BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The carbonyl group on the second carbon atom in ketohexose is on the second carbon atom. Hexose refers to a six-carbon monosaccharide. As a result, psicose is ketohexose as a monosaccharide.

Detailed explanation-2: -Monosaccharides can be classified by the number x of carbon atoms they contain: triose (3), tetrose (4), pentose (5), hexose (6), heptose (7), and so on. Glucose, used as an energy source and for the synthesis of starch, glycogen and cellulose, is a hexose.

Detailed explanation-3: -The most common hexoses are glucose, galactose, mannose, and fructose. The first three are aldoses, whereas fructose is a ketose.

Detailed explanation-4: -Glucose is the most abundant monosaccharide. Galactose, mannose, fructose and ribose are also of major biological importance.

Detailed explanation-5: -The monosaccharides can be divided into groups based on the number of carbon atoms in the molecules, thus: trioses have 3-C atoms, tetroses have 4-C atoms, pentoses have 5-C atoms, and hexoses have 6-C atoms. Within each of these groups there are different compounds, each with the same molecular formula.