A.13.60 - An Introduction to General, Organic, and Biological Chemistry

Question

What are the disaccharides and polysaccharides present in each of the following? (13.6,13.7)

Step-by-Step Solution

Answer

A disaccharide, often known as double sugar, is a compound made up of two simple sugar molecules (monosaccharides) bonded together.

Step 1: Introduction

• Lactose is made up of galactose and glucose connected by a 1,4-glycosidic bond and is present in milk and dairy products.

Step 2: a) Identify the disaccharides and polysaccharides present in each of the following

• Lactose, often known as milk sugar, is commonly found in milk.
• Lactose is a disaccharide that is generated when galactose and glucose are combined.

Step 3: b) Identify the disaccharides and polysaccharides present in each of the following

• The most important of them are sucrose, lactose, and maltose. 
• Sucrose is the most abundant and consists of a molecule of α-glucose and β-fructose linked together.
• Maltose is mainly produced by partial hydrolysis of starch and consists of two glucose units linked by an α-1,4-glycosidic bond.  
• Potatoes contain three main types of sugars: fructose, glucose, and sucrose. Sucrose is a disaccharide formed from glucose and fructose.