Which of these molecules is correctly matched with its method of movement through the cell membrane?Multiple ChoiceGlucose and amino acid molecules — pass through membrane channels.Large, water-soluble molecules — transported by carrier-mediated processes.All of the choices are correctly paired.Lipid-soluble molecules — pass through membrane channels.Small, water-soluble molecules (ions) — dissolve in double phospholipid layer.
Question
Which of these molecules is correctly matched with its method of movement through the cell membrane?Multiple ChoiceGlucose and amino acid molecules — pass through membrane channels.Large, water-soluble molecules — transported by carrier-mediated processes.All of the choices are correctly paired.Lipid-soluble molecules — pass through membrane channels.Small, water-soluble molecules (ions) — dissolve in double phospholipid layer.
Solution
The correct answer is "Large, water-soluble molecules — transported by carrier-mediated processes."
Here's why:
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Glucose and amino acid molecules: These molecules are too large to pass through membrane channels. They are transported into the cell via carrier proteins in a process called facilitated diffusion.
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Large, water-soluble molecules: These molecules cannot pass through the lipid bilayer of the cell membrane because they are not lipid-soluble. They are transported by carrier-mediated processes, such as facilitated diffusion
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