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:

Esophagus

A muscular tube connecting the throat (pharynx) with the stomach; food is pushed through it by peristaltic movements.

Salivary Amylase

An enzyme found in saliva that starts the process of starch digestion in the mouth.

Nutrient

Substance that an organism must acquire from the environment for growth and survival.

Cecum

A pouch connected to the junction of the small and large intestines which plays a role in absorbing fluids and salts that remain after intestinal digestion.