Question

Why glucose is called glucopyranose?

• A. Glucose is aldohexose
• B. Glucose is a heterocyclic compound contianing five carbon atoms and one oxygen atom
• C. Glucose is ketohexose
• D. Glucose is a heterocyclic compound containing six carbon atoms

Answer 1

The correct option is B Glucose is a heterocyclic compound contianing five carbon atoms and one oxygen atom

The six membered cyclic structure of glucose is called pyranose structure ​(𝛼- or 𝛽-form), in analogy with pyran.​

Glucose has a heterocyclic structure with 5 carbon atoms and 1 oxygen atom in the ring.
This structure resembles a lot the structure of Pyranose.
Thus Glucose is called glucopyranose.