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Biomolecules — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules3 Marks
Question
Explain the following items: Biocatalysts.
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Answer

Biocatalysts: A number of reactions that occur in the bodies of animals and plants to maintain the life process are catalysed by enzymes. The enzymes are thus termed as biocatalysts. Almost all the enzymes are globular proteins. An enzyme catalyses a biochemical reaction by providing alternate lower activation path thereby increasing the rate of the biochemical reaction. For example, activation energy for acid hydrolysis of sucrose is $6.22\ kJ \text{ mol}^{-1}$ while the activation energy is only $2.15\ kJ \text{ mol}^{-1}$ when hydrolysed in the presence of enzyme sucrase.

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