GATE BT 2011 • Q2
MCQ • 1 Mark
Section 2: General Biotechnology
Cell structure and signaling
Subtopic: Fundamentals of Cell structure and signaling
Question Statement:
Members of the antibody protein family that have common structural features are
collectively known as
Options:
-
(A) haptens
-
(B) allergens
-
(C) antigens
-
(D) immunoglobulins
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2011 Q.2)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: Biotechnology
- **Question Type**: **MCQ** (1 Mark)
- **Core Topic**: Quantitative & Analytical Aptitude
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Members of the antibody protein family that have common structural features are
collectively known as..."*
- **Option (D) [CORRECT]**: *"immunoglobulins"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"haptens"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (B) [INCORRECT]**: *"allergens"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"antigens"* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **D**
- **Scoring Criteria**: 1 Mark (Negative marking: -0.33 marks).
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