Lysozyme is present in all except:: (A) Lacrimal secretions, (B) CSF, (C) Saliva, (D) Respiratory tract secretions
Answer is B. Lysozyme is a heat-labile protein which acts as a muraminidase and hence has bactericidal activity. It is present in tears, saliva and all mucosal secretions, but is absent in CSF, sweat and urine