Are enzymes used to speed up reactions that build molecules, break molecules down,
or both?

Enzymes deals with both .

An enzyme basically acts on a chemical reaction by speeding up the process.

A chemical reaction is either anabolic(synthesis by building up of smaller substances) or catabolic (breaking down of larger/bigger substances). Therefore an enzyme can speed up reactions to build up and break down molecules.

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;