Question

the model shows the chemical structures of lactose and sucrose.

lactose
c₁₂h₂₂o₁₁
sucrose
c₁₂h₂₂o₁₁
select the true statements.
sucrose and lactose have the same chemical formula.
sucrose and lactose have different chemical structures.
the monosaccharides in sucrose are fructose and glucose.
the monosaccharides in lactose are galactose and glucose.

Explanation:

1. For "Sucrose and lactose have the same chemical formula": From the model, both lactose and sucrose have the formula \( C_{12}H_{22}O_{11} \), so this is true.
2. For "Sucrose and lactose have different chemical structures": Lactose is made of galactose and glucose, sucrose is made of glucose and fructose, and their structural arrangements differ, so this is true.
3. For "The monosaccharides in sucrose are fructose and glucose": The model shows sucrose as a combination of glucose and fructose, so this is true.
4. For "The monosaccharides in lactose are galactose and glucose": The model shows lactose as a combination of galactose and glucose, so this is true.

Answer:

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