Subtopic: Fundamentals of Cell structure and signaling
Question Statement:
Match the cells in Group I with their corresponding entries in Group Il
Group I
Group II
P) Mast cells
1) Activation of the complement pathway
Q Natural killer cells
2) Expression of CD56
R) Neutrophils
3) Contains azurophilic granules
S) Dendritic cells
4) Defense against helminthic infection
5) Production of antibodies specific to bacteria
6) Contains long membranous projections
Options:
(A) P-4, Q-2, R-3, S-5
(B) P-4, Q-2, R-3, S-6
(C) P-3, Q-1, R-2, S-5
(D) P-3, Q-1, R-2, S-6
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2015 Q.43)**
**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 cells in Group I with their corresponding entries in Group Il
Group I
Group II
P) Mast cells
1) Activation of the complement pathway
Q Natural killer cells
2) Expression of CD56
R) Neutrophils
3) Contains azuro..."*
- **Option (B) [CORRECT]**: *"P-4, Q-2, R-3, S-6"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"P-4, Q-2, R-3, S-5"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"P-3, Q-1, R-2, S-5"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"P-3, Q-1, R-2, S-6
Options :
1.
2. 0 B
3.
C
--- PAGE 14 ---
4."* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **B**
- **Scoring Criteria**: 2 Marks (Negative marking: -0.66 marks).
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