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Multiple Choice
In the context of basic cell biology, what happens when a cell lyses?
A
The cell shrinks due to water leaving by osmosis, while the plasma membrane remains intact.
B
The plasma membrane ruptures, causing loss of cellular contents into the surrounding environment.
C
The cell stops metabolism but maintains membrane integrity and does not release its contents.
D
The cell divides into two genetically identical daughter cells through cytokinesis.
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1
Understand the term 'cell lysis': it refers to the breaking down or rupture of the cell membrane, leading to the release of the cell's internal contents into the surrounding environment.
Recall that the plasma membrane acts as a barrier that maintains the integrity of the cell by controlling what enters and leaves the cell.
When a cell lyses, the plasma membrane is compromised or ruptured, which means it can no longer contain the cytoplasm and organelles inside the cell.
As a result of the membrane rupture, cellular contents such as ions, proteins, and other molecules spill out into the extracellular space.
This process is different from other cellular events like osmosis (which involves water movement without membrane rupture), metabolism cessation (which does not involve membrane rupture), or cell division (which involves the formation of two new cells).