Question 1

-The sodium chloride molecule breaks apart in water. What does "B" represent?

Accepted Answer

A)  chloride ion 
B)  dissociation 
C)  water molecule 
D)  sodium ion 
E)  salt crystal 
A)  chloride ion 
B)  dissociation 
C)  water molecule 
D)  sodium ion 
E)  salt crystal

Question 2

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of atom is found at "C"?

Accepted Answer

A)  hydrogen bond 
B)  water molecule 
C)  oxygen atom 
D)  hydrogen atom 
E)  polar covalent bond 
A)  hydrogen bond 
B)  water molecule 
C)  oxygen atom 
D)  hydrogen atom 
E)  polar covalent bond

Question 3

What is the building block molecule of a protein?

Accepted Answer

A)  amino acid 
B)  nucleic acid 
C)  monosaccharide 
D)  glycerol 
E)  fatty acid 
A)  amino acid 
B)  nucleic acid 
C)  monosaccharide 
D)  glycerol 
E)  fatty acid

Question 4

An enzyme

Accepted Answer

A)  has a two-dimensional shape. 
B)  is permanently changed in a chemical reaction. 
C)  increases the activation energy needed in a chemical reaction. 
D)  is a protein catalyst. 
E)  cannot be denatured. 
A)  has a two-dimensional shape. 
B)  is permanently changed in a chemical reaction. 
C)  increases the activation energy needed in a chemical reaction. 
D)  is a protein catalyst. 
E)  cannot be denatured.

Question 5

Which of the following statements best describes RNA?

Accepted Answer

A)  RNA is found outside a cell. 
B)  RNA contains the base thymine. 
C)  RNA is a single-stranded molecule. 
D)  RNA molecules are antiparallel. 
E)  RNA is a double helix. 
A)  RNA is found outside a cell. 
B)  RNA contains the base thymine. 
C)  RNA is a single-stranded molecule. 
D)  RNA molecules are antiparallel. 
E)  RNA is a double helix.

Question 6

The building blocks of proteins are

Accepted Answer

A)  triglycerides. 
B)  phospholipids. 
C)  amino acids. 
D)  monosaccharides. 
E)  eicosanoids. 
A)  triglycerides. 
B)  phospholipids. 
C)  amino acids. 
D)  monosaccharides. 
E)  eicosanoids.

Question 7

Solubility refers to the ability of one substance to ___________ in another.

Accepted Answer

A)  react 
B)  dissolve 
C)  precipitate 
D)  conduct 
E)  None of these choices are correct. 
A)  react 
B)  dissolve 
C)  precipitate 
D)  conduct 
E)  None of these choices are correct.

Question 8

Which of the following is the correct complementary strand to CATGTC?

Accepted Answer

A)  GTACAG 
B)  CATGTC 
C)  GUACAG 
D)  AGCACA 
E)  TCGTAT 
A)  GTACAG 
B)  CATGTC 
C)  GUACAG 
D)  AGCACA 
E)  TCGTAT

Question 9

Which of the following is the correct sequence from largest to smallest?

Accepted Answer

A)  amino acid, cell, protein, atom 
B)  amino acid, atom, cell, protein 
C)  cell, protein, amino acid, atom 
D)  atom, amino acid, protein, cell 
E)  protein, cell, amino acid, atom 
A)  amino acid, cell, protein, atom 
B)  amino acid, atom, cell, protein 
C)  cell, protein, amino acid, atom 
D)  atom, amino acid, protein, cell 
E)  protein, cell, amino acid, atom

Question 10

Substances dissolved in the liquid portion of a solution are called

Accepted Answer

A)  solutes. 
B)  solvents. 
C)  catalysts. 
D)  osmoles. 
E)  insoluble. 
A)  solutes. 
B)  solvents. 
C)  catalysts. 
D)  osmoles. 
E)  insoluble.

Question 11

ATP

Accepted Answer

A)  can be synthesized from ADP. 
B)  stores and releases energy in the cell. 
C)  is associated with a reversible reaction. 
D)  is associated with anabolism and catabolism. 
E)  All of these choices are correct. 
A)  can be synthesized from ADP. 
B)  stores and releases energy in the cell. 
C)  is associated with a reversible reaction. 
D)  is associated with anabolism and catabolism. 
E)  All of these choices are correct.

Question 12

An organic molecule such as a vitamin that makes an enzyme functional is called a/an

Accepted Answer

A)  buffer. 
B)  coactivator. 
C)  catalyst. 
D)  coenzyme. 
A)  buffer. 
B)  coactivator. 
C)  catalyst. 
D)  coenzyme.

