A scientist performed an experiment to separate the organelles in an animal cell according to mass. The cells were combined with a buffer solution that had the same water potential as the cells. A blender was used to break the cells open and release the organelles. The resulting mixture was filtered and then placed in a centrifuge at high speed so that the heaviest type of organelle could be separated. These organelles settled at the bottom, creating solid pellet 1. The liquid above pellet 1 was transferred to a clean centrifuge tube and spun in the centrifuge at a higher speed to separate the next heaviest type of organelle. These organelles settled at the bottom, creating solid pellet 2. This process was repeated twice more to produce pellet 3 and pellet 4, each containing one type of organelle only. What is the main function of the type of organelle obtained in pellet 2?
- Adigestion of old organelles
- Bproduction of ATP
- Cproduction of mRNA
- Dsynthesis of protein