Which cell structure has a double membrane surrounding it?

The cell structure that has a double membrane surrounding it is the mitochondria. Mitochondria are often referred to as the "powerhouses" of the cell because they are responsible for producing adenosine triphosphate (ATP), the energy currency of the cell, through the process of cellular respiration. The double membrane consists of an outer membrane and an inner membrane. The outer membrane serves as a barrier between the mitochondrion and the cytosol, while the inner membrane is extensively folded into structures known as cristae, which increase the surface area available for energy production processes.

Chloroplasts also have a double membrane surrounding them, as they are the site of photosynthesis in plant cells. However, since the question does not specify that the context was limited to plant cells, mitochondria is typically the primary example referred to in discussions about cellular energy production in all eukaryotic cells. This detail is crucial in plant science, as both organelles play significant roles in energy metabolism, but mitochondria are universally present in nearly all eukaryotic cells, including animal and plant cells.

The Golgi apparatus and cytoplasm, in contrast, do not have a double membrane. The Golgi apparatus consists of a series