DENDROLOGY

TREE PHYSIOLOGY

PHOTOSYNTHESIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which reaction is needed to join two monosaccharides?
A
Hydration
B
Dehydration
C
Dehydrogenation
D
Hydrolysis
Explanation: 

Detailed explanation-1: -Disaccharides form when two monosaccharides undergo a dehydration reaction (a condensation reaction); they are held together by a covalent bond. Sucrose (table sugar) is the most common disaccharide, which is composed of the monomers glucose and fructose.

Detailed explanation-2: -In a dehydration synthesis reaction between two un-ionized monomers, such as monosaccharide sugars, the hydrogen of one monomer combines with the hydroxyl group of another monomer, releasing a molecule of water in the process.

Detailed explanation-3: -The second example, a biological process, will involve the dehydration synthesis of glucose, a monosaccharide, to form a disaccharide, sucrose. Monosaccharides are classified as simple sugars. They are used as the building blocks for complex sugars.

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