A scientist carried out an experiment to separate the organelles in an animal cell by mass.
The scientist mixed the cells with a buffer solution which had the same water potential as the cells. He then broke the cells open with a blender to release the organelles.
The extracted mixture was filtered and then spun in a centrifuge at a speed that separates the heaviest organelle. This organelle sank to the bottom, forming a solid pellet, 1.
The liquid above pellet 1 was poured into a clean centrifuge tube and spun in the centrifuge at a higher speed to separate the next heaviest organelle. This organelle sank to the bottom, forming a solid pellet, 2.
He repeated this procedure twice more to obtain pellet 3 and pellet 4, each containing a single organelle.
What is the function of the organelle extracted in pellet 4?
1 )
digestion of old organelles
2 )
production of ATP
3 )
production of mRNA
synthesis of protein
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