That statement is incorrect. Plant cells absolutely can change glucose to starch. In fact, it's one of their primary functions.

Here's why:

* Glucose is a simple sugar, readily used for energy.

* Starch is a complex carbohydrate, a storage form of energy.

* Plants produce glucose through photosynthesis, but they don't always need that glucose immediately.

* Excess glucose is converted into starch and stored in organelles called amyloplasts within plant cells.

* When the plant needs energy, the starch can be broken down back into glucose.

So, plant cells are quite adept at converting glucose to starch and back again!