Subtopic: Fundamentals of Downstream processing (chromatography, filtration)
Question Statement:
Match the organisms in Group I with the entries in Group II.
Group I Group II
P. Clostridium 1. Rods with teichoic acid in the cell wall
Q. Escherichia 2. Rods with endospores
R. Vibrio 3. Helical rods with flagella
S. Bacillus 4. Rods with LPS in the outer membrane
5. Curved rods with polar flagella
(A) P-2, Q-4, R-5, S-1 (B) P-2, Q-1, R-5, S-4
(C) P-5, Q-4, R-2, S-3 (D) P-3, Q-2, R-1, S-4
Options:
(A) P-2, Q-4, R-5, S-1
(B) P-2, Q-1, R-5, S-4
(C) P-5, Q-4, R-2, S-3
(D) P-3, Q-2, R-1, S-4
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2012 Q.41)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **MCQ** (2 Marks)
- **Core Topic**: Biochemistry, Microbiology & Molecular Biology
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Match the organisms in Group I with the entries in Group II.
Group I Group II
P. Clostridium 1. Rods with teichoic acid in the cell wall
Q. Escherichia 2. Rods with endospores
R. Vibrio 3. Helical rods with flage..."*
- **Option (A) [CORRECT]**: *"P-2, Q-4, R-5, S-1"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (B) [INCORRECT]**: *"P-2, Q-1, R-5, S-4"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"P-5, Q-4, R-2, S-3"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"P-3, Q-2, R-1, S-4"* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **A**
- **Scoring Criteria**: 2 Marks (Negative marking: -0.66 marks).
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