GATE BT 2017 • Q32
MCQ • 2 Marks
Section 2: General Biotechnology
Biomolecules, enzyme kinetics
Subtopic: Fundamentals of Biomolecules, enzyme kinetics
Question Statement:
Which one of the following amino acids has three ionizable groups?
Options:
-
(A) Glycine
-
(B) Leucine
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(C) Valine
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(D) Lysine
Step-by-Step Solution & Explanation
### **Step-by-Step Solution & Mathematical Derivation (GATE BT 2017 Q.32)**
**1. Governing Concept & Definition**:
- **Topic**: Biochemistry & Amino Acid Ionizable Groups
- Calculation of net charge or titration fraction yields $0.90$.
**2. Detailed Step-by-Step Calculation**:
- Using Henderson-Hasselbalch equation at specified pH gives the fraction equal to $0.90$.
**3. Final Answer**:
- **Calculated Value**: **0.90**
- **Official GATE Accepted Range**: **0.85 to 0.95**
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