Enzymes are biocatalysts. They catalyse biochemical reactions. In general they reduce activation energy of reactions. Many physico-chemical processes are enzyme mediated. Which of the following reactions is not enzyme-mediated in biological system?
in water
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gets dissolved in water, a reaction which is not always catalysed by any enzyme. Unwinding and winding of the two strands of DNA is catalysed by the enzyme topoisomerase. Hydrolysis of sucrose is regulated by sucrase. Peptide bonds are formed by the action of enzyme peptidyl transferase.
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