This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, 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: Regulation of Enzymes
Can be classified as:
Regulation of Enzyme Quality (Intrinsic Catalytic Efficiency)
• Allosteric Regulation
• Covalent modification. 
Covalent modification
• Phosphorylation/dephosphorylation 
• Methylation
• Adenylation
• ADP ribosylation
• Acetylation.
Regulation of enzyme quantity
Control of Enzyme Synthesis
By Induction and Repression
Control of Enzyme Degradation Enzymes are degraded by Ubiquitin—Proteasome pathway.