Use the Figure to Answer the Question

question 32

Multiple Choice

Use the figure to answer the question.

Thalidomide and L-dopa (see figure) are examples of pharmaceutical drugs that occur as enantiomers, or molecules that ________.

• A) have identical three-dimensional shapes
• B) are mirror images of one another
• C) are mirror images of one another and have the same biological activity
• D) are cis-trans isomers

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Definitions:

Chair Conformation

A stable, puckered conformation of six-membered rings that minimizes torsional strain.

Axial

Refers to positions or directions parallel to the axis of symmetry in a molecule or crystal.

Equitorial

Refers to the positioning of substituents in a cyclic compound, where the groups are oriented along the equator of the molecule, often leading to more stable conformations.

Terpene Classification

A system of categorizing terpenes, organic compounds produced by plants, based on their chemical structure and the number of isoprene units they contain.