Question

Natural glucose is termed D-glucose because :
(a) – OH on the second carbon is on the right side in Fischer projection
(b) – OH on the sixth carbon is on the right side in Fischer projection.
(c) – OH on the fifth carbon is on the right side in Fischer projection.
(d) It is dextrorotatory.

Answer 1

(d) it is dextrorotatory .

Answer 2

Answer:

The correct answer is (c) – OH on the fifth carbon is on the right side in Fischer projection. Compounds with their OH to the right of the bottom chiral were given the prefix "D" by Fischer, thus, D-glucose is the name given to natural glucose.

Explanation:

Natural glucose:

• Glucose has the chemical formula C₆H₁₂O₆ and is a simple sugar.
• Glucose is the most common monosaccharide, which is a type of carbohydrate.
• D-glucose is the naturally occurring type of glucose, whereas L-glucose is synthesised in small amounts and is less physiologically active.
• Glucose is an aldohexose because it is a monosaccharide with six carbon atoms and an aldehyde group.
• The glucose molecule can be found in two forms: open-chain (acyclic) and ring (cyclic).
• Glucose is a naturally occurring sugar that can be found in fruits and other plant parts in its free form.
• Glycogenolysis is a process in which glucose is produced from the breakdown of glycogen in animals.