Which of the following monosaccharides are present as five-membered cyclic structure (furanose structure)?
(a) Ribose (b) Glucose (c) Fructose (d) Galactose

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Solution

Answers: (a) Ribose, and (c) Fructose
Ribose and fructose have five-membered cyclic furanose structure because it includes 5 carbon atom containing polyhydroxy carbonyl compound.
Hence (a) and (c) is the correct choice.

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Similar questions

Classify the following into monosaccharides and disaccharides.

Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose

QUESTION 14.4

Classify the following into monosaccharides and disaccharides, Ribose, 2- deoxyribose, maltose, galactose, fructose and lactose.

Choose the correct combinations of the monosaccharides forming disaccharides.

i. Glucose + Glucose = Maltose ii. Glucose + Fructose = Lactose

iii. Glucose + Fructose = Sucrose iv. Glucose + Galactose = Lactose

Choose the correct combinations of the monosaccharides forming disaccharides.
i. Glucose + Glucose = Maltose ii. Glucose + Fructose = Lactose

iii. Glucose + Fructose = Sucrose iv. Glucose + Galactose = Lactose

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