A double membrane encloses which two organelles?

Explanation

### Step-by-Step Solution:

1. **Understanding Organelles**: Begin by recognizing that cells contain various organelles, which can be categorized into membrane-bound and non-membrane-bound organelles. Eukaryotic cells have more complex structures compared to prokaryotic cells.

2. **Identifying Membrane-Bound Organelles**: Focus on the membrane-bound organelles. These organelles are surrounded by membranes, which can be single or double-layered. Examples include the endoplasmic reticulum, Golgi apparatus, mitochondria, and nucleus.

3. **Focusing on Double Membrane**: Among the membrane-bound organelles, identify those that are specifically enclosed by a double membrane. A double membrane consists of an outer membrane and an inner membrane, with an intramembrane space in between.

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