Question

select the true statements. maltose, lactose, and sucrose all contain glucose. maltose is found in rye and barley. maltose is made of galactose and fructose. maltose has the same number of carbon atoms as sucrose and lactose.

Explanation:

1. Statement 1: Maltose is two glucose units, lactose is glucose + galactose, sucrose is glucose + fructose. So all three contain glucose. True.
2. Statement 2: Maltose is produced in grains like rye and barley during germination. True.
3. Statement 3: Maltose is two glucose molecules, not galactose and fructose. False (original check is incorrect here).
4. Statement 4: Maltose, sucrose, and lactose all have the formula \( C_{12}H_{22}O_{11} \), so same number of C atoms. True.

Correct true statements are:

• Maltose, lactose, and sucrose all contain glucose.
• Maltose is found in rye and barley.
• Maltose has the same number of carbon atoms as sucrose and lactose.

(Note: The third statement is false as maltose is glucose - glucose, not galactose - fructose.)

Answer:

• Maltose, lactose, and sucrose all contain glucose.
• Maltose is found in rye and barley.
• Maltose has the same number of carbon atoms as sucrose and lactose.