Question

Formation of bond between which pair of substrates given below is not a type of dehydration reaction?

• A. Glucose and fructose in sucrose
• B. Glycerol and stearic acid in fats.
• C. Adenine and deoxyribose in DNA
• D. Guanine and cytosine in DNA

Answer 1

The correct option is D Guanine and cytosine in DNA

Dehydration reaction is that reaction in which two or more monomer linked together with the help of the removal of water.

Glucose and fructose in sucrose linked together through the glycosidic linkage. A glycosidic linkage is formed with the help of the removal of the water molecule.

In a fat molecule, the hydroxyl groups (OH) of the glycerol molecule and carboxyl groups (COOH) of three fatty acids interact with each other. As a result of which three water molecules are released and glycerol molecule become covalently linked with three fatty acids via the ester linkage.

Adenine is a purine, and it forms a glycosidic linkage between their 9' nitrogen and 1'-OH of deoxyribose sugar.

Guanine and cytosine are bonded through the hydrogen bond.

So, the correct option is 'Guanine and cytosine in DNA'.