Subtopic: Fundamentals of Biomolecules, enzyme kinetics
Question Statement:
Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion:UPGMA method produces ultrametric tree.
Reason:Sequence alignment is converted into evolutionary distances in UPGMA method.
Options:
(A) Both (a) and (r) are true and (r) is the correct reason for (a)
(B) Both (a) and (r) are true and (r) is not the correct reason for (a)
(C) (a) is true but (r) is false
(D) (a) is false but (r) is true
2013 BIOTECHNOLOGY - BT
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2013 Q.36)**
**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: *"Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion:UPGMA method produces ultrametric tree.
Reason:Sequence alignment is converted into evolutionary distances in UPGMA me..."*
- **Option (B) [CORRECT]**: *"Both (a) and (r) are true and (r) is not the correct reason for (a)"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"Both (a) and (r) are true and (r) is the correct reason for (a)"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (C) [INCORRECT]**: *"(a) is true but (r) is false"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"(a) is false but (r) is true
2013 BIOTECHNOLOGY - BT
BT 9/13"* 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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