Section 4: Bioprocess Engineering and Process Biotechnology
Bioreactor types, scale-up
Subtopic: Fundamentals of Bioreactor types, scale-up
Question Statement:
Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion: Immobilization of plant cells can enhance secondary metabolite production during
bioreactor cultivation.
Reason: Immobilization protects the plant cells from shear forces in the bioreactor.
Options:
(A) Both (a) and (r) are true and (r) is the correct reason for (a).
(B) Both (a) and (r) are true but (r) is not the correct reason for (a).
(C) (a) is true but (r) is false.
(D) (a) is false but (r) is true.
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2013 Q.28)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **MCQ** (2 Marks)
- **Core Topic**: Bioprocess Engineering
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion: Immobilization of plant cells can enhance secondary metabolite production during
bioreactor cultivation.
Reason: Imm..."*
- **Option (A) [CORRECT]**: *"Both (a) and (r) are true and (r) is the correct reason for (a)."*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (B) [INCORRECT]**: *"Both (a) and (r) are true but (r) is not the correct reason for (a)."* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"(a) is true but (r) is false."* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"(a) is false but (r) is true."* 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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