Question 1

Isotopes of an element differ in the number of

Accepted Answer

A) protons in the nucleus. 
B) electrons in the nucleus. 
C) neutrons in the nucleus. 
D) electron clouds. 
E) electrons in energy shells. 
A) protons in the nucleus. 
B) electrons in the nucleus. 
C) neutrons in the nucleus. 
D) electron clouds. 
E) electrons in energy shells.

Question 2

Nonpolar organic molecules are good examples of

Accepted Answer

A) electrolytes. 
B) molecules that will dissociate when placed into water. 
C) hydrophobic compounds. 
D) hydrophilic compounds. 
E) solutes. 
A) electrolytes. 
B) molecules that will dissociate when placed into water. 
C) hydrophobic compounds. 
D) hydrophilic compounds. 
E) solutes.

Question 3

Molecules with two fatty acid chains and a phosphate group that form biological membranes are called ________.

Accepted Answer

The answer of Molecules with two fatty acid chains and...

Question 4

How would the lack of a cofactor for an enzyme affect that enzyme's function?

Accepted Answer

A) The enzyme's function would not be altered. 
B) The enzyme would function more slowly. 
C) The enzyme would function more quickly. 
D) The enzyme would not be able to function. 
E) The enzyme would cease to function after reaching a maximum rate. 
A) The enzyme's function would not be altered. 
B) The enzyme would function more slowly. 
C) The enzyme would function more quickly. 
D) The enzyme would not be able to function. 
E) The enzyme would cease to function after reaching a maximum rate.

Question 5

The "atomic number" of an atom is determined by the number of ________ it has.

Accepted Answer

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

Question 6

Which pH is closest to normal body pH?

Accepted Answer

A) pH 7 
B) pH 8 
C) pH 4 
D) pH 3 
E) pH 2 
A) pH 7 
B) pH 8 
C) pH 4 
D) pH 3 
E) pH 2

Question 7

The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in moles per liter.

Accepted Answer

The answer of The ________ of a solution is the...

Question 8

The pyrimidine bases found in DNA are ________ and cytosine.

Accepted Answer

The answer of The pyrimidine bases found in DNA are...

Question 9

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 10

The term ________ means each enzyme catalyzes only one type of reaction.

Accepted Answer

A) saturation 
B) specificity 
C) inertia 
D) activation 
E) monoreactive 
A) saturation 
B) specificity 
C) inertia 
D) activation 
E) monoreactive

Question 11

Each amino acid differs from another in the

Accepted Answer

A) number of central carbon atoms. 
B) size of the amino group. 
C) number of carboxyl groups. 
D) nature of the side chain. 
E) number of peptide bonds in the molecule. 
A) number of central carbon atoms. 
B) size of the amino group. 
C) number of carboxyl groups. 
D) nature of the side chain. 
E) number of peptide bonds in the molecule.

Question 12

Which pH of the following is the least acidic?

Accepted Answer

A) pH 2 
B) pH 6 
C) pH 4 
D) pH 3 
E) pH 1 
A) pH 2 
B) pH 6 
C) pH 4 
D) pH 3 
E) pH 1

Question 13

An important buffer in body fluids is

Accepted Answer

A) NaCl. 
B) NaOH. 
C) HCl. 
D) NaHCO₃. 
E) H₂O. 
A) NaCl. 
B) NaOH. 
C) HCl. 
D) NaHCO₃. 
E) H₂O.

Question 14

The alpha-helix and pleated sheet are examples of ________ protein structure.

Accepted Answer

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

Question 15

You would expect a peptide bond to link

Accepted Answer

A) two simple sugars. 
B) two amino acids. 
C) two nucleotides. 
D) a sugar and a peptide. 
E) a peptide and a fatty acid. 
A) two simple sugars. 
B) two amino acids. 
C) two nucleotides. 
D) a sugar and a peptide. 
E) a peptide and a fatty acid.

Question 16

The phosphorylation of adenosine forms

Accepted Answer

A) ADP. 
B) ATP. 
C) AMP. 
D) 2ATP. 
E) ribose. 
A) ADP. 
B) ATP. 
C) AMP. 
D) 2ATP. 
E) ribose.

Question 17

Explain the role of water molecules in polysaccharide formation.

Accepted Answer

Water molecules are

Question 18

The molecule O₂ is known as

Accepted Answer

A) oxide. 
B) oxygen. 
C) organic. 
D) oxate 
E) a salt 
A) oxide. 
B) oxygen. 
C) organic. 
D) oxate 
E) a salt

Question 19

Indicate which of these lists contains only trace elements.

Accepted Answer

A) sulfur,chlorine,oxygen 
B) selenium,hydrogen,calcium 
C) boron,oxygen,carbon 
D) silicon,fluorine,tin 
E) cobalt,calcium,sodium 
A) sulfur,chlorine,oxygen 
B) selenium,hydrogen,calcium 
C) boron,oxygen,carbon 
D) silicon,fluorine,tin 
E) cobalt,calcium,sodium

Question 20

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.

Exam 2: The Chemical Level of Organization

Isotopes of an element differ in the number of

Nonpolar organic molecules are good examples of

Molecules with two fatty acid chains and a phosphate group that form biological membranes are called ________.

How would the lack of a cofactor for an enzyme affect that enzyme's function?

The "atomic number" of an atom is determined by the number of ________ it has.

Which pH is closest to normal body pH?

The ________ of a solution is the negative logarithm of the hydrogen ion concentration expressed in moles per liter.

The pyrimidine bases found in DNA are ________ and cytosine.

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

The term ________ means each enzyme catalyzes only one type of reaction.

Each amino acid differs from another in the

Which pH of the following is the least acidic?

An important buffer in body fluids is

The alpha-helix and pleated sheet are examples of ________ protein structure.

You would expect a peptide bond to link

The phosphorylation of adenosine forms

Explain the role of water molecules in polysaccharide formation.

The molecule O₂ is known as

Indicate which of these lists contains only trace elements.

Which of the following statements about water is not correct?

An Introduction to Anatomy and Physiology

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters