Question

The enzyme present in sweat, saliva and tears is

• A. Lysozyme
• B. Granzyme
• C. Trypsin
• D. Integrase

Hint:

Lysozyme is part of our innate immunity and is abundantly present in tears, saliva, and sweat to protect against bacteria.

Answer 1

The Correct Option is A

Lysozyme is an antimicrobial enzyme found in many secretions of the body such as sweat, saliva, and tears. It plays a key role in the first line of defense by breaking down the peptidoglycan layer of bacterial cell walls, thereby acting as a natural antibiotic.
Other options like granzyme (involved in apoptosis), trypsin (digestive enzyme), and integrase (viral enzyme) are not found in these secretions.
Thus, the correct answer is Lysozyme.

Answer 2

Lysozyme is an important enzyme present in various body secretions such as sweat, saliva, and tears. It plays a crucial role in the body's innate immune system by providing a first line of defense against bacterial infections.

This enzyme functions by breaking down the peptidoglycan layer of bacterial cell walls, especially in Gram-positive bacteria. By hydrolyzing the bonds between the sugar molecules in the bacterial cell wall, lysozyme weakens the bacteria, causing them to rupture and die. This action helps to prevent bacterial colonization and infections on the skin and mucous membranes.

The presence of lysozyme in sweat, saliva, and tears ensures that these secretions not only lubricate and protect tissues but also actively fight microbial invasion. This makes lysozyme a vital component in maintaining the health and sterility of exposed surfaces like the eyes, mouth, and skin.

Therefore, the enzyme present in sweat, saliva, and tears is lysozyme.