HUMAN NUTRITION

NUTRITION

CARBOHYDRATES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What molecules are removed from monosaccharides to form disaccharides or polysaccharides
A
water and oxygen
B
hydrogen and hydroxyl group
C
carbon and hydrogen
D
water and carbon
Explanation: 

Detailed explanation-1: -Monosaccharides are linked by glycosidic bonds that are formed as a result of dehydration reactions, forming disaccharides and polysaccharides with the elimination of a water molecule for each bond formed.

Detailed explanation-2: -Figure: Disaccharides: Sucrose is formed when a monomer of glucose and a monomer of fructose are joined in a dehydration reaction to form a glycosidic bond. In the process, a water molecule is lost.

Detailed explanation-3: -The reaction that links two monosaccharides together is called dehydration synthesis. During this type of reaction one oxygen atom and two hydrogen atoms are removed from the monosaccharides as water. To dehydrate means to remove water, so this type of reaction removes one water molecule.

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