Water molecules and small ions enter a cell through: Question 6Select one:a.defects in the lipid layer of the membrane b.peripheral carbohydratesc.channels formed by integral proteinsd.lipid channelse.peripheral proteins
Question
Water molecules and small ions enter a cell through: Question 6Select one:a.defects in the lipid layer of the membrane b.peripheral carbohydratesc.channels formed by integral proteinsd.lipid channelse.peripheral proteins
Solution
Water molecules and small ions enter a cell through channels formed by integral proteins. So, the correct answer is c. channels formed by integral proteins.
Here's a step-by-step explanation:
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The cell membrane is a selective barrier that controls the passage of substances in and out of the cell.
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This membrane is composed of a phospholipid bilayer with embedded proteins. Some of these proteins span the entire width of the membrane and are known as integral proteins.
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Integral proteins can form channels or pores in the cell membrane.
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These channels allow the passage of certain small, polar molecules like water and ions, which cannot cross the hydrophobic interior of the lipid bilayer on their
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