GATE BT 2015 • Q27
MCQ • 1 Mark
Section 2: General Biotechnology
Microbial growth kinetics
Subtopic: Fundamentals of Microbial growth kinetics
Question Statement:
Which one of the following relations holds true for the specific growth rate (p) of a microorganism
in the death phase?
Options:
-
(A) + = 0
-
(B) H< 0
-
(C) | = |max
-
(D) 0 < M < Hmax
Д
2.V B
3. % C
4.% D
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2015 Q.27)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **MCQ** (1 Mark)
- **Core Topic**: Biochemistry, Microbiology & Molecular Biology
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Which one of the following relations holds true for the specific growth rate (p) of a microorganism
in the death phase?..."*
- **Option (B) [CORRECT]**: *"H< 0"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"+ = 0"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"| = |max"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"0 < M < Hmax
Options :
1.*
Д
2.V B
3. % C
4.% D"* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **B**
- **Scoring Criteria**: 1 Mark (Negative marking: -0.33 marks).
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