Question

compare the chemical structures of lactose and sucrose.

	lactose	sucrose
is a disaccharide
contains the monosaccharide fructose

Explanation:

Step1: Analyze lactose structure

Lactose is a disaccharide composed of galactose and glucose. Its formula is $C_{12}H_{22}O_{11}$, so it has 12 carbon and 11 oxygen atoms.

Step2: Analyze sucrose structure

Sucrose is a disaccharide made up of glucose and fructose. Its formula is also $C_{12}H_{22}O_{11}$, having 12 carbon and 11 oxygen atoms. And it contains the monosaccharide fructose.

Answer:

	lactose	sucrose
is a disaccharide	Yes	Yes
contains the monosaccharide fructose	No	Yes