Identify the following component of a cell :
An organelle with folding called cristae.

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks to identify an organelle that has folds known as cristae.

2. **Identifying the Organelle**: The organelle that is characterized by having folds called cristae is the mitochondrion.

3. **Structure of Mitochondria**: Mitochondria are double-membraned organelles. They have an outer membrane and an inner membrane.

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