The Empty Label in the Following Scheme Most Likely Should

question 27

Multiple Choice

The empty label in the following scheme most likely should read

• A) carbohydrates.
• B) fiber.
• C) all broken-down materials.
• D) all usable nutrients.

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Definitions:

(S)-glyceraldehyde

The S-configuration enantiomer of glyceraldehyde, which serves as a standard for determining the absolute configuration of chiral molecules.

(R)-glyceraldehyde

A carbohydrate that is the R-enantiomer of glyceraldehyde, serving as a simple monosaccharide and a basic building block for more complex sugars.

(-)-glyceraldehyde

A specific stereoisomer of glyceraldehyde, a simple sugar molecule that serves as an intermediate in several metabolic pathways.

(+)-glyceraldehyde

An enantiomer of glyceraldehyde, denoted as having a positive optical rotation; it is a simple sugar and plays a role in several metabolic pathways.