Question 1

Which is true of the nucleotide base composition within the DNA double helix?

Accepted Answer

A)   G=A
B)   T=C
C)   T+A=C+G
D)   T+G=A+C
E)   A=UF) D) and E)
G) A) and B)

Question 2

The four nucleotide bases found in DNA are identical to those in RNA.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is an important feature of carbon and that makes life possible?

Accepted Answer

A)   Carbon can form a maximum of 8 covalent bonds.
B)   Carbon can form a maximum of 6 covalent bonds.
C)   Carbon can form a maximum of 4 covalent bonds.
D)   Carbon can form a maximum of 2 covalent bonds.
E)   None of the choices are possible for carbon.F) B) and E)
G) A) and B)

Question 4

A monomer is to a polymer, as glucose is to

Accepted Answer

A)   lipids.
B)   carboyhydrates.
C)   nucleic acids.
D)   proteins.
E)   None of the choices are correct.F) None of the above
G) B) and C)

Question 5

Which of the following are important features of carbon and the diversity of organic molecules?

Accepted Answer

A)   Carbon can form up to 4 covalent bonds with other elements.
B)   Carbon bonds may occur in multiple different configurations such as linear, ringlike, and highly branched.
C)   Carbon can form both polar and nonpolar covalent bonds with various elements.
D)   Carbon bonds are stable at the range of temperatures associated with life.
E)   All the choices are correct.F) A) and B)
G) A) and D)

Question 6

This class of macromolecules serves as important energy stores and is a major component of plasma membranes.

Accepted Answer

A)   lipids
B)   carbohydrates
C)   nucleic acids
D)   proteins
E)   ionsF) C) and D)
G) B) and C)

Question 7

Which macromolecule has the highest diversity of functions?

Accepted Answer

A)   carbohydrates
B)   proteins
C)   nucleic acids
D)   lipids
E)   glycolipidsF) A) and E)
G) C) and D)

Question 8

Friedrich Wö hler refuted the scientific concept of vitalism during the early 1800s by proving that organic molecules could be synthesized outside a living organism.

Accepted Answer

A) True 
 B)False  True

Question 9

An amino acid is to a protein as a ________ is to a nucleic acid.

Accepted Answer

A)   glucose
B)   glycerol
C)   nucleotide
D)   fatty acid
E)   celluloseF) A) and B)
G) A) and C) C

Question 10

Which of the following has identical molecular formulas but different structures and characteristics?

Accepted Answer

A)   isomers
B)   sterioisomers
C)   enantiomers
D)   isomers, but not sterioisomers
E)   isomers, sterioisomers, and enantiomersF) C) and E)
G) A) and E)

Question 11

Which of the following molecules is nonpolar?

Accepted Answer

A)   C2H5COOH
B)   C2H6
C)   R-NH2
D)   C3H7OH
E)   C5H10O5F) None of the above
G) A) and D) B

Question 12

All are true about a dehydration reaction EXCEPT which of the following?

Accepted Answer

A)   Results in removal of a water molecule.
B)   Essential for the breakdown of complex molecules to simple ones.
C)   Essential to the formation of polymers.
D)   Essential for the formation of glycogen from glucose monomers.
E)   Essential for the formation of triglycerides (fat)  from glycerol and fatty acids.F) B) and E)
G) B) and D)

Question 13

Which is true of the base pairing seen between two DNA strands?

Accepted Answer

A)   Adenine bonds with guanine.
B)   Guanine bonds with thymine
C)   Thymine bonds with cytosine
D)   Cytosine bonds with guanine
E)   Guanine bonds with thymine.F) A) and C)
G) A) and D)

Question 14

Organic molecules with identical molecular formulas and that are structurally mirror images of each other are most specifically referred to as

Accepted Answer

A)   polymers.
B)   mimics.
C)   enantiomers.
D)   hydrocarbon rings.
E)   saturated fatty acids.F) B) and E)
G) A) and D)

Question 15

If a specimen contains 30% adenine in its DNA then how much cytosine will there be?

Accepted Answer

A)   40%
B)   30%
C)   20%
D)   10%
E)   Cannot be determined.F) All of the above
G) B) and D)

Question 16

Which of these is NOT a lipid?

Accepted Answer

A)   phospholipid
B)   cholesterol
C)   steroids
D)   glycogen
E)   wax and oilsF) C) and E)
G) None of the above

Question 17

Lipids and carbohydrates have similar functions insofar as they can represent a form of energy store in animals.

Accepted Answer

A) True 
 B)False

Question 18

The tertiary structure of a protein is dependent on

Accepted Answer

A)   the side chain composition of each amino acid within the protein.
B)   hydrogen bonding between the carboxyl and amino groups within the polypeptide chain.
C)   the interactions of multiple polypeptide chains that make up a functional protein.
D)   the way in which the peptide bond forms.
E)   the degree through which the dehydration reaction occurs.F) A) and E)
G) B) and D)

Question 19

Which of the molecules below is NOT a subunit for building macromolecules?

Accepted Answer

A)   glucose
B)   amino acids
C)   steroid
D)   fatty acid
E)   nucleotidesF) B) and C)
G) B) and D)

Question 20

Macromolecules such as lipids and carbohydrates are produced from simple subunits through condensation reactions.

Accepted Answer

A) True 
 B)False

Exam 3: The Chemical Basis of Life II: Organic Molecules

Which is true of the nucleotide base composition within the DNA double helix?

Correct AnswerverifiedShow Answer

The four nucleotide bases found in DNA are identical to those in RNA.

Correct AnswerverifiedShow Answer

Which of the following is an important feature of carbon and that makes life possible?

Correct AnswerverifiedShow Answer

A monomer is to a polymer, as glucose is to

Correct AnswerverifiedShow Answer

Which of the following are important features of carbon and the diversity of organic molecules?

Correct AnswerverifiedShow Answer

This class of macromolecules serves as important energy stores and is a major component of plasma membranes.

Correct AnswerverifiedShow Answer

Which macromolecule has the highest diversity of functions?

Correct AnswerverifiedShow Answer

Friedrich Wö hler refuted the scientific concept of vitalism during the early 1800s by proving that organic molecules could be synthesized outside a living organism.

Correct AnswerverifiedTrue

An amino acid is to a protein as a ________ is to a nucleic acid.

Correct AnswerverifiedC

Which of the following has identical molecular formulas but different structures and characteristics?

Correct AnswerverifiedShow Answer

Which of the following molecules is nonpolar?

Correct AnswerverifiedB

All are true about a dehydration reaction EXCEPT which of the following?

Correct AnswerverifiedShow Answer

Which is true of the base pairing seen between two DNA strands?

Correct AnswerverifiedShow Answer

Organic molecules with identical molecular formulas and that are structurally mirror images of each other are most specifically referred to as

Correct AnswerverifiedShow Answer

If a specimen contains 30% adenine in its DNA then how much cytosine will there be?

Correct AnswerverifiedShow Answer

Which of these is NOT a lipid?

Correct AnswerverifiedShow Answer

Lipids and carbohydrates have similar functions insofar as they can represent a form of energy store in animals.

Correct AnswerverifiedShow Answer

The tertiary structure of a protein is dependent on

Correct AnswerverifiedShow Answer

Which of the molecules below is NOT a subunit for building macromolecules?

Correct AnswerverifiedShow Answer

Macromolecules such as lipids and carbohydrates are produced from simple subunits through condensation reactions.

Correct AnswerverifiedShow Answer

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True

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C

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B

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