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Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material?

1. Easily translocated
2. Chemically non-reactive
3. Easily digested by animals
4. Osmotically inactive

Correct answer: Osmotically inactive

Solution

Starch is useful for storage because it is osmotically inactive, so it can be accumulated in large amounts without lowering water potential and causing water to enter cells. The other options describe transport or digestibility, not the key storage advantage in plants.

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