Which of the following is a disaccharide?
a. glucose
b. sucrose
c. fructose
d. galactose

The correct answer is B - Sucrose. A disaccharide is said to be two monosaccharides joined into one, which happens through a chemical process known as dehydration synthesis or condensation reaction during which a molecule of water is lost. Sucrose is disaccharide that is formed from the combination of two monomers namely glucose and fructose. Generally, disaccharides are sweet when ingested and they are water soluble. They are placed in the category of complex sugars because they consist of two simple sugars combined.

The correct answer is b