Plants Need Other Molecules Besides Glucose

Plants need other molecules besides glucose. Where do these molecules, such as cellulose and fructose, come from?

A) Glucose must always be produced first; glucose can then be used as the monomer to form everything else.
B) G3P is directly converted to many other organic molecules besides glucose.
C) Plants absorb those molecules from the environment through their roots.
D) Any molecule beyond glucose must be converted from plant tissues already present.
E) Alternative forms of photosynthesis beyond those described must be producing those molecules.

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