Question

What biomolecule does gel electrophoresis analyzes?

Answer 1

Agarose gel ?

Answer 2

@Miracrown is correct, it is Aragose gel.

http://en.wikipedia.org/wiki/Agarose_gel_electrophoresis

Answer 3

the molecules analyzed are not the ones that make up the gel matrix (e.g. agarose, polyacrylamide); i think the question is asking about the molecules one can resolve using the technique, which would be nucleic acids and proteins.