Which of the following correctly describes a reaction that forms a disaccharide from two monosaccharides?
a. cellulose + fructose -> maltose
b. glucose + fructose -> sucrose
c. glycogen + lactose -> cellulose
d. lactose + glucose -> galactose

The right answer is b. Glucose + fructose -> sucrose  

Sucrose is a carbohydrate composed of a molecule of glucose associated with a molecule of fructose by a glycosidic bond. It is therefore a diholoside (or disaccharide in the old nomenclature). They also called α-D-glucopyranosyl- (1↔2) -β-D-fructofuranoside and its formula is C12H22O11.

nucleus

would be most reasonable answer tbh

it's a.true. i'm kind of smart.