Social Media Management intermediate
Which disaccharide is described as non-reducing because its linkage involves both anomeric carbons?
Answer
Sucrose
Explanation
Sucrose joins glucose and fructose through a linkage involving both anomeric carbons. Consequently, it has no free unsubstituted anomeric carbon and is described as non-reducing. Maltose and lactose have a free anomeric carbon and are reducing sugars. **Key takeaway:** A free anomeric carbon is central to reducing-sugar behavior. **Glossary:** Anomeric carbon: carbon derived from the carbonyl carbon during sugar cyclization.
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