The catalase worked best at 37 °C because the temperature is optimal.
Enzyme and temperature
Enzymes are proteinous substances that are capable of speeding up the rate of biological reactions.
However, enzymes are very specific in actions and work best at a specific temperature range.
Below the temperature range, the activities of enzymes reduce and may even become denatured.
More on enzymes can be found here: https://brainly.com/question/14953274
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