Answer: All of the above.
Step-by-step explanation:
Enzymes can be defined as the proteins that does nit takes part in the chemical or biochemical reaction but enhances the rate of reaction.
All the enzymes are proteinous in nature and gets denatured at a very high temperature. They are known as catalyst which can increase the rate of reaction by decreasing the activation energy.
Hence, all the given options are correct regarding enzymes.