An experiment was carried out to separate the cell structures in an animal cell.
The cells were broken open. The extract was filtered and put into a centrifuge tube. This tube was then spun so that the heaviest cell structure sank to the bottom first, forming pellet 1, as shown.
The liquid above pellet 1 was poured into a clean centrifuge tube and spun again at a higher speed to separate the next heaviest cell structure. This cell structure sank to the bottom, forming pellet 2.
This procedure was repeated twice to obtain pellet 3 and pellet 4, each containing a single cell structure.
What is a function of the cell structure extracted in pellet 1?
1 )
digestion of old organelles
2 )
production of ATP
production of mRNA
4 )
synthesis of protein
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