Question 1

NaCl is not an organic molecule.

Accepted Answer

A) True 
 B)False

Question 2

On a warm day in April, Tina jumped into the swimming pool. To her surprise the water was really cold. Which property of water did she discover?

Accepted Answer

A)  Water molecules are cohesive. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water possesses hydrogen bonds. 
D)  Water is a polar molecule. 
E)  Frozen water is less dense than liquid water. 
A)  Water molecules are cohesive. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water possesses hydrogen bonds. 
D)  Water is a polar molecule. 
E)  Frozen water is less dense than liquid water.

Question 3

William noticed water mysteriously climbing up a capillary tube. This is an example of which property of water?

Accepted Answer

A)  Frozen water is less dense than liquid water. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water molecules are cohesive. 
D)  Water has a high heat of vaporization. 
E)  Water is a solvent. 
A)  Frozen water is less dense than liquid water. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water molecules are cohesive. 
D)  Water has a high heat of vaporization. 
E)  Water is a solvent.

Question 4

What makes each amino acid unique?

Accepted Answer

A)  the central carbon 
B)  the R group 
C)  the amino group 
D)  the carboxyl group 
E)  the carbon ring 
A)  the central carbon 
B)  the R group 
C)  the amino group 
D)  the carboxyl group 
E)  the carbon ring

Question 5

The presence of a buffer in our blood is an example of homeostasis.

Accepted Answer

A) True 
 B)False

Question 6

The reason water is polar is because

Accepted Answer

A)  in polar molecules atoms share electrons evenly. 
B)  the oxygen atom is larger than the hydrogen atom. 
C)  hydrophilic molecules interact with water. 
D)  hydrophobic molecules do not interact with water. 
E)  there is a transfer of electrons from the hydrogen to the oxygen. 
A)  in polar molecules atoms share electrons evenly. 
B)  the oxygen atom is larger than the hydrogen atom. 
C)  hydrophilic molecules interact with water. 
D)  hydrophobic molecules do not interact with water. 
E)  there is a transfer of electrons from the hydrogen to the oxygen.

Question 7

What passes through the digestive tract as fiber or roughage?

Accepted Answer

A)  Maltose 
B)  Glucose 
C)  Glycogen 
D)  Starch 
E)  Cellulose 
A)  Maltose 
B)  Glucose 
C)  Glycogen 
D)  Starch 
E)  Cellulose

Question 8

Which level of protein structure is characterized by alpha and beta sheets in which hydrogen bonding holds the shape in place?

Accepted Answer

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

Question 9

Describe the structure and function of the DNA molecule.

Accepted Answer

DNA is composed of a phosphate group, ni

Question 10

Why does a protein not function after it has been denatured?

Accepted Answer

A)  The normal bonding between the R groups has been disturbed and the protein loses its normal shape. 
B)  The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape. 
C)  The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape. 
D)  The R groups form additional bonds causing the structure to become more compact. 
E)  The normal peptide bonds are ruptured and the individual amino acids are not held together any more. 
A)  The normal bonding between the R groups has been disturbed and the protein loses its normal shape. 
B)  The normal bonding between the beta sheets has been disturbed and the protein loses its normal shape. 
C)  The normal bonding between the hydrogens in the alpha helix has been disturbed and the protein loses its normal shape. 
D)  The R groups form additional bonds causing the structure to become more compact. 
E)  The normal peptide bonds are ruptured and the individual amino acids are not held together any more.

Question 11

Which polysaccharide is branched the most?

Accepted Answer

A)  cellulose 
B)  starch 
C)  glycogen 
D)  glucose 
E)  fructose 
A)  cellulose 
B)  starch 
C)  glycogen 
D)  glucose 
E)  fructose

Question 12

Fats are usually of animal origin while oils are usually of plant origin.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following foods would be a good source of fiber?

