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Question
Enzymes are catalysts. They catalyze 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 catalysts. They catalyze 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?
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Solution
The correct option is B Dissolving CO2 in water
Dissolution of CO2 in water
Dissolving CO2 in water can also occur without the involvement of an enzyme in the biosphere. Though carbonic anhydrase is utilised for this interconversion, however, the reaction can also occur in the environment where carbonic anhydrase is absent. Hence, it is the most appropriate option.
Untwining the two strands of DNA
Untwining or unwinding the two strands of DNA is mediated by DNA helicase.
Hydrolysis of sucrose
Untwining or unwinding the two strands of DNA is mediated by DNA helicase.
Hydrolysis of sucrose
The hydrolysis of sucrose into glucose and fructose is mediated by the enzyme invertase/ sucrase.
Formation of a peptide bond
Formation of peptide bonds requires an enzyme Peptidyl transferase.
Final answer: a. Dissolving CO2 in water
Dissolution of CO2 in water
Dissolving CO2 in water can also occur without the involvement of an enzyme in the biosphere. Though carbonic anhydrase is utilised for this interconversion, however, the reaction can also occur in the environment where carbonic anhydrase is absent. Hence, it is the most appropriate option.
Untwining the two strands of DNA
Untwining or unwinding the two strands of DNA is mediated by DNA helicase.
Hydrolysis of sucrose
Untwining or unwinding the two strands of DNA is mediated by DNA helicase.
Hydrolysis of sucrose
The hydrolysis of sucrose into glucose and fructose is mediated by the enzyme invertase/ sucrase.
Formation of a peptide bond
Formation of peptide bonds requires an enzyme Peptidyl transferase.
Final answer: a. Dissolving CO2 in water
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