GATE BT 2010 • Q23 MCQ • 1 Mark

Section 2: General Biotechnology

Bioenergetics and Metabolism

Subtopic: Thermodynamics & ATP Bioenergetics

Question Statement:

Oxidation reduction reactions with positive standard reduction potential (ΔE°') will have

Options:

  • (A) negative ΔG°'
  • (B) positive ΔG°'
  • (C) positive ΔE
  • (D) negative ΔE°'

Official Answer Key:

A

Step-by-Step Solution & Explanation

### **Official Solution & Step-by-Step Derivation (GATE BT 2010 Q.23)** **1. Governing Concept & Syllabus Classification**: - **Section**: Biotechnology - **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: *"Oxidation reduction reactions with positive standard redox potential (AE°) have..."* - **Option (B) [CORRECT]**: *"positive AE"* - Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required. - **Option (C) [INCORRECT]**: *"positive AG°"* does not satisfy the precise boundary conditions or molecular specificity. - **Option (D) [INCORRECT]**: *"negative AG" negative dE*"* does not satisfy the precise boundary conditions or molecular specificity. **3. Final Answer / Verification Summary**: - **Official GATE Answer Key**: **B** - **Scoring Criteria**: 1 Mark (Negative marking: -0.33 marks).

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