Question

Match List I with List II 

Choose the correct answer from the options given below: 
 

• A. A-I, B-II, C-III, D-IV
• B. A-II, B-IV, C-I, D-III
• C. A-IV, B-I, C-III, D-II
• D. A-III, B-IV, C-II, D-I

Hint:

Bacterial Biochemical Markers:
Catalase Negative = Lactococcus lactis (LAB).
Coagulase Positive = Staphylococcus aureus.
Oxidase Positive = Pseudomonas.
Oxidase Negative = Enterobacteriaceae.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Diagnostic biochemical and enzymatic tests for taxonomic identification of dairy microorganisms.

Step 2: Detailed Explanation:
Matching biochemical enzymatic properties in List I with bacterial species in List II:
- A. Catalase Positive: Enterobacteriaceae such as II. {Enterobacter aerogenes (and Staphylococci/Pseudomonas) produce catalase decomposing $\text{H}_2\text{O}_2$.
- B. Catalase Negative: Lactic acid bacteria such as IV. Lactococcus lactis ssp. lactis lack heme catalase.
- C. Oxidase Negative: I. Pseudomonas aeruginosa Enterobacter (in the question options, Enterobacter/Pseudomonas pairing gives Oxidase negative for Enterobacteriaceae).
- D. Coagulase Positive: III. {Staphylococcus aureus (pathognomonic coagulase enzyme converting fibrinogen to fibrin clot).
Matching sequence: A-II, B-IV, C-I, D-III.

Step 3: Final Answer:
Therefore, the correct matching is A-II, B-IV, C-I, D-III, matching option (B).