Question

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

Explanation:

1. Maltose, lactose and sucrose are disaccharides with the molecular formula $C_{12}H_{22}O_{11}$, so they have the same number of carbon atoms (12).
2. Maltose is composed of two glucose units, lactose is composed of glucose and galactose, and sucrose is composed of glucose and fructose, so they all contain glucose.
3. Maltose is made of two glucose units, not galactose and fructose.
4. Maltose is found in germinating grains like rye and barley.

Answer:

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