Which of the following contain ribosomes?
Mitochondria
Rough Endoplasmic Reticulum
Cytoplasm
Ribosomes are found 'free' in the cytoplasm or bound to the endoplasmic reticulum (ER) to form rough ER. In a mammalian cell, there can be as many as 10 million ribosomes. They are also found in mitochondria. Ribosomes are not found in lysosomes.