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
Option (a) Dissolving CO2 in water is the answer.