Fill in the blanks: ___________ is involved in breakdown of glucose to produce energy for metabolic activities in a cell.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the cellular component involved in the breakdown of glucose to produce energy for metabolic activities.

2. **Identifying the Process**: The breakdown of glucose begins with glycolysis, which converts glucose into pyruvate. This process occurs in the cytoplasm of the cell.

3. **Further Breakdown**: After glycolysis, pyruvate undergoes oxidation. This process leads to the Krebs Cycle (also known as the Tricarboxylic Acid Cycle), which takes place in the mitochondria.

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