The main purpose is protection. The lipid bilayer protects the cell from viruses and other threats to the cell. It also maintains homeostasis within the cell by monitoring the amount of substances the enter or exit the cell.
Temporal summation.
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Answer:
Lysosomes
Explanation:
is also called as suicidal bag of the cell as it is involved in digestion of worn out or damaged cell or large molecules into smaller one by secreting digestive enzymes. The smaller molecules is excreted out of the cell though cell membrane.