Subtopic: Fundamentals of Microbial growth kinetics
Question Statement:
Amino acid residue which is most likely to be found in the interior of water-soluble globular
proteins is
(A) Threonine (B) Aspartic acid (C) Valine (D) Histidine
Options:
(A) Threonine
(B) Aspartic acid
(C) Valine
(D) Histidine
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2014 Q.18)**
**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: *"In a batch culture of Penicillium chrysogenum, the maximum penicillin synthesis occurs during the..."*
- **Option (B) [CORRECT]**: *"exponential phase"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"lag phase"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"stationary phase"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"death phase
BT
1/9
BT (GATE 2014)
GATE 2014 "* 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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