Question

why shouldnt the enzyme work on ice?
the enzyme is denatured at low temperatures
the enzymes and substrates kinetic energy is too low preventing both molecules to collide together
the enzyme is too cold to function
the enzyme do not recognize the substrate(s) at low temperatures

Explanation:

Enzyme - substrate reactions rely on molecular collisions. At low temperatures like on ice, the kinetic energy of both the enzyme and substrate is reduced, decreasing the frequency of collisions necessary for the reaction to occur. Enzymes are not denatured at low temperatures (they denature at high temperatures), and they do not lose the ability to recognize substrates solely due to low - temperature. Saying the enzyme is "too cold to function" is a non - scientific and vague explanation.

Answer:

The enzyme's and substrate's kinetic energy is too low preventing both molecules to collide together