Question

multiple choice question
in membranes, lipids associate ______.

• hydrophilic head to hydrophobic tail
• hydrophobic tail to hydrophobic tail
• hydrophilic head to hydrophilic head

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Explanation:

Cell membrane lipids are amphipathic, with hydrophilic heads and hydrophobic tails. In the lipid bilayer, hydrophobic tails associate with each other (avoiding aqueous environments), while hydrophilic heads face the surrounding water. This is the core structural feature of biological membranes.

Answer:

hydrophobic tail to hydrophobic tail