Glycolysis is common for both aerobic and anaerobic respiration.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Glycolysis**: Glycolysis is the initial stage of cellular respiration, where glucose is broken down to extract energy. It is a critical process that occurs in both aerobic and anaerobic conditions.

2. **Process of Glycolysis**: In glycolysis, a 6-carbon glucose molecule is broken down into two 3-carbon molecules called pyruvate. This breakdown releases energy that is captured in the form of ATP (adenosine triphosphate).

3. **Location of Glycolysis**: Glycolysis takes place in the cytoplasm of the cell. This is significant because the cytoplasm is the part of the cell where various metabolic processes occur, and it is accessible regardless of the presence of oxygen.

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