Multiple Choice
Which chemical group below indicates that the sugar is a reducing disaccharide? Is 'C' an acetal or ketal?
9. Carbohydrates
Reducing Sugars
Struggling with Biochemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the molecules below have a reducing end?
A
Molecule 1.
B
Molecule 2.
C
Molecule 3.
D
Both Molecules 2 and 3.
E
Molecules 1, 2, and 3.
Verified step by step guidance1
Understand the concept of a reducing end: In carbohydrates, a reducing end is the end of the molecule that has a free anomeric carbon, which is capable of acting as a reducing agent.
Examine Molecule 1: This molecule is a disaccharide with both anomeric carbons involved in the glycosidic bond, meaning it does not have a free anomeric carbon and thus no reducing end.
Examine Molecule 2: This molecule is a disaccharide where one of the anomeric carbons is free (not involved in the glycosidic bond), indicating the presence of a reducing end.
Examine Molecule 3: This molecule is also a disaccharide with one free anomeric carbon, suggesting it has a reducing end.
Conclude that Molecules 2 and 3 have reducing ends because they each have a free anomeric carbon, while Molecule 1 does not.
Related Videos
Related Practice
Reducing Sugars practice set
Problem sets built by lead tutorsExpert video explanations