Question 1

Which nitrogen-containing base is found in DNA but not in RNA?

Accepted Answer

A)   guanine
B)   thymine
C)   cytosine
D)   adenine
E)   uracilF) B) and D)
G) C) and D)

Question 2

Which of the following is an inorganic molecule?

Accepted Answer

A)   CaCO 3
B)   C­ 6H 12O 6
C)   C 256H 381N 65O 79S 6
D)   C 18H 34O 2
E)   CH 4F) None of the above
G) C) and D)

Question 3

A molecule is said to be organic if it contains

Accepted Answer

A)   double bonds.
B)   hydrogen bonds.
C)   carbon and hydrogen atoms.
D)   carbon and oxygen atoms.
E)   two or more atoms.F) A) and D)
G) A) and C)

Question 4

In a dehydration reaction, ________. In order for this to occur water is ________.

Accepted Answer

A)   monomers are joined to become a polymer; removed
B)   polymers are broken up to form monomers; added
C)   monomers are broken up to form polymers; added
D)   polymers are joined to form monomers; removed
E)   polymers are broken up to form monomers; removedF) A) and D)
G) None of the above

Question 5

Which of the following is a true statement about proteins?

Accepted Answer

A)   The three dimensional shape of a protein is a result of its secondary structure.
B)   Denaturation restores proteins' shape and function.
C)   Proteins are used to produce DNA.
D)   Proteins are monomers and they are built from amino acid polymers.
E)   Proteins are used to produce many types of hormones.F) D) and E)
G) A) and B)

Question 6

Which of the following is a hydrolysis reaction?

Accepted Answer

A)   amino acids forming proteins
B)   glycogen forming glucose molecules
C)   nucleotides forming DNA
D)   glucose units forming starch
E)   fatty acids and glycerol forming a fatF) A) and C)
G) B) and D)

Question 7

Deoxyribose is a sugar found in

Accepted Answer

A)   all proteins.
B)   lipids.
C)   DNA.
D)   glycogen.
E)   RNA.F) B) and C)
G) A) and E)

Question 8

How does DNA differ from RNA?

Accepted Answer

A)   DNA is in plants; RNA is found in animals.
B)   DNA is comprised of a double-strand; RNA is a single-strand.
C)   DNA is made from amino acids; RNA is made from nucleotides.
D)   DNA is used by all living things; RNA is used only in plants.
E)   DNA is seen in animals; RNA is seen in all living things.F) B) and E)
G) A) and C)

Question 9

A polypeptide forms a beta pleated sheet or an alpha helix as its primary structure.

Accepted Answer

A) True 
 B)False

Question 10

The principle role for sugars in living things is to

Accepted Answer

A)   form cell membranes.
B)   serve as a form of long-term energy storage.
C)   create our genetic code.
D)   serve as a form of immediate cellularenergy.
E)   produce hormones.F) None of the above
G) D) and E)

Question 11

Which of the following is least likely to be affected when a protein is denatured?

Accepted Answer

A)   primary structure
B)   secondary structure
C)   tertiary structure
D)   quaternary structure
E)   the folded shape of the proteinF) None of the above
G) C) and D)

Question 12

A saturated fat has

Accepted Answer

A)   no double bonds.
B)   more than one double bond.
C)   only one double bond.
D)   many omega-3 fatty acids.
E)   long protein chains.F) B) and E)
G) A) and D)

Question 13

Select the correct association.

Accepted Answer

A)   carbohydrates-serve to insulate, protect, and store energy
B)   lipids-contain the codes used to construct proteins
C)   proteins-have three forms: monosaccharides, disaccharides, and polysaccharides
D)   nucleic acids-provide the body with energy
E)   carbohydrates-include glucose, sucrose, and starchF) A) and C)
G) C) and D)

Question 14

The primary structure of a protein refers to the

Accepted Answer

A)   interactions among two or more polypeptides.
B)   alpha helix or pleated sheets.
C)   side groups of the amino acids.
D)   number and sequence of amino acids.
E)   DNA nucleotide sequence that coded for it.F) B) and C)
G) All of the above

Question 15

Hydrolysis of sucrose, a disaccharide, results in

Accepted Answer

A)   two monosaccharides.
B)   a polypeptide.
C)   three monosaccharides.
D)   two glycerol units.
E)   the formation of a polysaccharide.F) B) and D)
G) A) and C)

Question 16

Which nitrogen-containing base is found in RNA but not in DNA?

Accepted Answer

A)   guanine
B)   thymine
C)   cytosine
D)   adenine
E)   uracilF) B) and C)
G) B) and E)

Question 17

The term "functional" is used in the phrase "functional group" because it describes a group of atoms that

Accepted Answer

A)   are organic.
B)   make the entire molecule hydrophobic.
C)   prevent interaction with other molecules.
D)   help determine the chemical properties of an organic molecule.
E)   make the entire molecule hydrophilic.F) A) and B)
G) D) and E)

Question 18

In addition to carbon, an organic molecule must contain

Accepted Answer

A)   nitrogen.
B)   oxygen.
C)   hydrogen.
D)   sulfur.
E)   phosphorous.F) A) and D)
G) A) and C)

Question 19

The four main categories of organic macromolecules are

Accepted Answer

A)   monosaccharides, disaccharides, trisaccharides, and polysaccharides.
B)   proteins, DNA, waxes, and sugars.
C)   carbohydrates, lipids, proteins, and nucleic acids.
D)   RNA, DNA, steroids, and fats.
E)   lipids, starches, DNA, and protein.F) B) and D)
G) D) and E)

Question 20

In which of the following is the correct monomer matched with its polymer?

Accepted Answer

A)   fatty acid - DNA
B)   monosaccharide - lipid
C)   glycerol - carbohydrate
D)   amino acid - protein
E)   nucleotide - carbohydrateF) All of the above
G) A) and B)

Exam 3: The Organic Molecules of Life

The principle role for sugars in living things is to

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Select the correct association.

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Which of the following is an inorganic molecule?

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A saturated fat has

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A polypeptide forms a beta pleated sheet or an alpha helix as its primary structure.

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Deoxyribose is a sugar found in

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The four main categories of organic macromolecules are

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Which of the following is a hydrolysis reaction?

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Hydrolysis of sucrose, a disaccharide, results in

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In a dehydration reaction, ________. In order for this to occur water is ________.

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Which nitrogen-containing base is found in DNA but not in RNA?

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Which of the following is a true statement about proteins?

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Which of the following is least likely to be affected when a protein is denatured?

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The primary structure of a protein refers to the

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The term "functional" is used in the phrase "functional group" because it describes a group of atoms that

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Which nitrogen-containing base is found in RNA but not in DNA?

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In which of the following is the correct monomer matched with its polymer?

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A molecule is said to be organic if it contains

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How does DNA differ from RNA?

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In addition to carbon, an organic molecule must contain

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In a dehydration reaction, . In order for this to occur water is .

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