺] 
B)  pH = -log [H⁺] 
C)  [H⁺] = -log pH 
D)  [H⁺] = log pH 
E)  pH= [H⁺] + [OH⁻] 
A)  pH = log [H⁺] 
B)  pH = -log [H⁺] 
C)  [H⁺] = -log pH 
D)  [H⁺] = log pH 
E)  pH= [H⁺] + [OH⁻]

Question 10

The protein keratin which is found in hair and nails and affords nails their rigid structure would be categorized as which of the following protein shapes?

Accepted Answer

A)  fibrous 
B)  globular 
C)  acidic 
D)  hexavalent 
E)  triangular 
A)  fibrous 
B)  globular 
C)  acidic 
D)  hexavalent 
E)  triangular

Question 11

An ion has gained or lost

Accepted Answer

A)  a proton(s). 
B)  a neutron(s). 
C)  an electron(s). 
D)  a carbon atom(s). 
E)  a double bond. 
A)  a proton(s). 
B)  a neutron(s). 
C)  an electron(s). 
D)  a carbon atom(s). 
E)  a double bond.

Question 12

Which of the following is a way to recognize a carbohydrate by looking at its name only?

Accepted Answer

A)  It ends in -ase. 
B)  It ends in -ose. 
C)  It begins with nucleo-. 
D)  It begins with proteo-. 
E)  It begins with lipo-. 
A)  It ends in -ase. 
B)  It ends in -ose. 
C)  It begins with nucleo-. 
D)  It begins with proteo-. 
E)  It begins with lipo-.

Question 13

In the equation CO₂ + H₂O ↔ H₂CO₃ ↔ H⁺ + HCO₃⁻, which of these is an acid?

Accepted Answer

A)  HCO₃⁻ 
B)  H₂CO₃ 
C)  H₂O 
D)  CO₂ 
E)  H⁺ 
A)  HCO₃⁻ 
B)  H₂CO₃ 
C)  H₂O 
D)  CO₂ 
E)  H⁺

Question 14

Glycosylated molecules are those formed with which group of organic compounds?

Accepted Answer

A)  lipids 
B)  nucleic acids 
C)  lysosomes 
D)  cholesterol 
E)  DNA 
A)  lipids 
B)  nucleic acids 
C)  lysosomes 
D)  cholesterol 
E)  DNA

Question 15

All organic molecules contain which of the following?

Accepted Answer

A)  calcium 
B)  carbon 
C)  adenosine 
D)  oxygen 
E)  lipids 
A)  calcium 
B)  carbon 
C)  adenosine 
D)  oxygen 
E)  lipids

Question 16

Only free H⁺ contributes to the hydrogen ion concentration.

Accepted Answer

A) True 
 B)False

Question 17

Interactions between different globular or fibrous polypeptide chains result in which type of structure?

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentagonal 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentagonal

Question 18

Which group of elements makes up more than 90% of the body's mass?

Accepted Answer

A)  O, H, Na 
B)  C, Na, K 
C)  O, Ca, H 
D)  Ca, C, O 
E)  O, C, H 
A)  O, H, Na 
B)  C, Na, K 
C)  O, Ca, H 
D)  Ca, C, O 
E)  O, C, H

Question 19

A free radical is a

Accepted Answer

A)  charged particle. 
B)  molecule with an extra electron. 
C)  molecule with an extra neutron. 
D)  molecule with an extra proton. 
E)  molecule with an unpaired electron. 
A)  charged particle. 
B)  molecule with an extra electron. 
C)  molecule with an extra neutron. 
D)  molecule with an extra proton. 
E)  molecule with an unpaired electron.

Question 20

Molecular function and distinctive shapes of large complex biomolecules result from the interactions of which of the following?

Accepted Answer

A)  van der Waals forces 
B)  ionic bonds 
C)  hydrogen bonds 
D)  covalent bond angles 
E)  All of the choices can contribute. 
A)  van der Waals forces 
B)  ionic bonds 
C)  hydrogen bonds 
D)  covalent bond angles 
E)  All of the choices can contribute.

Exam 2: Molecular Interactions

Which of the following substances is most alkaline?

Water striders are insects that literally walk on water.These insects are frequently found living on ponds.If hydrogen bonds did not exist, how would this affect the life of water striders?

The ________ molecules which form the bilayer region of the cell membrane exhibit hydrophilic properties on the outer surface and hydrophobic properties on the inner surface.

Ions with a negative charge are called

Which of the following levels of protein structure occurs from spontaneous folding that results from covalent bonds and noncovalent interactions?

Which of the following is a common feature of soluble proteins?

The pyrimidines found in DNA are ________ and ________.

Which of the following formulas describes the relationship between pH and hydrogen ions?

The protein keratin which is found in hair and nails and affords nails their rigid structure would be categorized as which of the following protein shapes?

An ion has gained or lost

Which of the following is a way to recognize a carbohydrate by looking at its name only?

In the equation CO₂ + H₂O ↔ H₂CO₃ ↔ H⁺ + HCO₃⁻, which of these is an acid?

Glycosylated molecules are those formed with which group of organic compounds?

All organic molecules contain which of the following?

Only free H⁺ contributes to the hydrogen ion concentration.

Interactions between different globular or fibrous polypeptide chains result in which type of structure?

Which group of elements makes up more than 90% of the body's mass?

A free radical is a

Molecular function and distinctive shapes of large complex biomolecules result from the interactions of which of the following?

Introduction to Physiology

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters

The pyrimidines found in DNA are and .