Question

Which of the following is sweet in taste but is not a sugar?
A)Starch
B)Saccharine
C)Lactose
D)Protein

Answer 1

Sugar is a class of carbohydrates that is usually sweet in taste. Sugar helps to provide energy to the body. Common examples of sugars are sucrose (table sugar) which is made up of glucose + fructose, Lactose composed of glucose + galactose and maltose is composed of two molecules of glucose. In the body, compound sugars are transferred into simple sugars.

Complete answer:
Sweetness is the kind of simple flavour most widely experienced when consuming sugar-rich foods. Sweet tastes are usually known to be so good in taste except in excess. Apart from sugars such as sucrose, many other chemical substances are sweet, in nature that includes ketones, aldehydes and sugar alcohols. Few of them are sweet at very low quantities, allowing them to be used as non-caloric sugar substitutes.

Now let us find solution from given options:
Starch : It is white and soft powder that is usually tasteless in nature. It is a polymer of monomer glucose units. It gives blue black colour with iodine solution and it is not a sugar.
Saccharine : It is an artificial sweetener which is produced and generated by human sources. It is not a kind of sugar.
Lactose : Lactose is a kind of sugar. It is a sugar that is found in the milk and milk products only and not anywhere else.
Protein : It is a polypeptide of amino acids. Different amino acids are joined by peptide bonds to form a protein.

Hence, the correct answer is option (B)

Note: Natural sugars are known to be present in fruit as fructose and in dairy products, such as milk and cheese, as lactose. Foods that contain natural sugar are important because they provide essential nutrients that keep the body healthy.