COMEDK2021ChemistryBiomolecules
Which one of the following sets of monosaccharides forms sucrose?
Options
- A-D-galactopyranose and -D-glucopyranose
- B-D-glucopyranose and -D-fructofuranose
- C-D-glucopyranose and -D-fructofuranose
- D-D-glucopyranose and -D-fructopyranose
Correct answer
B. -D-glucopyranose and -D-fructofuranose
Step-by-step solution
Sucrose is a disaccharide composed of two monosaccharide units linked by a glycosidic bond. The two units are -D-glucopyranose and -D-fructofuranose. The glycosidic linkage is formed between the C1 of -D-glucopyranose and the C2 of -D-fructofuranose, which is an , -1,2-glycosidic linkage. Answer: -D-glucopyranose and -D-fructofuranose