A drop of perspiration was introduced into a nutrient medium. After incubation for 24 hours, the total bacterial count was checked and it was found to be negligible compared to the bacterial count in the tap water. This is due to the presence of:

Lipase

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Lysozyme

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Protease

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Sodium chloride

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Solution

The correct option is B Lysozyme
Perspiration is also known as sweat. It mainly contains water along with other components. It also has an antimicrobial enzyme known as lysozyme. Lysozyme breaks the cell wall of the bacteria, thereby, killing them.

This is the reason why the nutrient medium containing a drop of perspiration had a negligible bacterial count compared to the bacterial count in the tap water, which does not contain this enzyme.

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