Question 13

The primary structure of a protein is

Accepted Answer

A)  the number of polypeptide chains in the molecule. 
B)  the sequence of amino acids in the polypeptide chain. 
C)  the folded, helical nature of the molecule. 
D)  represented by multiple polypeptide chains. 
E)  the hydrogen bonds between amino acids. 
A)  the number of polypeptide chains in the molecule. 
B)  the sequence of amino acids in the polypeptide chain. 
C)  the folded, helical nature of the molecule. 
D)  represented by multiple polypeptide chains. 
E)  the hydrogen bonds between amino acids.

Question 14

All of the following terms relate to lipids. Which does not belong with the other four?

Accepted Answer

A)  cholesterol 
B)  estrogen 
C)  steroid 
D)  triglyceride 
E)  bile salts 
A)  cholesterol 
B)  estrogen 
C)  steroid 
D)  triglyceride 
E)  bile salts

Question 15

An atom has an atomic number of 19 and a mass number of 39. This atom will have

Accepted Answer

A)  19 neutrons. 
B)  20 neutrons. 
C)  39 neutrons. 
D)  58 neutrons. 
E)  20 electrons. 
A)  19 neutrons. 
B)  20 neutrons. 
C)  39 neutrons. 
D)  58 neutrons. 
E)  20 electrons.

Question 16

Why are cyanide compounds lethal to humans?

Accepted Answer

A)  They interfere with protein synthesis. 
B)  They interfere with nerve impulses. 
C)  They interfere with the production of ATP. 
D)  They interfere with muscle contraction. 
E)  All of these occur with cyanide poisoning. 
A)  They interfere with protein synthesis. 
B)  They interfere with nerve impulses. 
C)  They interfere with the production of ATP. 
D)  They interfere with muscle contraction. 
E)  All of these occur with cyanide poisoning.

Question 17

Which of the following lists the components of a nucleotide?

Accepted Answer

A)  phosphate-lipid-organic base 
B)  monosaccharide-organic base-sucrose 
C)  phosphate-monosaccharide-organic base 
D)  phosphate-sucrose-amino acid 
E)  monosaccharide-amino acid-phosphate 
A)  phosphate-lipid-organic base 
B)  monosaccharide-organic base-sucrose 
C)  phosphate-monosaccharide-organic base 
D)  phosphate-sucrose-amino acid 
E)  monosaccharide-amino acid-phosphate

Question 18

Which of the following is NOT a possible product of a nuclear reaction to form a more stable nucleus?

Accepted Answer

A)  gamma ray 
B)  alpha particle 
C)  X-ray 
D)  beta particle 
A)  gamma ray 
B)  alpha particle 
C)  X-ray 
D)  beta particle

Question 19

The mass number of an atom is the number of

Accepted Answer

A)  protons in the atom. 
B)  neutrons in the atom. 
C)  protons plus electrons in the atom. 
D)  electrons plus neutrons in the atom. 
E)  neutrons plus protons in the atom. 
A)  protons in the atom. 
B)  neutrons in the atom. 
C)  protons plus electrons in the atom. 
D)  electrons plus neutrons in the atom. 
E)  neutrons plus protons in the atom.

Question 20

Lipids

Accepted Answer

A)  can insulate and help prevent heat loss. 
B)  yield little energy per unit of weight. 
C)  function as enzymes. 
D)  are all water soluble. 
E)  comprise the genetic material of cells. 
A)  can insulate and help prevent heat loss. 
B)  yield little energy per unit of weight. 
C)  function as enzymes. 
D)  are all water soluble. 
E)  comprise the genetic material of cells.

Exam 2: The Chemical Basis of Life

-The sodium chloride molecule breaks apart in water. What does "B" represent?

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of atom is found at "C"?

What is the building block molecule of a protein?

An enzyme

Which of the following statements best describes RNA?

The building blocks of proteins are

Solubility refers to the ability of one substance to ___________ in another.

Which of the following is the correct complementary strand to CATGTC?

Which of the following is the correct sequence from largest to smallest?

Substances dissolved in the liquid portion of a solution are called

ATP

An organic molecule such as a vitamin that makes an enzyme functional is called a/an

The primary structure of a protein is

All of the following terms relate to lipids. Which does not belong with the other four?

An atom has an atomic number of 19 and a mass number of 39. This atom will have

Why are cyanide compounds lethal to humans?

Which of the following lists the components of a nucleotide?

Which of the following is NOT a possible product of a nuclear reaction to form a more stable nucleus?

The mass number of an atom is the number of

Lipids

The Human Organism

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

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