INBDE (Integrated National Board Dental Examination) 2026 – 400 Free Practice Questions to Pass the Exam

Lysozyme is a type of enzyme that is found in our body fluids, such as saliva and tears. Its main function is to break down the cell walls of certain bacteria, making it an important part of our immune system. Option A, inactivating enzymes, is incorrect because lysozyme is not responsible for inactivating enzymes within the body. Option C, absorbing toxins, is incorrect because while lysozyme does have some antibacterial properties, its main function is not to absorb toxins. Option D, inactivating iron, is incorrect because lysozyme does not have any known function in relation to iron. Therefore, the correct and most specific answer is B, as it accurately describes the primary function of lysozyme in breaking down cell walls.