Question

animal milk is a natural source of the disaccharide lactose. the monosaccharides galactose and glucose combine to form lactose, which gives animal milk its sweet flavor. the model shows the chemical structures of lactose and sucrose. select the true statements. sucrose and lactose have the same chemical formula. the monosaccharides in sucrose are fructose and glucose. the monosaccharides in lactose are galactose and glucose. sucrose and lactose have different chemical structures.

Explanation:

• For the statement "Sucrose and lactose have the same chemical formula": As shown in the image, both lactose and sucrose have the formula \(C_{12}H_{22}O_{11}\), so this statement is true.
• For the statement "The monosaccharides in sucrose are fructose and glucose": From the chemical structure of sucrose in the image, it is composed of glucose and fructose, so this statement is true.
• For the statement "The monosaccharides in lactose are galactose and glucose": According to the chemical structure of lactose in the image, it is made up of galactose and glucose, so this statement is true.
• For the statement "Sucrose and lactose have different chemical structures": By comparing the chemical structures of lactose and sucrose in the image, we can see that their monosaccharide - combination patterns (glycosidic bonds and monosaccharide types in terms of spatial - connection) are different, so this statement is true.

Answer:

All the four statements are true.

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