31. Each organelle contains DNA, making mitochondrial DNA more plentiful than nuclear DNA. 32. There are several types of organelles in a cell. 33. The nucleus is an organelle found in eukaryotic cells. 34. Symbiogenesis explains the origins of organelles such as mitochondria and chloroplasts in endophagocytosis. 35. Lysosomes are organelles that contain hydrolytic enzymes that are used for intracellular digestion. 36. Peroxisomes are organelles found in virtually all eukaryotic cells. 37. He specialized in subcellular biochemistry and cell biology and discovered new cell organelles . 38. Later prokaryotic cells were incorporated to form more organelles . 39. The sarcomere does not contain organelles or a nucleus. 40. Granular disintegration of the axonal cytoskeleton and inner organelles occurs after axolemma degradation.