This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
The following affect enzyme activity except: 
Select and explain. 
A. Methylation, B. Acetylation, C. Induction, D. Phosphorylation
C: Induction
Answer: C: Induction 
Explanation: Ans. C. InductionInduction is method of regulation of enzyme quantity.Regulation of enzymesCan be classified as:Regulation of enzyme quality (intrinsic catalytic efficiency)Allosteric regulationCovalent modificationCovalent modificationPhosphorylation/dephosphorylation (most common covalent modification)MethylationAdenylationADP ribosylationAcetylationRegulation of enzyme quantity1. Control of enzyme synthesis2. By induction and repression3. Control of enzyme degradation4. Enzymes are degraded by Ubiquitin-Proteasome pathway.