All naturally occurring sugars can be degraded to ________.

A) D-(-) -glyceraldehyde
B) D-(+) -glyceraldehyde
C) L-(-) -glyceraldehyde
D) L-(+) -glyceraldehyde
E) none of the above

Disregarding stereoisomers, how many different enols can phenylacetone form?

A) 0
B) 1
C) 2
D) 3
E) 4

An enolate attacks an aldehyde and the resulting product is subsequently protonated. What type of reaction is this?

A) a Fischer esterification
B) an acid-catalyzed aldol condensation
C) a base-mediated aldol condensation
D) a Hell-Volhard-Zelinsky reaction
E) a Selman-Jones reaction

The relationship between ketones and their corresponding enols is one of ________.

A) allotropes
B) tautomers
C) enantiomers
D) diastereomers
E) cis-trans isomers

Which of the following types of hydrocarbons is(are) saturated?

A) alkanes
B) alkenes
C) alkynes
D) aromatics
E) All of the above are saturated.