Phosphatase test is used for the analysis of:

Question

UnlockIAS · Accepted Answer

Correct — D, All of the above (per the official MPPSC key). The alkaline phosphatase test is best established for milk: alkaline phosphatase, naturally present in raw milk, is destroyed by correct pasteurisation, so a positive result signals under-pasteurised or raw-milk-adulterated milk. The official MPPSC answer key marks the umbrella option (d) as correct, so this card follows the official key; in standard food science the test's documented application is milk-specific.

Why the other options are wrong — (a) The genuine, best-documented use of the test is verifying milk pasteurisation; the official MPPSC key, however, marks the umbrella option (d) rather than milk alone.  (b) Per the official MPPSC key the credited answer is the umbrella option (d), not this single choice.  (c) Per the official MPPSC key the credited answer is the umbrella option (d), not this single choice.

Concept: The (alkaline) phosphatase test is an enzyme-based quality-control assay best documented in dairy science: it detects residual alkaline phosphatase activity in milk, which correct pasteurisation destroys. A positive colour reaction (via a reagent that turns yellow in the presence of active phosphatase) flags milk that was under-pasteurised or later contaminated with raw milk.

State PCS 2021 Q10 — Science & Technology PYQ with Answer

State PCS 2021 Q10 — Science & Technology PYQ with Answer