Question 1

What is the molecular formula for 5 glucose molecules?

Accepted Answer

A)  C30H50O25
B)  C30H60O30
C)  C30H52O26
D)  C6H24O12E) A) and D)
F) None of the above

Question 2

Which of the following would NOT be a molecule used for energy storage?

Accepted Answer

A)  starch
B)  cellulose
C)  glycogen
D)  chitinE) A) and C)
F) None of the above

Question 3

Which of the following are structural carbohydrate molecules?

Accepted Answer

A)  starch and glycogen
B)  starch and cellulose
C)  glycogen and cellulose
D)  cellulose and chitin
E)  glycogen and chitinF) B) and C)
G) All of the above

Question 4

Carbon can form covalent bonds with as many as four other atoms.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following protein is correctly matched with its function?

Accepted Answer

A)  hemoglobin is found within the red blood cells
B)  myosin is found within the ligaments
C)  actin is found within the tendons
D)  collagen is found within the muscle cells
E)  hemoglobin is found within the cell membraneF) B) and E)
G) A) and E)

Question 6

Waxes consist of a glycerol bonded to three long-chain fatty acids.

Accepted Answer

A) True 
 B)False

Question 7

Identify this molecule:

Accepted Answer

A)  amino acid
B)  hydrocarbon
C)  carbohydrate
D)  alcohol
E)  lipidF) C) and D)
G) A) and B)

Question 8

Which of the following protein structures is exemplified by globular proteins?

Accepted Answer

A)  tertiary
B)  secondary
C)  primary
D)  quaternary
E)  all of the protein structures are exemplified by globular proteinsF) A) and C)
G) D) and E)

Question 9

A saturated fat

Accepted Answer

A)  is solid at room temperature.
B)  has fatty acids with no double bonds between the carbon atoms.
C)  is of animal origin.
D)  All of the choices are correct.E) None of the above
F) C) and D)

Question 10

ATP is a protein that supplies energy to the cell.

Accepted Answer

A) True 
 B)False

Question 11

What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?

Accepted Answer

A)  isotope
B)  isomer
C)  homomolecules
D)  organic
E)  balancedF) B) and E)
G) A) and D)

Question 12

Saturated fatty acids and unsaturated fatty acids differ in:

Accepted Answer

A)  the number of carbon-to-carbon bonds
B)  the consistency at room temperature
C)  the number of hydrogen atoms present
D)  all of the choices are differences between saturated and unsaturated fatty acidE) B) and D)
F) A) and D)

Question 13

The differences between organic and inorganic molecules do not follow simple absolute rules.However,most organic molecules are associated with living organisms.Which of the following statements does NOT correspond to the general distinctions between these types of molecules?

Accepted Answer

A)  Carbon dioxide (CO2) lacks hydrogen atoms found in organic molecules.
B)  Formaldehyde (CH2O) is a small molecule compared to most organic molecules.
C)  Salt (Na+Cl-) is not an organic molecule but is important to the life of many organisms.
D)  Because they are in living organisms,organic carbon atoms are different from the inorganic carbon atoms forming the molecular structure of soot or a diamond.E) None of the above
F) All of the above

Question 14

Which of these statements is NOT true about DNA?

Accepted Answer

A)  It is the genetic material of the cell.
B)  It forms a double helix.
C)  Adenine pairs with thymine and guanine pairs with cytosine.
D)  It contains the sugar ribose.
E)  The sugar and phosphate groups form the backbone of the molecule.F) A) and B)
G) None of the above

Question 15

Which of the following is a function of a steroid?

Accepted Answer

A)  sex hormone
B)  transmission of genetic information
C)  long term energy storage
D)  insulation against cold
E)  protective layerF) B) and D)
G) B) and C)

Question 16

What are the basic structures that make up a nucleotide?

Accepted Answer

A)  Pentose sugar,phosphate and nitrogen-containing base
B)  Pentose sugar,nitrate and phosphorus-containing base
C)  Ribose sugar,phosphate and nitrogen-containing base
D)  Hydroxide group,phosphate and nitrogen-containing base
E)  Pentose sugar,sodium and nitrogen-containing baseF) All of the above
G) A) and E)

Question 17

Which of the following structures is classified as a nucleic acid?

Accepted Answer

A)  adenine
B)  RNA
C)  thymine
D)  guanine
E)  cytosineF) A) and C)
G) B) and E)

Question 18

Which statement below correctly describes why ATP is a high energy structure?

Accepted Answer

A)  ATP contains 2 phosphate bonds that contain high levels of energy
B)  ATP contains hydro-carbon chains that hold energy
C)  ATP is composed of thymine which is a high energy molecule
D)  the last two phosphate bonds are unstable and easily broken
E)  the first phosphate bond is unstable and easily brokenF) All of the above
G) B) and E)

Question 19

After eating eggs for breakfast,you return in the evening,dunk the dirty dishes in water,and notice the yellow streaks remain "dried on." However,after soaking awhile,the complex of various egg yolk molecules easily "washes off." What has happened?

Accepted Answer

A)  Heating denatured the egg protein molecules,hydrolysis reactions then formed bonds in the dried egg,and soaking in water eventually resulted in condensation reactions where water broke these bonds.
B)  Heating denatured the egg protein molecules,unorganized condensation reactions then formed bonds in the drying egg,and soaking in water eventually resulted in hydrolysis reactions where water broke these bonds.
C)  The egg monomers were fused to become one polymer,which was easily dissolved by water back into monomers.
D)  The presence or absence of water changes the molecules from hydrophilic to hydrophobic respectively.
E)  The addition of water converted organic molecules into inorganic molecules.F) B) and D)
G) A) and B)

Question 20

Which carbohydrate is found in the exoskeleton of insects and crabs?

Accepted Answer

A)  starch
B)  chitin
C)  cellulose
D)  glycogen
E)  glycerolF) B) and C)
G) B) and E)

Exam 3: The Chemistry of Organic Molecules

Carbon can form covalent bonds with as many as four other atoms.

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Which of the following protein is correctly matched with its function?

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A saturated fat

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Saturated fatty acids and unsaturated fatty acids differ in:

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Waxes consist of a glycerol bonded to three long-chain fatty acids.

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Which of the following are structural carbohydrate molecules?

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What is the molecular formula for 5 glucose molecules?

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Which of these statements is NOT true about DNA?

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Which statement below correctly describes why ATP is a high energy structure?

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Which of the following protein structures is exemplified by globular proteins?

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ATP is a protein that supplies energy to the cell.

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Identify this molecule:

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What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?

Correct AnswerverifiedShow Answer

After eating eggs for breakfast,you return in the evening,dunk the dirty dishes in water,and notice the yellow streaks remain "dried on." However,after soaking awhile,the complex of various egg yolk molecules easily "washes off." What has happened?

Correct AnswerverifiedShow Answer

Which of the following would NOT be a molecule used for energy storage?

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Which of the following is a function of a steroid?

Correct AnswerverifiedShow Answer

The differences between organic and inorganic molecules do not follow simple absolute rules.However,most organic molecules are associated with living organisms.Which of the following statements does NOT correspond to the general distinctions between these types of molecules?

Correct AnswerverifiedShow Answer

Which carbohydrate is found in the exoskeleton of insects and crabs?

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Which of the following structures is classified as a nucleic acid?

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What are the basic structures that make up a nucleotide?

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