Question

Lactoperoxidase (LP) system consist of which of the following components.
A. Lactoperoxidase
B. Thiocyanate (SCN$^-$)
C. Hydrogen peroxide (H$_2$O$_2$)
D. Hydrochloric acid
E. Hydrosulphuric acid
Choose the correct answer.

• A. A, B, C only
• B. A, B only
• C. A, E, D only
• D. A, C, D only

Hint:

LP system = Enzyme + SCN$^-$ + H$_2$O$_2$.

Answer 1

The Correct Option is A

Concept: The lactoperoxidase system is a natural antimicrobial system present in milk that helps in preservation.

Step 1: Components of LP system.

• Lactoperoxidase enzyme
• Thiocyanate ion (SCN$^-$)
• Hydrogen peroxide (H$_2$O$_2$)

Step 2: Mechanism.

• Enzyme catalyzes reaction between SCN$^-$ and H$_2$O$_2$
• Produces antimicrobial compounds

Step 3: Incorrect components.

• Hydrochloric acid → not involved
• Hydrosulphuric acid → not part of system

Step 4: Conclusion.
Correct answer is A, B, C.