The role of enzymes in catalyzing chemical reactions and in metabolic pathways?

Question

I need to know the role of enzymes, both in catalyzing chemical reactions and in metabolic pathways, please. I'm so proud that I did this WHOLE assignment, and I thought it would go off without a hitch, but no, then I come to this question. Help! Thanks in advance.

Answer 1

Enzymes and catalysts lower the activation energy of a given chemical reaction. Without them, the same reactions are possible, but would either use much more energy or wouldn't even occur because the energy cost would be high to achieve. Simple.