Question

The following compound can be called as:

Options

• L(+) - glucose

• D(+) - glucose

• D(−) - glucose

• L(−) - glucose

Answer 1

D(+) - glucose

Explanation:

Glucose is correctly named as D(+) - glucose. ‘D’ before the name of glucose represents the configuration whereas ‘(+)’ represents the dextrorotatory nature of the molecule. When the −OH group lies on the right-hand side in the structure it is said to have D-configuration. In (+) glucose, −OH on the lowest asymmetric carbon is on the right side so (+) glucose is assigned D-configuration.