Question

select the true statements. sucrose and lactose have different chemical structures. the monosaccharides in lactose are galactose and glucose. sucrose and lactose have the same chemical formula. the monosaccharides in sucrose are fructose and glucose.

Explanation:

1. By observing the chemical - structure diagrams, sucrose and lactose have different arrangements of atoms, so they have different chemical structures.
2. Lactose is a disaccharide composed of galactose and glucose.
3. Both sucrose and lactose have the chemical formula $C_{12}H_{22}O_{11}$.
4. Sucrose is a disaccharide made up of fructose and glucose.

Answer:

Sucrose and lactose have different chemical structures.
The monosaccharides in lactose are galactose and glucose.
Sucrose and lactose have the same chemical formula.
The monosaccharides in sucrose are fructose and glucose.