Question:
The enzyme with lowest turn over number is
The enzyme with lowest turn over number is
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Enzymes differ in catalytic efficiency; lysozyme has low turnover because substrate hydrolysis is slow compared to specialized enzymes like penicillinase.
Updated On: Jun 19, 2026
- Penicillinase
- Chymotrypsin
- Tryptophan synthetase
- Lysozyme
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The Correct Option is D
Solution and Explanation
Step 1: Understanding turnover number.
Turnover number (k\(_\text{cat}\)) of an enzyme is the number of substrate molecules converted to product per enzyme molecule per second under optimal conditions.
Step 2: Compare enzymes.
- Penicillinase: High k\(_\text{cat}\), rapidly hydrolyzes penicillin.
- Chymotrypsin: Protease with relatively high turnover rate.
- Tryptophan synthetase: Moderate catalytic rate.
- Lysozyme: Catalyzes hydrolysis of glycosidic bonds in bacterial cell walls, but very slow, low k\(_\text{cat}\).
Step 3: Conclusion.
Therefore, among the options, Lysozyme has the lowest turnover number.
Turnover number (k\(_\text{cat}\)) of an enzyme is the number of substrate molecules converted to product per enzyme molecule per second under optimal conditions.
Step 2: Compare enzymes.
- Penicillinase: High k\(_\text{cat}\), rapidly hydrolyzes penicillin.
- Chymotrypsin: Protease with relatively high turnover rate.
- Tryptophan synthetase: Moderate catalytic rate.
- Lysozyme: Catalyzes hydrolysis of glycosidic bonds in bacterial cell walls, but very slow, low k\(_\text{cat}\).
Step 3: Conclusion.
Therefore, among the options, Lysozyme has the lowest turnover number.
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