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  • Enzymes are proteins Proteins are long chains of amino acids linked to each other by peptide bonds Amino acids have many functional groups in their structure

Enzymes are proteins. Proteins are long chains of amino acids linked to each other by peptide bonds. Amino acids have many functional groups in their structure. These functional groups are, many of them at least, ionisable. As they are weak acids and bases in chemical nature, this ionisation is influenced by the pH of the solution. For many enzymes, activity is influenced by the surrounding pH. This is depicted in the curve below, explain

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Solution:

Explanation of this question can be summed up as below:
1. This variation triggers changes in charge of amino acid.
2. Dependence of enzyme on pH is because of the existence of charged amino acid at its active site.
3. The enzymatic activity reduces when pH is fewer than the optimal pH.

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