Question

Match List-I with List-II
\begin{tabular{ll} List-I (Quality Control Test) & List-II (Component or Analyte)
(A) Walker Formal & (I) Starter
(B) Horrall and Elliker & (II) Phage
(C) Dye modification test & (III) Antibiotic
(D) Charm test & (IV) Casein

Choose the correct component which is associated with the respective analytical test :

• (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (IV), (B) - (I), (C) - (II), (D) - (III)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)

Hint:

The "Charm Test" is a well-known industry standard for testing antibiotic residues in milk. Linking (D) to (III) immediately simplifies the matching process.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Quality control tests in dairy science are used to monitor milk composition, starter culture activity, and detect contaminants or bacteriophages.

Step 2: Detailed Explanation:
Let us match each quality control test with its target analyte or component:
- (A) Walker Formal Method: This is a rapid titration method used to estimate the Casein (IV) or total protein content in milk by reacting formaldehyde with amino acid groups.
- (B) Horrall and Elliker Test: This test is used to evaluate the activity and acid-producing capacity of lactic Starter cultures (I).
- (C) Dye modification test: These tests are used to detect the presence of bacteriophages (Phage II) in starter cultures by monitoring changes in dye reduction rates.
- (D) Charm test: This is a widely used rapid receptor assay designed to detect residual Antibiotics (III) in raw milk.
This gives the matching sequence: (A)-(IV), (B)-(I), (C)-(II), (D)-(III).

Step 3: Final Answer:
The correct matching sequence is (A) - (IV), (B) - (I), (C) - (II), (D) - (III), which corresponds to Option (C).