Ribosomes are found in both plant and animal cells. The function of Ribosomes is just to make protein. Ribosomes are made in the nucleolus which is part of the nucleus and are located on the rough endoplasmic reticulum and also floating in the cytoplasm. If there were no Ribosomes in cells than there would be no protein and protein is very important because it’s used for repairing damage to the cell.