How enzyme activity gets altered by inhibitors? Explain.

Enzyme activity is crucial for various biochemical processes in plant physiology and metabolism. Inhibitors are molecules that reduce or block the catalytic activity of enzymes. The alteration of enzyme activity by inhibitors occurs through several mechanisms, which are classified into two main types: reversible and irreversible inhibition. 

### Reversible Inhibition

1. Competitive Inhibition: 
   - In this type, the inhibitor resembles the substrate and competes for binding to the enzyme's active site.
   - This competition prevents the actual substrate from binding to the active site, reducing enzyme activity. 
   - Competitive inhibition can be overcome by increasing substrate concentration, as higher substrate levels increase the likelihood of the substrate binding to the active site instead of the inhibitor.
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