Carbohydrate Stereochemistry Quiz

What does the D and L configuration in carbohydrates refer to?

• The type of functional group present

• The number of carbon atoms in the molecule

• The stereochemistry of the last chiral center

• The overall optical activity of the molecule

How do D and L glucose differ?

• They differ at only the last chiral carbon

• They differ at every chiral carbon

• They have different numbers of carbon atoms

• They have different functional groups

What are diastereomers?

• Molecules that differ at every chiral carbon

• Molecules that are mirror images of each other

• Molecules that are not mirror images and not superimposable

• Molecules with the same optical activity

What is an epimer?

• A molecule with identical chiral centers

• A diastereomer that differs at one chiral center

• A molecule with no chiral centers

• A type of enantiomer

How many stereoisomers are possible for an aldohexose?

• 24

• 8

• 12

• 16

How many chiral centers do pentoses have?

• 2

• 3

• 5

• 4

What is the mnemonic for remembering the structure of ribose?

• Ribose is 'up and down'

• Ribose is 'all left'

• Ribose is 'half and half'

• Ribose is 'all right'

Which monosaccharide is known as the C4 epimer of glucose?

• Fructose

• Ribose

• Mannose

• Galactose

What functional group does fructose have that differentiates it from glucose?

• Ether

• Alcohol

• Aldehyde

• Ketone

Which monosaccharide is remembered as 'man with a gun'?

• Galactose

• Glucose

• Ribose

• Mannose