Question

maltose is a disaccharide found mostly in the seeds of wheat, oats, rice, barley, rye, and millet. the model shows the chemical structure of maltose. compare the chemical structure of maltose to lactose and sucrose. complete the sentences. maltose is a disaccharide made of the glucose. compared to lactose and sucrose, maltose has the same number of carbon, hydrogen, and oxygen atoms.

Explanation:

1. For the first blank after "made of the", from the maltose structure (two glucose units), lactose is glucose + galactose, sucrose is glucose + fructose. So maltose is made of two glucose molecules, so the term for the bond or the composition: maltose is a disaccharide made of two (or "two molecules of") glucose? Wait, the structure shows maltose as two glucose units linked. So the first dropdown (after "made of the"): maltose is a disaccharide made of two (or "two molecules of") glucose? Wait, the sentence structure: "Maltose is a disaccharide made of the [blank] glucose." Wait, maybe "two molecules of" or "two" but looking at the structures: maltose: glucose + glucose; lactose: glucose + galactose; sucrose: glucose + fructose. So maltose is made of two glucose units (so "two molecules of" or "two" but the dropdown—maybe "two molecules of" or the key is that maltose is composed of two glucose monomers (so "two" or "two units of"). Then, the last part: "the same number of [blank] carbon, hydrogen, and oxygen atoms." Maltose, lactose, sucrose all have formula \( C_{12}H_{22}O_{11} \), so they have the same number of carbon, hydrogen, oxygen atoms. So the first blank (after "made of the"): since maltose is two glucose (each glucose is \( C_6H_{12}O_6 \), so two glucose would be \( C_{12}H_{24}O_{12} \), but maltose is \( C_{12}H_{22}O_{11} \) because of dehydration synthesis: \( C_6H_{12}O_6 + C_6H_{12}O_6

ightarrow C_{12}H_{22}O_{11} + H_2O \)). So maltose is made of two glucose molecules (monomers) linked by a glycosidic bond. So the first blank (the dropdown) should be "two molecules of" or "two" (but the options—assuming the dropdown has "two molecules of" or similar, but from the structure, maltose is glucose + glucose, so "two" (or "two units of") glucose. Then, the last blank: since all three (maltose, lactose, sucrose) have formula \( C_{12}H_{22}O_{11} \), they have the same number of carbon, hydrogen, and oxygen atoms. So the sentences:

Maltose is a disaccharide made of the two (or "two molecules of") glucose. Compared to lactose and sucrose, maltose has the same number of carbon, hydrogen, and oxygen atoms.

Wait, the first dropdown (after "made of the"): looking at the structure, maltose is two glucose units. So the correct term is "two molecules of" or "two" (but the options—maybe the dropdown has "two" or "two units of" or "two molecules of"). Then, the key points:

• Maltose composition: two glucose monomers (so "two" glucose, or "two molecules of" glucose).
• Molecular formula: all three disaccharides (maltose, lactose, sucrose) have \( C_{12}H_{22}O_{11} \), so same number of C, H, O atoms.

So completing the sentences:

Maltose is a disaccharide made of the two glucose. Compared to lactose and sucrose, maltose has the same number of carbon, hydrogen, and oxygen atoms.

Wait, maybe the first blank (the dropdown) is "two molecules of" or "two" (but the original sentence: "made of the [blank] glucose"—maybe "two" (as in two glucose molecules). So the correct completion:

Maltose is a disaccharide made of the two glucose. Compared to lactose and sucrose, maltose has the same number of carbon, hydrogen, and oxygen atoms.

(Note: The molecular formula for maltose, lactose, and sucrose is \( C_{12}H_{22}O_{11} \), so they have the same number of C, H, O atoms. Maltose is formed by two glucose units (dehydration synthesis: loss of one water molecule, so \( C_6H_{12}O_6 + C_6H_{12}O_6
ightarrow C_{12}H_{22}O_{11} + H_2O \)), lactose is glucose + galactose, sucrose is glucose + fructose.)

Answer:

Maltose is a disaccharide made of the \(\boldsymbol{\text{two (molecules of)}}\) glucose. Compared to lactose and sucrose, maltose has the same number of \(\boldsymbol{\text{carbon, hydrogen, and oxygen}}\) atoms.

(Note: The first blank's exact wording may depend on the dropdown options, but the key is "two" (referring to two glucose units). The last part confirms the same number of C, H, O atoms due to identical molecular formulas (\(C_{12}H_{22}O_{11}\)) for all three disaccharides.)