Accepted Answer

A)  All of these are good sources of fiber. 
B)  peaches 
C)  whole wheat bread 
D)  peanuts 
E)  bran cereal 
A)  All of these are good sources of fiber. 
B)  peaches 
C)  whole wheat bread 
D)  peanuts 
E)  bran cereal

Question 14

A fatty acid that contains only single bonds between the carbon atoms is considered

Accepted Answer

A)  saturated. 
B)  unsaturated. 
C)  trans unsaturated. 
D)  a cholestrol. 
E)  a steroid. 
A)  saturated. 
B)  unsaturated. 
C)  trans unsaturated. 
D)  a cholestrol. 
E)  a steroid.

Question 15

In biology, calling something organic means that it was grown without the use of any type of herbicide.

Accepted Answer

A) True 
 B)False

Question 16

Hydrogen bonds

Accepted Answer

A)  result from the loss of neutrons by an atom. 
B)  result in the formation of salts. 
C)  involve the loss and gain of electrons. 
D)  involve the sharing of electrons. 
E)  are relatively weak and can be broken rather easily. 
A)  result from the loss of neutrons by an atom. 
B)  result in the formation of salts. 
C)  involve the loss and gain of electrons. 
D)  involve the sharing of electrons. 
E)  are relatively weak and can be broken rather easily.

Question 17

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called

Accepted Answer

A)  a hydrolysis reaction. 
B)  a dehydration reaction. 
C)  monomerization. 
D)  emulsification. 
E)  disassembly. 
A)  a hydrolysis reaction. 
B)  a dehydration reaction. 
C)  monomerization. 
D)  emulsification. 
E)  disassembly.

Question 18

Ca3(PO4)2 represents a/an

Accepted Answer

A)  element. 
B)  mixture. 
C)  compound. 
D)  isotope. 
E)  atom. 
A)  element. 
B)  mixture. 
C)  compound. 
D)  isotope. 
E)  atom.

Question 19

The function of RNA in the body is to store the genetic information in the nucleus.

Accepted Answer

A) True 
 B)False

Question 20

Starch, cellulose, and glycogen are alike in that

Accepted Answer

A)  they are all made of glucose. 
B)  they contain the same number of side chains. 
C)  they have the same types of bonds between the monomer units. 
D)  they are all found in animals. 
E)  they can all be digested by our bodies. 
A)  they are all made of glucose. 
B)  they contain the same number of side chains. 
C)  they have the same types of bonds between the monomer units. 
D)  they are all found in animals. 
E)  they can all be digested by our bodies.

Exam 2: Chemistry of Life

NaCl is not an organic molecule.

On a warm day in April, Tina jumped into the swimming pool. To her surprise the water was really cold. Which property of water did she discover?

William noticed water mysteriously climbing up a capillary tube. This is an example of which property of water?

What makes each amino acid unique?

The presence of a buffer in our blood is an example of homeostasis.

The reason water is polar is because

What passes through the digestive tract as fiber or roughage?

Which level of protein structure is characterized by alpha and beta sheets in which hydrogen bonding holds the shape in place?

Describe the structure and function of the DNA molecule.

Why does a protein not function after it has been denatured?

Which polysaccharide is branched the most?

Fats are usually of animal origin while oils are usually of plant origin.

Which of the following foods would be a good source of fiber?

A fatty acid that contains only single bonds between the carbon atoms is considered

In biology, calling something organic means that it was grown without the use of any type of herbicide.

Hydrogen bonds

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called

Ca3(PO4)2 represents a/an

The function of RNA in the body is to store the genetic information in the nucleus.

Starch, cellulose, and glycogen are alike in that

Exploring Life and Science

Cell Structure and Function

Organization and Regulation of Body Systems

Cardiovascular System: Heart and Blood Vessels

Cardiovascular System: Blood

The Lymphatic and Immune Systems

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocrine System

Reproductive System

Human Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

DNA Biology and Technology

Human Evolution

Global Ecology and Human Interferences

Human Population, Planetary Resources, and Conservation

Infectious Diseases Supplement

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Ca₃(PO₄)₂ represents a/an