MDCAT Biology MCQ #851

When phospholipids are placed in an aqueous environment, they spontaneously form a bilayer. Which physical property of the fatty acid tails drives them toward the interior?

MDCAT Biology MCQ #851

  1. Question 1

    Q1. When phospholipids are placed in an aqueous environment, they spontaneously form a bilayer. Which physical property of the fatty acid tails drives them toward the interior?

    • A) Hydrophilic attraction
    • B) Hydrophobic exclusion
    • C) Ionic bonding
    • D) Covalent cross-linking

    Answer: Hydrophobic exclusion

    Explanation: Hydrophobic fatty acid tails are pushed together to avoid water. Hydrophilic attraction applies to the heads, which face the water.