What is the difference between mitochondria and plastids?

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A plastid is not necessarily a specific cell organelle in the way that a mitochondrion is. A plastid is a category of organelle. A chloroplast would be a specific type of plastid, but not all plastids are photosynthetic. A plastid is a double membrane-bound organelle that is found inside plants (and some algae), and they are responsible for activities related to making and/or storing food. The above description points out a couple of key differences between plastids and mitochondria. Plastids are not found in animal cells. Mitochondria are found in both plant and animal cells. Another main difference between the two organelles is their purpose. Plastids are designed to produce food, and mitochondria are designed to use that food in order to produce adenosine triphosphate (ATP).

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