Question

which of the following sugars is an isomer of glucose? sucrose lactose fructose ribose

Explanation:

Isomers have the same molecular formula but different structures. Glucose has the formula \( C_6H_{12}O_6 \). Sucrose (\( C_{12}H_{22}O_{11} \)) and lactose (\( C_{12}H_{22}O_{11} \)) are disaccharides, ribose (\( C_5H_{10}O_5 \)) is a pentose. Fructose has the same formula (\( C_6H_{12}O_6 \)) as glucose, so it's an isomer.

Answer:

Fructose (the option with "Fructose" text)