GATE BT 2013 • Q11
MCQ • 1 Mark
Section 3: Genetics, Cellular and Molecular Biology
DNA replication, transcription, translation
Subtopic: Fundamentals of DNA replication, transcription, translation
Question Statement:
Phylum proteobacteria is subdivided into -, -, -, - and -proteobacteria based on
(A) G+C content (B) 23S rRNA sequences
(C)tRNA sequences (D)16S rRNA sequences
2013 BIOTECHNOLOGY - BT
Options:
-
(A) G+C content
-
(B) 23S rRNA sequences
-
(C) tRNA sequences
-
(D) 16S rRNA sequences
2013 BIOTECHNOLOGY - BT
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2013 Q.11)**
**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: *"Phylum proteobacteria is subdivided into -, -, -, - and -proteobacteria based on..."*
- **Option (D) [CORRECT]**: *"16S rRNA sequences
2013 BIOTECHNOLOGY - BT
BT 5/13"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"G+C content"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (B) [INCORRECT]**: *"23S rRNA sequences"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"tRNA sequences"* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **D**
- **Scoring Criteria**: 1 Mark (Negative marking: -0.33 marks).
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