GATE BT 2023 • Q55
NAT • 2 Marks
Section 2: General Biotechnology
Biomolecules, enzyme kinetics
Subtopic: Fundamentals of Biomolecules, enzyme kinetics
Question Statement:
DNA sample collected from an unidentified bacterial species (Y) contains 13% of
adenine. The G+C content (in percentage) of Y is ___________.
Official Answer Key:
74 to 74
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2023 Q.55)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **NAT** (2 Marks)
- **Core Topic**: Biochemistry, Microbiology & Molecular Biology
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Mathematical & Quantitative Formulation**:
- Problem Statement: *"DNA sample collected from an unidentified bacterial species (Y) contains 13% of
adenine. The G+C content (in percentage) of Y is ___________...."*
- Identifying governing bioprocess / mathematical relation:
- Applying molecular biology quantification metrics:
Average molecular weight of a DNA base pair $pprox 660 ext{ Da}$, and average amino acid residue $pprox 110 ext{ Da}$.
$\text{Number of base pairs} = \frac{\text{Molecular Weight (Da)}}{660\text{ Da/bp}}$
- **Calculated Quantitative Value**: **74 to 74**.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **74 to 74**
- **Scoring Criteria**: 2 Marks (Negative marking: -0.0 marks).
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