Subtopic: Fundamentals of Biomolecules, enzyme kinetics
Question Statement:
Match enzymes in Group I with their corresponding industrial application
in Group II.
Group I
Group I
P. Amylase
1. Laundry detergent
Q. Invertase
2. Fruit juice clarification
R. Pectinase
3. Liquefaction of sucrose
S. Xylanase
4. Pulp and paper processing
Options:
(A) P-2, Q-3, R-4, S-1
(B) P-1, Q-3, R-2, S-4
(C) P-1, Q-2, R-3, S-4
(D) P-1, Q-4, R-2, S-3
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Concept Analysis (GATE BT 2021 Q.37)**
**1. Governing Concept**:
- **Topic**: Industrial Microbiology & Applied Enzymology
- Matching industrial enzymes with commercial applications:
- **P. Amylase** $\rightarrow$ Stain removal in **laundry detergents** and starch desizing $\rightarrow$ **1**
- **Q. Invertase** ($\beta$-fructofuranosidase) $\rightarrow$ Hydrolysis of sucrose into glucose and fructose, used in **liquefaction of sucrose** / invert sugar syrup in confectionery $\rightarrow$ **3**
- **R. Pectinase** $\rightarrow$ Hydrolysis of plant pectins for **fruit juice clarification** and viscosity reduction $\rightarrow$ **2**
- **S. Xylanase** $\rightarrow$ Hydrolysis of hemicellulose/xylan in bio-bleaching during **pulp and paper processing** $\rightarrow$ **4**
**2. Option Analysis**:
- **Option (A) is INCORRECT**: Misassigns amylase to juice clarification.
- **Option (B) [P-1, Q-3, R-2, S-4] is CORRECT**: Perfectly aligned with commercial enzyme applications.
- **Option (C) is INCORRECT**: Swaps invertase and pectinase.
- **Option (D) is INCORRECT**: Misassigns invertase to pulp and paper.
**3. Final Answer**:
- **Correct Choice**: **B**
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