M2 L4 (Part 1) : Biochemistry Lecture

Which reagents are used to classify sugars as reducing or non-reducing based on their reactivity?

• Tollens', Benedict's, and Fehling's reagents

• Tollens' and Benedict's reagents

• Benedict's and Fehling's reagents

• Tollens' and Fehling's reagents

What is the product called when the aldehyde function of an aldose is oxidized to a carboxylic acid?

• Aldonic acid

• Alditol

• Aldaric acid

• Osazone

What is the result of sodium borohydride reduction of an aldose?

• Formation of aldonic acid

• Formation of aldaric acid

• Formation of alditol chain

• Formation of osazone

What was the purpose of the osazone reaction developed by Emil Fischer?

• To identify aldose sugars differing in configuration at the alpha-carbon

• To detect reducing sugars

• To classify ketoses and aldoses

• To oxidize alditols

What did Ruff degradation of ribose and arabinose reveal?

• Formation of aldaric acid

• Formation of aldonic acid

• Formation of achiral aldaric acid

• Formation of osazone

What defines the configuration of erythrose according to the text?

• Oxidation to aldaric acid

• Kiliani-Fischer synthesis

• Oxidation to aldonic acid

• Ruff degradation

What is the relationship between glucose and mannose based on the text?

• Aldoses

• Epimers at C-2

• Reducing sugars

• Ketoses

What is the common product from the osazone reactions of glucose and mannose?

• Osazone

• Alditol

• Aldonic acid

• Aldaric acid