Question

Sweetest sugar is
A. Fructose
B. Glucose
C. Mannose
D. Lactose

Answer 1

Hint:It is also known as fruit sugar as it is present in many plants. This sugar is naturally found in honey, root vegetables, fruits, etc.

Complete answer:
Sweetness is the simple flavor most widely experienced when consuming sugar-rich foods. Sweet tastes are usually known to be pleasing, except in excess. Apart from sugars such as sucrose, many other chemical substances are sweet, namely ketones, aldehydes and sugar alcohols. Few of them are sweet at very low doses, allowing them to be used as non-caloric sugar substitutes. These non-sugar sweeteners are aspartame and saccharin. Other chemicals, such as miraculin may affect the sense of sweetness itself.
Fructose is a basic ketone monosaccharide present in many plants where it is mostly bound with glucose to form disaccharide sucrose. One of the three dietary monosaccharides absorbed directly into the blood along with galactose and glucose during digestion. Fructose is the sweetest sugar.
Glucose is the most common monosaccharide, a subcategory of carbohydrates. Glucose is primarily produced by plants and most algae during photosynthesis from carbon dioxide and water, using the energy of sunlight. In this process cellulose is created in the cell walls, which is the richest carbohydrate.
Mannose is a sugar monomer in the aldohexose sequence of carbohydrates. It is the C-2 glucose epimer. Mannose is important in the metabolism of humans, particularly in the glycosylation of certain proteins.
Lactose is a large sugar molecule made up of two smaller sugar molecules. In order to consume lactose from the intestine and into the bloodstream, it must first be separated into glucose and galactose.

Thus, the correct answer is option A. i.e., Fructose.

Note:Fructose is a monosaccharide with the sweetness of 1.17 to 1.75. Glucose is also a monosaccharide with the sweetness of 0.74 to 0.8. Lactose is a disaccharide which has the sweetness of 0.16.