Enzymes are biocatalysts. They catalyse biochemical reactions. In general,they reduce the activation energy of reactions. Many Physico chemical processes are enzyme-mediated. Which of the following reactions is not enzyme mediated in the biological system?
Enzymes are biocatalysts. They catalyse biochemical reactions. In general,they reduce the activation energy of reactions. Many Physico chemical processes are enzyme-mediated. Which of the following reactions is not enzyme mediated in the biological system?

a. Dissolving CO2 in water

b. Untwining the two strands of DNA

c. Hydrolysis of sucrose

d. Formation of peptide bond

A)correct option -A

B)Explanation of correct option –

Carbon dioxide dissolves in water to form carbonic acid.