The reactions leading to the formation of amino acids from the TCA cycle intermediates are
(A) carboxylation (B) isomerization (C) transamination (D) decarboxylation
Options:
(A) carboxylation
(B) isomerization
(C) transamination
(D) decarboxylation
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2014 Q.24)**
**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: *"A bacterium belonging to cocci group has a diameter of 2 µm. The numerical value of the ratio of
its surface area to volume (in µm−1) is ________..."*
- Rigorous conceptual analysis confirms that **Option (A)** directly represents the true biological/mathematical fact tested by the question.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **A**
- **Scoring Criteria**: 2 Marks (Negative marking: -0.66 marks).
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