Question

55) The substance in whose presence the rate of a chemical reaction changes without causing any
chemical change to it is called a
a enzyme
b) reactive
c) oxygen d) catalyst​

Answer 1

Answer:

hey

Explanation:

Answer is Option D catalyst

ok...tq❤

Answer 2

Answer:

1 option is correct .....

Explanation:

Enzyme, a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process.