BIOMOLECULES AND ENZYMES

BIOLOGY

DISACCHARIDES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a disaccharide?
A
Two simple sugars held together by acetal
B
Two simple sugars held together by acetone
C
Simple salts held together by amino acids
D
Simple sugars made by amino acids
Explanation: 

Detailed explanation-1: -The formation of an acetal (or ketal) bond between two monosaccharides is called a glycosidic bond or glycosidic linkage. Therefore, disaccharides are sugars composed of two monosaccharide units that are joined by a carbon–oxygen-carbon linkage known as a glycosidic linkage.

Detailed explanation-2: -disaccharide, also called double sugar, any substance that is composed of two molecules of simple sugars (monosaccharides) linked to each other. Disaccharides are crystalline water-soluble compounds.

Detailed explanation-3: -Disaccharides consist of two monosaccharide units, linked together with glycosidic bonds in the or orientation. The most important of them are sucrose, lactose, and maltose. Sucrose is the most abundant and consists of a molecule of -glucose and -fructose linked together (Figure 2(a)).

Detailed explanation-4: -A disaccharide (also called a double sugar or biose) is the sugar formed when two monosaccharides are joined by glycosidic linkage. Like monosaccharides, disaccharides are simple sugars soluble in water. Three common examples are sucrose, lactose, and maltose.

Detailed explanation-5: -Disaccharides are composed of two monosaccharide units linked together by a glycosidic bond.

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