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Which of the following have the S configuration? Which of the following have the S configuration? A) only 1 B) only 2 C) only 1 and 2 D) 1, 2 and 3


A) only 1
B) only 2
C) only 1 and 2
D) 1, 2 and 3

E) B) and C)
F) C) and D)

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Which of the following is the definition of a pair of diastereomers?


A) A pair of structures that are superimposable mirror images of one another
B) A pair of stereoisomers that are non-superimposable mirror images of one another
C) A pair of stereoisomers that are not mirror images of one another
D) A pair of stereoisomers that have equal specific rotations

E) C) and D)
F) All of the above

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How many stereoisomers of 3-chloro-2-methylbutane exist? How many stereoisomers of 3-chloro-2-methylbutane exist? A) 1 B) 2 C) 3 D) 4


A) 1
B) 2
C) 3
D) 4

E) B) and C)
F) B) and D)

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Which of the following structures represent the same stereoisomer? Which of the following structures represent the same stereoisomer? A) only 1 and 2 B) only 1 and 3 C) only 2 and 3 D) 1, 2 and 3


A) only 1 and 2
B) only 1 and 3
C) only 2 and 3
D) 1, 2 and 3

E) B) and C)
F) A) and D)

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Instructions: Consider the structure of streptimidone below to answer the following question(s). Instructions: Consider the structure of streptimidone below to answer the following question(s). Refer to instructions. Assign R or S configuration to each chirality center indicated in streptimidone. Refer to instructions. Assign R or S configuration to each chirality center indicated in streptimidone.

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What is the relationship between the following pair of structures? What is the relationship between the following pair of structures? A) They are enantiomers B) They are diastereomers C) The are constitutional isomers D) They are identical


A) They are enantiomers
B) They are diastereomers
C) The are constitutional isomers
D) They are identical

E) B) and C)
F) C) and D)

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Which of the following compounds is (are) achiral? Which of the following compounds is (are) achiral? A) only 1 B) only 1 and 2 C) only 2 and 3 D) 1, 2 and 3


A) only 1
B) only 1 and 2
C) only 2 and 3
D) 1, 2 and 3

E) B) and C)
F) None of the above

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Which of the following have the R configuration? Which of the following have the R configuration? A) only 1 B) only 2 C) only 1 and 2 D) 1, 2 and 3


A) only 1
B) only 2
C) only 1 and 2
D) 1, 2 and 3

E) A) and D)
F) None of the above

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Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. Instructions: In the molecules below, assign R, S configurations to the chirality center indicated with an arrow. Refer to instructions. The configuration of the carbon atom labeled 20 is _____. Refer to instructions. The configuration of the carbon atom labeled 20 is _____.

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Instructions: Refer to the structure below to answer the following questions. Instructions: Refer to the structure below to answer the following questions. Refer to instructions. Give the complete name of the enantiomer of (S)-(-)-serine. Refer to instructions. Give the complete name of the enantiomer of (S)-(-)-serine.

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2.10 g of an unknown compound was dissolved in 15.00 mL of ethanol. The sample was placed in a 10.0 cm cell in a polarimeter and the angle of rotation was determined to be -18.48 °\degree . What is the specific rotation of this unknown and specify if the compound is levorotatory or dextrorotatory?

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-132 and l...

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The numbers on the carbon center of the following molecule represent atomic numbers. The numbers on the carbon center of the following molecule represent atomic numbers. The molecule is in A) the R configuration. B) the S configuration. C) The carbon is not a chiral center in this molecule. D) The exact configuration cannot be determined without knowing additional atomic numbers. The molecule is in


A) the R configuration.
B) the S configuration.
C) The carbon is not a chiral center in this molecule.
D) The exact configuration cannot be determined without knowing additional atomic numbers.

E) C) and D)
F) A) and B)

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Which of the following structures contain a plane of symmetry? Which of the following structures contain a plane of symmetry? A) 1 B) 2 C) 3 D) All three contain a plane of symmetry


A) 1
B) 2
C) 3
D) All three contain a plane of symmetry

E) C) and D)
F) None of the above

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What is the relationship between the following pair of structures? What is the relationship between the following pair of structures? A) They are enantiomers B) They are diastereomers C) The are constitutional isomers D) They are identical


A) They are enantiomers
B) They are diastereomers
C) The are constitutional isomers
D) They are identical

E) B) and D)
F) C) and D)

Correct Answer

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The biological importance of enantiomers arises from?


A) Biological reactions involve receptor molecules.
B) Biological receptors are chiral.
C) Biological receptors require a specific enantiomer for reaction.
D) Each enantiomer has different biological properties.
E) all of these

F) B) and E)
G) A) and C)

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