[angelica_26]

Hi, if I wanted to break fructose down into its basic glucose monomers, what enzyme (or other?) would I use? And is this enzyme commercially available? Also, is there a way to convert glucose into a polysachharide such as amylose or amylopectin? Thank you. 

[Arkcon]

Hi, if I wanted to break fructose down into its basic glucose

Yes, there's an enzyme that does that.

monomers,

Urm ... no, glucose is not a monomer of fructose, and fuctose is not a polymer.

what enzyme (or other?) would I use? And is this enzyme commercially available?

Yes.

Also, is there a way to convert glucose into a polysachharide such as amylose or amylopectin? Thank you. 

Urm, yes, living things do, in fact, do this all the time.  Commercially, however, building biopolymers is a little tricky.  We do have a purely chemical maens of making short proteins and oligonucleotides, but large biopolymers are usually harvested from the natural sources.

A first year college biochemistry book will probably give you all the details you'd need, in the very first couple of chapters.