How are large molecules moved across the plasma membrane into the cell?Group of answer choicesThe Rockchannel proteinsexocytosisendocytosis
Question
How are large molecules moved across the plasma membrane into the cell?Group of answer choicesThe Rockchannel proteinsexocytosisendocytosis
Solution
Large molecules are moved across the plasma membrane into the cell through a process called endocytosis. Here are the steps:
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The cell identifies a substance that it needs to bring inside. This could be a large molecule or even another smaller cell.
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The cell membrane starts to wrap around the substance, forming a pocket.
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As the cell membrane continues to wrap around the substance, the pocket deepens.
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Eventually, the pocket closes off completely. This forms a vesicle, which is a small, spherical compartment separated from the cytosol by at least one lipid bilayer.
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The vesicle is now inside the cell, and it can move around to where it's needed.
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The vesicle can then fuse with other organelles (like the lysosome, if the substance needs to be broken down), releasing its contents.
This process allows the cell to bring in large molecules that wouldn't be able to cross the cell membrane otherwise.
Similar Questions
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The process by which molecules such as glucose are moved into cells along their concentration gradient with the help of membrane-bound carrier proteins is called:Question 17Select one:a.osmosis.b.facilitated diffusion.c.active transport.d.endocytosis.e.exocytosis.
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