Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Biomolecules

Question:

What is the name of the given structure?

Options:

α-D-(-)-fructofuranose

β-D-(-)-fructofuranose 

α-D-(-)-glucofuranose

β-D-(-)-glucofuranose

Correct Answer:

α-D-(-)-fructofuranose

Explanation:

The α and β forms of glucose can be represented as a five-membered ring called furanose, resembling the organic compound furan. Since the -OH group of anomeric carbon is at the opposite side to the OH at C3 carbon, it is the α-form of glucopyranose.