What is the proces of fermentation?

Explanation

### Step-by-Step Solution:

1. **Definition of Fermentation**:
- Fermentation is a metabolic process that occurs in the absence of oxygen (anaerobic conditions).

2. **Role of Microorganisms**:
- During fermentation, specific microorganisms, such as bacteria and yeast, play a crucial role in the process. They are responsible for converting substrates into different products.

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