Easy
Identify the cell organelle from the clues: it is called the "powerhouse of the cell", it has a double membrane and it contains its own DNA.
Explanation
Explanation
Step 1: "Powerhouse" means the organelle releases energy (ATP) from food during respiration. This points to mitochondria.
Step 2: Mitochondria are surrounded by two membranes; the inner one is folded into cristae.
Step 3: They have their own circular DNA and ribosomes, so they can make some of their own proteins.
Step 4: Golgi bodies pack and send substances; lysosomes digest waste; ribosomes make proteins. None of them is the powerhouse.
Answer: Mitochondria.
PRO TIP
Re-check your working by substituting the answer back into the original question.