Question

enzymes
reactants
products
activation energy
catalyst
chemical reactions convert to. in nonliving systems, the presence of a(n) allows
the reaction to proceed very quickly and have a lower. in living systems, this function is carried out by proteins called

Explanation:

Chemical reactions convert reactants (starting substances) to products (ending substances). A catalyst speeds up reactions and lowers activation energy (energy needed to start a reaction). In living systems, enzymes (protein - based catalysts) perform this role.

Answer:

reactants, products, catalyst, activation energy, enzymes