Subtopic: Fundamentals of Cell structure and signaling
Question Statement:
Prior exposure of plants to pathogens is known to increase resistance to future pathogen attacks.
This phenomenon is known as
(A) systemic acquired resistance (B) hypersensitive response
(C) innate immunity (D) antibody mediated response
Options:
(A) systemic acquired resistance
(B) hypersensitive response
(C) innate immunity
(D) antibody mediated response
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2014 Q.20)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **MCQ** (2 Marks)
- **Core Topic**: Cellular & Applied Biotechnology
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Which of the following is employed for the repeated use of enzymes in bioprocesses?..."*
- **Option (A) [CORRECT]**: *"polymerization"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (B) [INCORRECT]**: *"immobilization"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"ligation"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"isomerization"* 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).
Practice This in Real CBT Exam Interface
Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.