Question

Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?

• A. Fructose
• B. Galactose
• C. Ribose
• D. Glucose

Answer 1

Answer: (A), (C)

Ribose

• Ribose and fructose are present as five membered cyclic structures.

• Glucose and galactose are present as six membered cyclic structures.

Hence, the correct options are $\left(A\right)$ and $\left(C\right)$.